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30secondsofcode
2020-03-10 08:25:32 +00:00
parent e87af43b70
commit f6182e9d3b
12 changed files with 109 additions and 107 deletions
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20
snippet_data/snippetList.json
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@ -832,7 +832,7 @@
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128
snippet_data/snippets.json
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@ -1347,8 +1347,8 @@
"fileName": "deepClone.md", "fileName": "deepClone.md",
"text": "Creates a deep clone of an object.\n\nUse recursion.\nCheck if the passed object is `null` and, if so, return `null`.\nUse `Object.assign()` and an empty object (`{}`) to create a shallow clone of the original.\nUse `Object.keys()` and `Array.prototype.forEach()` to determine which key-value pairs need to be deep cloned.\n\n", "text": "Creates a deep clone of an object.\n\nUse recursion.\nCheck if the passed object is `null` and, if so, return `null`.\nUse `Object.assign()` and an empty object (`{}`) to create a shallow clone of the original.\nUse `Object.keys()` and `Array.prototype.forEach()` to determine which key-value pairs need to be deep cloned.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const deepClone = obj => {\n if (obj === null) return null;\n let clone = Object.assign({}, obj);\n Object.keys(clone).forEach(\n key => (clone[key] = typeof obj[key] === 'object' ? deepClone(obj[key]) : obj[key])\n );\n return Array.isArray(obj) && obj.length\n ? (clone.length = obj.length) && Array.from(clone)\n : Array.isArray(obj)\n ? Array.from(obj)\n : clone;\n};", "es6": "const deepClone = obj => {\n if (obj === null) return null;\n let clone = Object.assign({}, obj);\n Object.keys(clone).forEach(\n key => (clone[key] = typeof obj[key] === 'object' ? deepClone(obj[key]) : obj[key])\n );\n return Array.isArray(obj) && obj.length\n ? (clone.length = obj.length) && Array.from(clone)\n : Array.isArray(obj)\n ? Array.from(obj)\n : clone;\n};",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar deepClone = function deepClone(obj) {\n if (obj === null) return null;\n var clone = Object.assign({}, obj);\n Object.keys(clone).forEach(function (key) {\n return clone[key] = _typeof(obj[key]) === 'object' ? deepClone(obj[key]) : obj[key];\n });\n return Array.isArray(obj) && obj.length ? (clone.length = obj.length) && Array.from(clone) : Array.isArray(obj) ? Array.from(obj) : clone;\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar deepClone = function deepClone(obj) {\n if (obj === null) return null;\n var clone = Object.assign({}, obj);\n Object.keys(clone).forEach(function (key) {\n return clone[key] = _typeof(obj[key]) === 'object' ? deepClone(obj[key]) : obj[key];\n });\n return Array.isArray(obj) && obj.length ? (clone.length = obj.length) && Array.from(clone) : Array.isArray(obj) ? Array.from(obj) : clone;\n};",
"example": "const a = { foo: 'bar', obj: { a: 1, b: 2 } };\nconst b = deepClone(a); // a !== b, a.obj !== b.obj" "example": "const a = { foo: 'bar', obj: { a: 1, b: 2 } };\nconst b = deepClone(a); // a !== b, a.obj !== b.obj"
}, },
"tags": [ "tags": [
@ -1358,10 +1358,10 @@
] ]
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@ -1450,8 +1450,8 @@
"fileName": "deepMapKeys.md", "fileName": "deepMapKeys.md",
"text": "Deep maps an object's keys.\n\nCreates an object with the same values as the provided object and keys generated by running the provided function for each key.\nUse `Object.keys(obj)` to iterate over the object's keys. \nUse `Array.prototype.reduce()` to create a new object with the same values and mapped keys using `fn`.\n\n", "text": "Deep maps an object's keys.\n\nCreates an object with the same values as the provided object and keys generated by running the provided function for each key.\nUse `Object.keys(obj)` to iterate over the object's keys. \nUse `Array.prototype.reduce()` to create a new object with the same values and mapped keys using `fn`.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const deepMapKeys = (obj, f) =>\n Array.isArray(obj)\n ? obj.map(val => deepMapKeys(val, f))\n : typeof obj === 'object'\n ? Object.keys(obj).reduce((acc, current) => {\n const val = obj[current];\n acc[f(current)] =\n val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);\n return acc;\n }, {})\n : obj;", "es6": "const deepMapKeys = (obj, f) =>\n Array.isArray(obj)\n ? obj.map(val => deepMapKeys(val, f))\n : typeof obj === 'object'\n ? Object.keys(obj).reduce((acc, current) => {\n const val = obj[current];\n acc[f(current)] =\n val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);\n return acc;\n }, {})\n : obj;",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar deepMapKeys = function deepMapKeys(obj, f) {\n return Array.isArray(obj) ? obj.map(function (val) {\n return deepMapKeys(val, f);\n }) : _typeof(obj) === 'object' ? Object.keys(obj).reduce(function (acc, current) {\n var val = obj[current];\n acc[f(current)] = val !== null && _typeof(val) === 'object' ? deepMapKeys(val, f) : acc[f(current)] = val;\n return acc;\n }, {}) : obj;\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar deepMapKeys = function deepMapKeys(obj, f) {\n return Array.isArray(obj) ? obj.map(function (val) {\n return deepMapKeys(val, f);\n }) : _typeof(obj) === 'object' ? Object.keys(obj).reduce(function (acc, current) {\n var val = obj[current];\n acc[f(current)] = val !== null && _typeof(val) === 'object' ? deepMapKeys(val, f) : acc[f(current)] = val;\n return acc;\n }, {}) : obj;\n};",
"example": "const obj = {\n foo: '1',\n nested: {\n child: {\n withArray: [\n {\n grandChild: ['hello']\n }\n ]\n }\n }\n};\nconst upperKeysObj = deepMapKeys(obj, key => key.toUpperCase());\n/*\n{\n \"FOO\":\"1\",\n \"NESTED\":{\n \"CHILD\":{\n \"WITHARRAY\":[\n {\n \"GRANDCHILD\":[ 'hello' ]\n }\n ]\n }\n }\n}\n*/" "example": "const obj = {\n foo: '1',\n nested: {\n child: {\n withArray: [\n {\n grandChild: ['hello']\n }\n ]\n }\n }\n};\nconst upperKeysObj = deepMapKeys(obj, key => key.toUpperCase());\n/*\n{\n \"FOO\":\"1\",\n \"NESTED\":{\n \"CHILD\":{\n \"WITHARRAY\":[\n {\n \"GRANDCHILD\":[ 'hello' ]\n }\n ]\n }\n }\n}\n*/"
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@ -1461,10 +1461,10 @@
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@ -1679,8 +1679,8 @@
"fileName": "dig.md", "fileName": "dig.md",
"text": "Returns the target value in a nested JSON object, based on the given key.\n\nUse the `in` operator to check if `target` exists in `obj`.\nIf found, return the value of `obj[target]`, otherwise use `Object.values(obj)` and `Array.prototype.reduce()` to recursively call `dig` on each nested object until the first matching key/value pair is found.\n\n", "text": "Returns the target value in a nested JSON object, based on the given key.\n\nUse the `in` operator to check if `target` exists in `obj`.\nIf found, return the value of `obj[target]`, otherwise use `Object.values(obj)` and `Array.prototype.reduce()` to recursively call `dig` on each nested object until the first matching key/value pair is found.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const dig = (obj, target) =>\n target in obj\n ? obj[target]\n : Object.values(obj).reduce((acc, val) => {\n if (acc !== undefined) return acc;\n if (typeof val === 'object') return dig(val, target);\n }, undefined);", "es6": "const dig = (obj, target) =>\n target in obj\n ? obj[target]\n : Object.values(obj).reduce((acc, val) => {\n if (acc !== undefined) return acc;\n if (typeof val === 'object') return dig(val, target);\n }, undefined);",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar dig = function dig(obj, target) {\n return target in obj ? obj[target] : Object.values(obj).reduce(function (acc, val) {\n if (acc !== undefined) return acc;\n if (_typeof(val) === 'object') return dig(val, target);\n }, undefined);\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar dig = function dig(obj, target) {\n return target in obj ? obj[target] : Object.values(obj).reduce(function (acc, val) {\n if (acc !== undefined) return acc;\n if (_typeof(val) === 'object') return dig(val, target);\n }, undefined);\n};",
"example": "const data = {\n level1: {\n level2: {\n level3: 'some data'\n }\n }\n};\ndig(data, 'level3'); // 'some data'\ndig(data, 'level4'); // undefined" "example": "const data = {\n level1: {\n level2: {\n level3: 'some data'\n }\n }\n};\ndig(data, 'level3'); // 'some data'\ndig(data, 'level4'); // undefined"
}, },
"tags": [ "tags": [
@ -1690,10 +1690,10 @@
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@ -1935,7 +1935,7 @@
"text": "Performs a deep comparison between two values to determine if they are equivalent.\n\nCheck if the two values are identical, if they are both `Date` objects with the same time, using `Date.getTime()` or if they are both non-object values with an equivalent value (strict comparison).\nCheck if only one value is `null` or `undefined` or if their prototypes differ.\nIf none of the above conditions are met, use `Object.keys()` to check if both values have the same number of keys, then use `Array.prototype.every()` to check if every key in the first value exists in the second one and if they are equivalent by calling this method recursively.\n\n", "text": "Performs a deep comparison between two values to determine if they are equivalent.\n\nCheck if the two values are identical, if they are both `Date` objects with the same time, using `Date.getTime()` or if they are both non-object values with an equivalent value (strict comparison).\nCheck if only one value is `null` or `undefined` or if their prototypes differ.\nIf none of the above conditions are met, use `Object.keys()` to check if both values have the same number of keys, then use `Array.prototype.every()` to check if every key in the first value exists in the second one and if they are equivalent by calling this method recursively.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const equals = (a, b) => {\n if (a === b) return true;\n if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime();\n if (!a || !b || (typeof a !== 'object' && typeof b !== 'object')) return a === b;\n if (a.prototype !== b.prototype) return false;\n let keys = Object.keys(a);\n if (keys.length !== Object.keys(b).length) return false;\n return keys.every(k => equals(a[k], b[k]));\n};", "es6": "const equals = (a, b) => {\n if (a === b) return true;\n if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime();\n if (!a || !b || (typeof a !== 'object' && typeof b !== 'object')) return a === b;\n if (a.prototype !== b.prototype) return false;\n let keys = Object.keys(a);\n if (keys.length !== Object.keys(b).length) return false;\n return keys.every(k => equals(a[k], b[k]));\n};",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar equals = function equals(a, b) {\n if (a === b) return true;\n if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime();\n if (!a || !b || _typeof(a) !== 'object' && _typeof(b) !== 'object') return a === b;\n if (a.prototype !== b.prototype) return false;\n var keys = Object.keys(a);\n if (keys.length !== Object.keys(b).length) return false;\n return keys.every(function (k) {\n return equals(a[k], b[k]);\n });\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar equals = function equals(a, b) {\n if (a === b) return true;\n if (a instanceof Date && b instanceof Date) return a.getTime() === b.getTime();\n if (!a || !b || _typeof(a) !== 'object' && _typeof(b) !== 'object') return a === b;\n if (a.prototype !== b.prototype) return false;\n var keys = Object.keys(a);\n if (keys.length !== Object.keys(b).length) return false;\n return keys.every(function (k) {\n return equals(a[k], b[k]);\n });\n};",
"example": "equals({ a: [2, { e: 3 }], b: [4], c: 'foo' }, { a: [2, { e: 3 }], b: [4], c: 'foo' }); // true" "example": "equals({ a: [2, { e: 3 }], b: [4], c: 'foo' }, { a: [2, { e: 3 }], b: [4], c: 'foo' }); // true"
}, },
"tags": [ "tags": [
@ -2065,7 +2065,7 @@
"fileName": "factorial.md", "fileName": "factorial.md",
"text": "Calculates the factorial of a number.\n\nUse recursion.\nIf `n` is less than or equal to `1`, return `1`.\nOtherwise, return the product of `n` and the factorial of `n - 1`.\nThrows an exception if `n` is a negative number.\n\n", "text": "Calculates the factorial of a number.\n\nUse recursion.\nIf `n` is less than or equal to `1`, return `1`.\nOtherwise, return the product of `n` and the factorial of `n - 1`.\nThrows an exception if `n` is a negative number.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const factorial = n =>\n n < 0\n ? (() => {\n throw new TypeError('Negative numbers are not allowed!');\n })()\n : n <= 1\n ? 1\n : n * factorial(n - 1);", "es6": "const factorial = n =>\n n < 0\n ? (() => {\n throw new TypeError('Negative numbers are not allowed!');\n })()\n : n <= 1\n ? 1\n : n * factorial(n - 1);",
"es5": "var factorial = function factorial(n) {\n return n < 0 ? function () {\n throw new TypeError('Negative numbers are not allowed!');\n }() : n <= 1 ? 1 : n * factorial(n - 1);\n};", "es5": "var factorial = function factorial(n) {\n return n < 0 ? function () {\n throw new TypeError('Negative numbers are not allowed!');\n }() : n <= 1 ? 1 : n * factorial(n - 1);\n};",
"example": "factorial(6); // 720" "example": "factorial(6); // 720"
}, },
@ -2076,10 +2076,10 @@
] ]
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@ -2322,7 +2322,7 @@
"text": "Flatten an object with the paths for keys.\n\nUse recursion.\nUse `Object.keys(obj)` combined with `Array.prototype.reduce()` to convert every leaf node to a flattened path node.\nIf the value of a key is an object, the function calls itself with the appropriate `prefix` to create the path using `Object.assign()`.\nOtherwise, it adds the appropriate prefixed key-value pair to the accumulator object.\nYou should always omit the second argument, `prefix`, unless you want every key to have a prefix.\n\n", "text": "Flatten an object with the paths for keys.\n\nUse recursion.\nUse `Object.keys(obj)` combined with `Array.prototype.reduce()` to convert every leaf node to a flattened path node.\nIf the value of a key is an object, the function calls itself with the appropriate `prefix` to create the path using `Object.assign()`.\nOtherwise, it adds the appropriate prefixed key-value pair to the accumulator object.\nYou should always omit the second argument, `prefix`, unless you want every key to have a prefix.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const flattenObject = (obj, prefix = '') =>\n Object.keys(obj).reduce((acc, k) => {\n const pre = prefix.length ? prefix + '.' : '';\n if (typeof obj[k] === 'object') Object.assign(acc, flattenObject(obj[k], pre + k));\n else acc[pre + k] = obj[k];\n return acc;\n }, {});", "es6": "const flattenObject = (obj, prefix = '') =>\n Object.keys(obj).reduce((acc, k) => {\n const pre = prefix.length ? prefix + '.' : '';\n if (typeof obj[k] === 'object') Object.assign(acc, flattenObject(obj[k], pre + k));\n else acc[pre + k] = obj[k];\n return acc;\n }, {});",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar flattenObject = function flattenObject(obj) {\n var prefix = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';\n return Object.keys(obj).reduce(function (acc, k) {\n var pre = prefix.length ? prefix + '.' : '';\n if (_typeof(obj[k]) === 'object') Object.assign(acc, flattenObject(obj[k], pre + k));else acc[pre + k] = obj[k];\n return acc;\n }, {});\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar flattenObject = function flattenObject(obj) {\n var prefix = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';\n return Object.keys(obj).reduce(function (acc, k) {\n var pre = prefix.length ? prefix + '.' : '';\n if (_typeof(obj[k]) === 'object') Object.assign(acc, flattenObject(obj[k], pre + k));else acc[pre + k] = obj[k];\n return acc;\n }, {});\n};",
"example": "flattenObject({ a: { b: { c: 1 } }, d: 1 }); // { 'a.b.c': 1, d: 1 }" "example": "flattenObject({ a: { b: { c: 1 } }, d: 1 }); // { 'a.b.c': 1, d: 1 }"
}, },
"tags": [ "tags": [
@ -2755,7 +2755,7 @@
"fileName": "getMeridiemSuffixOfInteger.md", "fileName": "getMeridiemSuffixOfInteger.md",
"text": "Converts an integer to a suffixed string, adding `am` or `pm` based on its value.\n\nUse the modulo operator (`%`) and conditional checks to transform an integer to a stringified 12-hour format with meridiem suffix.\n\n", "text": "Converts an integer to a suffixed string, adding `am` or `pm` based on its value.\n\nUse the modulo operator (`%`) and conditional checks to transform an integer to a stringified 12-hour format with meridiem suffix.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const getMeridiemSuffixOfInteger = num =>\n num === 0 || num === 24\n ? 12 + 'am'\n : num === 12\n ? 12 + 'pm'\n : num < 12\n ? (num % 12) + 'am'\n : (num % 12) + 'pm';", "es6": "const getMeridiemSuffixOfInteger = num =>\n num === 0 || num === 24\n ? 12 + 'am'\n : num === 12\n ? 12 + 'pm'\n : num < 12\n ? (num % 12) + 'am'\n : (num % 12) + 'pm';",
"es5": "var getMeridiemSuffixOfInteger = function getMeridiemSuffixOfInteger(num) {\n return num === 0 || num === 24 ? 12 + 'am' : num === 12 ? 12 + 'pm' : num < 12 ? num % 12 + 'am' : num % 12 + 'pm';\n};", "es5": "var getMeridiemSuffixOfInteger = function getMeridiemSuffixOfInteger(num) {\n return num === 0 || num === 24 ? 12 + 'am' : num === 12 ? 12 + 'pm' : num < 12 ? num % 12 + 'am' : num % 12 + 'pm';\n};",
"example": "getMeridiemSuffixOfInteger(0); // \"12am\"\ngetMeridiemSuffixOfInteger(11); // \"11am\"\ngetMeridiemSuffixOfInteger(13); // \"1pm\"\ngetMeridiemSuffixOfInteger(25); // \"1pm\"" "example": "getMeridiemSuffixOfInteger(0); // \"12am\"\ngetMeridiemSuffixOfInteger(11); // \"11am\"\ngetMeridiemSuffixOfInteger(13); // \"1pm\"\ngetMeridiemSuffixOfInteger(25); // \"1pm\""
}, },
@ -2765,10 +2765,10 @@
] ]
}, },
"meta": { "meta": {
"hash": "16c3b724b653dcb31f3e59f1664a59951abb15a93eb3697cade4d3ae0e63c532", "hash": "9e39c6a3a8ec5b51c5e16f69107fc9e90b2697b2cf2689850872071bb968723e",
"firstSeen": "1515856488", "firstSeen": "1515856488",
"lastUpdated": "1583442609", "lastUpdated": "1583481673",
"updateCount": 67, "updateCount": 68,
"authorCount": 4 "authorCount": 4
} }
}, },
@ -3042,7 +3042,7 @@
"text": "Returns `true` if the target value exists in a JSON object, `false` otherwise.\n\nCheck if `keys` is non-empty and use `Array.prototype.every()` to sequentially check its keys to internal depth of the object, `obj`. \nUse `Object.prototype.hasOwnProperty()` to check if `obj` does not have the current key or is not an object, stop propagation and return `false`.\nOtherwise assign the key's value to `obj` to use on the next iteration.\nReturn `false` beforehand if given key list is empty.\n\n", "text": "Returns `true` if the target value exists in a JSON object, `false` otherwise.\n\nCheck if `keys` is non-empty and use `Array.prototype.every()` to sequentially check its keys to internal depth of the object, `obj`. \nUse `Object.prototype.hasOwnProperty()` to check if `obj` does not have the current key or is not an object, stop propagation and return `false`.\nOtherwise assign the key's value to `obj` to use on the next iteration.\nReturn `false` beforehand if given key list is empty.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const hasKey = (obj, keys) => {\n return (\n keys.length > 0 &&\n keys.every(key => {\n if (typeof obj !== 'object' || !obj.hasOwnProperty(key)) return false;\n obj = obj[key];\n return true;\n })\n );\n};", "es6": "const hasKey = (obj, keys) => {\n return (\n keys.length > 0 &&\n keys.every(key => {\n if (typeof obj !== 'object' || !obj.hasOwnProperty(key)) return false;\n obj = obj[key];\n return true;\n })\n );\n};",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar hasKey = function hasKey(obj, keys) {\n return keys.length > 0 && keys.every(function (key) {\n if (_typeof(obj) !== 'object' || !obj.hasOwnProperty(key)) return false;\n obj = obj[key];\n return true;\n });\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar hasKey = function hasKey(obj, keys) {\n return keys.length > 0 && keys.every(function (key) {\n if (_typeof(obj) !== 'object' || !obj.hasOwnProperty(key)) return false;\n obj = obj[key];\n return true;\n });\n};",
"example": "let obj = {\n a: 1,\n b: { c: 4 },\n 'b.d': 5\n};\nhasKey(obj, ['a']); // true\nhasKey(obj, ['b']); // true\nhasKey(obj, ['b', 'c']); // true\nhasKey(obj, ['b.d']); // true\nhasKey(obj, ['d']); // false\nhasKey(obj, ['c']); // false\nhasKey(obj, ['b', 'f']); // false" "example": "let obj = {\n a: 1,\n b: { c: 4 },\n 'b.d': 5\n};\nhasKey(obj, ['a']); // true\nhasKey(obj, ['b']); // true\nhasKey(obj, ['b', 'c']); // true\nhasKey(obj, ['b.d']); // true\nhasKey(obj, ['d']); // false\nhasKey(obj, ['c']); // false\nhasKey(obj, ['b', 'f']); // false"
}, },
"tags": [ "tags": [
@ -3067,7 +3067,7 @@
"text": "Returns `true` if two arrays contain the same elements regardless of order, `false` otherwise.\n\nUse a `for...of` loop over a `Set` created from the values of both arrays.\nUse `Array.prototype.filter()` to compare the amount of occurences of each distinct value in both arrays.\nReturn `false` if the counts do not match for any element, `true` otherwise.\n\n", "text": "Returns `true` if two arrays contain the same elements regardless of order, `false` otherwise.\n\nUse a `for...of` loop over a `Set` created from the values of both arrays.\nUse `Array.prototype.filter()` to compare the amount of occurences of each distinct value in both arrays.\nReturn `false` if the counts do not match for any element, `true` otherwise.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const haveSameContents = (a, b) => {\n for (const v of new Set([...a, ...b]))\n if (a.filter(e => e === v).length !== b.filter(e => e === v).length) return false;\n return true;\n};", "es6": "const haveSameContents = (a, b) => {\n for (const v of new Set([...a, ...b]))\n if (a.filter(e => e === v).length !== b.filter(e => e === v).length) return false;\n return true;\n};",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nfunction _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread(); }\n\nfunction _nonIterableSpread() { throw new TypeError(\"Invalid attempt to spread non-iterable instance\"); }\n\nfunction _iterableToArray(iter) { if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === \"[object Arguments]\") return Array.from(iter); }\n\nfunction _arrayWithoutHoles(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } }\n\nvar haveSameContents = function haveSameContents(a, b) {\n var _iteratorNormalCompletion = true;\n var _didIteratorError = false;\n var _iteratorError = undefined;\n\n try {\n var _loop = function _loop() {\n var v = _step.value;\n if (a.filter(function (e) {\n return e === v;\n }).length !== b.filter(function (e) {\n return e === v;\n }).length) return {\n v: false\n };\n };\n\n for (var _iterator = new Set([].concat(_toConsumableArray(a), _toConsumableArray(b)))[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {\n var _ret = _loop();\n\n if (_typeof(_ret) === \"object\") return _ret.v;\n }\n } catch (err) {\n _didIteratorError = true;\n _iteratorError = err;\n } finally {\n try {\n if (!_iteratorNormalCompletion && _iterator[\"return\"] != null) {\n _iterator[\"return\"]();\n }\n } finally {\n if (_didIteratorError) {\n throw _iteratorError;\n }\n }\n }\n\n return true;\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nfunction _toConsumableArray(arr) { return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread(); }\n\nfunction _nonIterableSpread() { throw new TypeError(\"Invalid attempt to spread non-iterable instance\"); }\n\nfunction _iterableToArray(iter) { if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === \"[object Arguments]\") return Array.from(iter); }\n\nfunction _arrayWithoutHoles(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } }\n\nvar haveSameContents = function haveSameContents(a, b) {\n var _iteratorNormalCompletion = true;\n var _didIteratorError = false;\n var _iteratorError = undefined;\n\n try {\n var _loop = function _loop() {\n var v = _step.value;\n if (a.filter(function (e) {\n return e === v;\n }).length !== b.filter(function (e) {\n return e === v;\n }).length) return {\n v: false\n };\n };\n\n for (var _iterator = new Set([].concat(_toConsumableArray(a), _toConsumableArray(b)))[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {\n var _ret = _loop();\n\n if (_typeof(_ret) === \"object\") return _ret.v;\n }\n } catch (err) {\n _didIteratorError = true;\n _iteratorError = err;\n } finally {\n try {\n if (!_iteratorNormalCompletion && _iterator[\"return\"] != null) {\n _iterator[\"return\"]();\n }\n } finally {\n if (_didIteratorError) {\n throw _iteratorError;\n }\n }\n }\n\n return true;\n};",
"example": "haveSameContents([1, 2, 4], [2, 4, 1]); // true" "example": "haveSameContents([1, 2, 4], [2, 4, 1]); // true"
}, },
"tags": [ "tags": [
@ -3893,7 +3893,7 @@
"text": "Determines if the current runtime environment is a browser so that front-end modules can run on the server (Node) without throwing errors.\n\nUse `Array.prototype.includes()` on the `typeof` values of both `window` and `document` (globals usually only available in a browser environment unless they were explicitly defined), which will return `true` if one of them is `undefined`.\n`typeof` allows globals to be checked for existence without throwing a `ReferenceError`.\nIf both of them are not `undefined`, then the current environment is assumed to be a browser.\n\n", "text": "Determines if the current runtime environment is a browser so that front-end modules can run on the server (Node) without throwing errors.\n\nUse `Array.prototype.includes()` on the `typeof` values of both `window` and `document` (globals usually only available in a browser environment unless they were explicitly defined), which will return `true` if one of them is `undefined`.\n`typeof` allows globals to be checked for existence without throwing a `ReferenceError`.\nIf both of them are not `undefined`, then the current environment is assumed to be a browser.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const isBrowser = () => ![typeof window, typeof document].includes('undefined');", "es6": "const isBrowser = () => ![typeof window, typeof document].includes('undefined');",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isBrowser = function isBrowser() {\n return ![typeof window === \"undefined\" ? \"undefined\" : _typeof(window), typeof document === \"undefined\" ? \"undefined\" : _typeof(document)].includes('undefined');\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isBrowser = function isBrowser() {\n return ![typeof window === \"undefined\" ? \"undefined\" : _typeof(window), typeof document === \"undefined\" ? \"undefined\" : _typeof(document)].includes('undefined');\n};",
"example": "isBrowser(); // true (browser)\nisBrowser(); // false (Node)" "example": "isBrowser(); // true (browser)\nisBrowser(); // false (Node)"
}, },
"tags": [ "tags": [
@ -3944,7 +3944,7 @@
"text": "Returns `true` if the elements of the first array are contained in the second one regardless of order, `false` otherwise.\n\nUse a `for...of` loop over a `Set` created from the first array.\nUse `Array.prototype.some()` to check if all distinct values are contained in the second array, use `Array.prototype.filter()` to compare the number of occurrences of each distinct value in both arrays.\nReturn `false` if the count of any element is greater in the first array than the second one, `true` otherwise.\n\n", "text": "Returns `true` if the elements of the first array are contained in the second one regardless of order, `false` otherwise.\n\nUse a `for...of` loop over a `Set` created from the first array.\nUse `Array.prototype.some()` to check if all distinct values are contained in the second array, use `Array.prototype.filter()` to compare the number of occurrences of each distinct value in both arrays.\nReturn `false` if the count of any element is greater in the first array than the second one, `true` otherwise.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const isContainedIn = (a, b) => {\n for (const v of new Set(a)) {\n if (!b.some(e => e === v) || a.filter(e => e === v).length > b.filter(e => e === v).length)\n return false;\n }\n return true;\n};", "es6": "const isContainedIn = (a, b) => {\n for (const v of new Set(a)) {\n if (!b.some(e => e === v) || a.filter(e => e === v).length > b.filter(e => e === v).length)\n return false;\n }\n return true;\n};",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isContainedIn = function isContainedIn(a, b) {\n var _iteratorNormalCompletion = true;\n var _didIteratorError = false;\n var _iteratorError = undefined;\n\n try {\n var _loop = function _loop() {\n var v = _step.value;\n if (!b.some(function (e) {\n return e === v;\n }) || a.filter(function (e) {\n return e === v;\n }).length > b.filter(function (e) {\n return e === v;\n }).length) return {\n v: false\n };\n };\n\n for (var _iterator = new Set(a)[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {\n var _ret = _loop();\n\n if (_typeof(_ret) === \"object\") return _ret.v;\n }\n } catch (err) {\n _didIteratorError = true;\n _iteratorError = err;\n } finally {\n try {\n if (!_iteratorNormalCompletion && _iterator[\"return\"] != null) {\n _iterator[\"return\"]();\n }\n } finally {\n if (_didIteratorError) {\n throw _iteratorError;\n }\n }\n }\n\n return true;\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isContainedIn = function isContainedIn(a, b) {\n var _iteratorNormalCompletion = true;\n var _didIteratorError = false;\n var _iteratorError = undefined;\n\n try {\n var _loop = function _loop() {\n var v = _step.value;\n if (!b.some(function (e) {\n return e === v;\n }) || a.filter(function (e) {\n return e === v;\n }).length > b.filter(function (e) {\n return e === v;\n }).length) return {\n v: false\n };\n };\n\n for (var _iterator = new Set(a)[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {\n var _ret = _loop();\n\n if (_typeof(_ret) === \"object\") return _ret.v;\n }\n } catch (err) {\n _didIteratorError = true;\n _iteratorError = err;\n } finally {\n try {\n if (!_iteratorNormalCompletion && _iterator[\"return\"] != null) {\n _iterator[\"return\"]();\n }\n } finally {\n if (_didIteratorError) {\n throw _iteratorError;\n }\n }\n }\n\n return true;\n};",
"example": "isContainedIn([1, 4], [2, 4, 1]); // true" "example": "isContainedIn([1, 4], [2, 4, 1]); // true"
}, },
"tags": [ "tags": [
@ -3994,7 +3994,7 @@
"text": "Checks if the given argument is a duplex (readable and writable) stream.\n\nCheck if the value is different from `null`, use `typeof` to check if a value is of type `object` and the `pipe` property is of type `function`.\nAdditionally check if the `typeof` the `_read`, `_write` and `_readableState`, `_writableState` properties are `function` and `object` respectively.\n\n", "text": "Checks if the given argument is a duplex (readable and writable) stream.\n\nCheck if the value is different from `null`, use `typeof` to check if a value is of type `object` and the `pipe` property is of type `function`.\nAdditionally check if the `typeof` the `_read`, `_write` and `_readableState`, `_writableState` properties are `function` and `object` respectively.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const isDuplexStream = val =>\n val !== null &&\n typeof val === 'object' &&\n typeof val.pipe === 'function' &&\n typeof val._read === 'function' &&\n typeof val._readableState === 'object' &&\n typeof val._write === 'function' &&\n typeof val._writableState === 'object';", "es6": "const isDuplexStream = val =>\n val !== null &&\n typeof val === 'object' &&\n typeof val.pipe === 'function' &&\n typeof val._read === 'function' &&\n typeof val._readableState === 'object' &&\n typeof val._write === 'function' &&\n typeof val._writableState === 'object';",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isDuplexStream = function isDuplexStream(val) {\n return val !== null && _typeof(val) === 'object' && typeof val.pipe === 'function' && typeof val._read === 'function' && _typeof(val._readableState) === 'object' && typeof val._write === 'function' && _typeof(val._writableState) === 'object';\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isDuplexStream = function isDuplexStream(val) {\n return val !== null && _typeof(val) === 'object' && typeof val.pipe === 'function' && typeof val._read === 'function' && _typeof(val._readableState) === 'object' && typeof val._write === 'function' && _typeof(val._writableState) === 'object';\n};",
"example": "const Stream = require('stream');\nisDuplexStream(new Stream.Duplex()); // true" "example": "const Stream = require('stream');\nisDuplexStream(new Stream.Duplex()); // true"
}, },
"tags": [ "tags": [
@ -4253,7 +4253,7 @@
"text": "Checks if a value is object-like.\n\nCheck if the provided value is not `null` and its `typeof` is equal to `'object'`.\n\n", "text": "Checks if a value is object-like.\n\nCheck if the provided value is not `null` and its `typeof` is equal to `'object'`.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const isObjectLike = val => val !== null && typeof val === 'object';", "es6": "const isObjectLike = val => val !== null && typeof val === 'object';",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isObjectLike = function isObjectLike(val) {\n return val !== null && _typeof(val) === 'object';\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isObjectLike = function isObjectLike(val) {\n return val !== null && _typeof(val) === 'object';\n};",
"example": "isObjectLike({}); // true\nisObjectLike([1, 2, 3]); // true\nisObjectLike(x => x); // false\nisObjectLike(null); // false" "example": "isObjectLike({}); // true\nisObjectLike([1, 2, 3]); // true\nisObjectLike(x => x); // false\nisObjectLike(null); // false"
}, },
"tags": [ "tags": [
@ -4304,7 +4304,7 @@
"text": "Checks if the provided value is an object created by the Object constructor.\n\nCheck if the provided value is truthy, use `typeof` to check if it is an object and `Object.constructor` to make sure the constructor is equal to `Object`.\n\n", "text": "Checks if the provided value is an object created by the Object constructor.\n\nCheck if the provided value is truthy, use `typeof` to check if it is an object and `Object.constructor` to make sure the constructor is equal to `Object`.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const isPlainObject = val => !!val && typeof val === 'object' && val.constructor === Object;", "es6": "const isPlainObject = val => !!val && typeof val === 'object' && val.constructor === Object;",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isPlainObject = function isPlainObject(val) {\n return !!val && _typeof(val) === 'object' && val.constructor === Object;\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isPlainObject = function isPlainObject(val) {\n return !!val && _typeof(val) === 'object' && val.constructor === Object;\n};",
"example": "isPlainObject({ a: 1 }); // true\nisPlainObject(new Map()); // false" "example": "isPlainObject({ a: 1 }); // true\nisPlainObject(new Map()); // false"
}, },
"tags": [ "tags": [
@ -4409,7 +4409,7 @@
"text": "Returns `true` if an object looks like a [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise), `false` otherwise.\n\nCheck if the object is not `null`, its `typeof` matches either `object` or `function` and if it has a `.then` property, which is also a `function`.\n\n", "text": "Returns `true` if an object looks like a [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise), `false` otherwise.\n\nCheck if the object is not `null`, its `typeof` matches either `object` or `function` and if it has a `.then` property, which is also a `function`.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const isPromiseLike = obj =>\n obj !== null &&\n (typeof obj === 'object' || typeof obj === 'function') &&\n typeof obj.then === 'function';", "es6": "const isPromiseLike = obj =>\n obj !== null &&\n (typeof obj === 'object' || typeof obj === 'function') &&\n typeof obj.then === 'function';",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isPromiseLike = function isPromiseLike(obj) {\n return obj !== null && (_typeof(obj) === 'object' || typeof obj === 'function') && typeof obj.then === 'function';\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isPromiseLike = function isPromiseLike(obj) {\n return obj !== null && (_typeof(obj) === 'object' || typeof obj === 'function') && typeof obj.then === 'function';\n};",
"example": "isPromiseLike({\n then: function() {\n return '';\n }\n}); // true\nisPromiseLike(null); // false\nisPromiseLike({}); // false" "example": "isPromiseLike({\n then: function() {\n return '';\n }\n}); // true\nisPromiseLike(null); // false\nisPromiseLike({}); // false"
}, },
"tags": [ "tags": [
@ -4436,7 +4436,7 @@
"text": "Checks if the given argument is a readable stream.\n\nCheck if the value is different from `null`, use `typeof` to check if the value is of type `object` and the `pipe` property is of type `function`.\nAdditionally check if the `typeof` the `_read` and `_readableState` properties are `function` and `object` respectively.\n\n", "text": "Checks if the given argument is a readable stream.\n\nCheck if the value is different from `null`, use `typeof` to check if the value is of type `object` and the `pipe` property is of type `function`.\nAdditionally check if the `typeof` the `_read` and `_readableState` properties are `function` and `object` respectively.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const isReadableStream = val =>\n val !== null &&\n typeof val === 'object' &&\n typeof val.pipe === 'function' &&\n typeof val._read === 'function' &&\n typeof val._readableState === 'object';", "es6": "const isReadableStream = val =>\n val !== null &&\n typeof val === 'object' &&\n typeof val.pipe === 'function' &&\n typeof val._read === 'function' &&\n typeof val._readableState === 'object';",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isReadableStream = function isReadableStream(val) {\n return val !== null && _typeof(val) === 'object' && typeof val.pipe === 'function' && typeof val._read === 'function' && _typeof(val._readableState) === 'object';\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isReadableStream = function isReadableStream(val) {\n return val !== null && _typeof(val) === 'object' && typeof val.pipe === 'function' && typeof val._read === 'function' && _typeof(val._readableState) === 'object';\n};",
"example": "const fs = require('fs');\nisReadableStream(fs.createReadStream('test.txt')); // true" "example": "const fs = require('fs');\nisReadableStream(fs.createReadStream('test.txt')); // true"
}, },
"tags": [ "tags": [
@ -4513,7 +4513,7 @@
"text": "Checks if the given argument is a stream.\n\nCheck if the value is different from `null`, use `typeof` to check if the value is of type `object` and the `pipe` property is of type `function`.\n\n", "text": "Checks if the given argument is a stream.\n\nCheck if the value is different from `null`, use `typeof` to check if the value is of type `object` and the `pipe` property is of type `function`.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const isStream = val => val !== null && typeof val === 'object' && typeof val.pipe === 'function';", "es6": "const isStream = val => val !== null && typeof val === 'object' && typeof val.pipe === 'function';",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isStream = function isStream(val) {\n return val !== null && _typeof(val) === 'object' && typeof val.pipe === 'function';\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isStream = function isStream(val) {\n return val !== null && _typeof(val) === 'object' && typeof val.pipe === 'function';\n};",
"example": "const fs = require('fs');\nisStream(fs.createReadStream('test.txt')); // true" "example": "const fs = require('fs');\nisStream(fs.createReadStream('test.txt')); // true"
}, },
"tags": [ "tags": [
@ -4565,7 +4565,7 @@
"text": "Checks if the given argument is a symbol.\n\nUse `typeof` to check if a value is classified as a symbol primitive.\n\n", "text": "Checks if the given argument is a symbol.\n\nUse `typeof` to check if a value is classified as a symbol primitive.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const isSymbol = val => typeof val === 'symbol';", "es6": "const isSymbol = val => typeof val === 'symbol';",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isSymbol = function isSymbol(val) {\n return _typeof(val) === 'symbol';\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isSymbol = function isSymbol(val) {\n return _typeof(val) === 'symbol';\n};",
"example": "isSymbol(Symbol('x')); // true" "example": "isSymbol(Symbol('x')); // true"
}, },
"tags": [ "tags": [
@ -4742,7 +4742,7 @@
"text": "Checks if the given argument is a writable stream.\n\nCheck if the value is different from `null`, use `typeof` to check if the value is of type `object` and the `pipe` property is of type `function`.\nAdditionally check if the `typeof` the `_write` and `_writableState` properties are `function` and `object` respectively.\n\n", "text": "Checks if the given argument is a writable stream.\n\nCheck if the value is different from `null`, use `typeof` to check if the value is of type `object` and the `pipe` property is of type `function`.\nAdditionally check if the `typeof` the `_write` and `_writableState` properties are `function` and `object` respectively.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const isWritableStream = val =>\n val !== null &&\n typeof val === 'object' &&\n typeof val.pipe === 'function' &&\n typeof val._write === 'function' &&\n typeof val._writableState === 'object';", "es6": "const isWritableStream = val =>\n val !== null &&\n typeof val === 'object' &&\n typeof val.pipe === 'function' &&\n typeof val._write === 'function' &&\n typeof val._writableState === 'object';",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isWritableStream = function isWritableStream(val) {\n return val !== null && _typeof(val) === 'object' && typeof val.pipe === 'function' && typeof val._write === 'function' && _typeof(val._writableState) === 'object';\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar isWritableStream = function isWritableStream(val) {\n return val !== null && _typeof(val) === 'object' && typeof val.pipe === 'function' && typeof val._write === 'function' && _typeof(val._writableState) === 'object';\n};",
"example": "const fs = require('fs');\nisWritableStream(fs.createWriteStream('test.txt')); // true" "example": "const fs = require('fs');\nisWritableStream(fs.createWriteStream('test.txt')); // true"
}, },
"tags": [ "tags": [
@ -4767,7 +4767,7 @@
"fileName": "join.md", "fileName": "join.md",
"text": "Joins all elements of an array into a string and returns this string.\nUses a separator and an end separator.\n\nUse `Array.prototype.reduce()` to combine elements into a string.\nOmit the second argument, `separator`, to use a default separator of `','`.\nOmit the third argument, `end`, to use the same value as `separator` by default.\n\n", "text": "Joins all elements of an array into a string and returns this string.\nUses a separator and an end separator.\n\nUse `Array.prototype.reduce()` to combine elements into a string.\nOmit the second argument, `separator`, to use a default separator of `','`.\nOmit the third argument, `end`, to use the same value as `separator` by default.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const join = (arr, separator = ',', end = separator) =>\n arr.reduce(\n (acc, val, i) =>\n i === arr.length - 2\n ? acc + val + end\n : i === arr.length - 1\n ? acc + val\n : acc + val + separator,\n ''\n );", "es6": "const join = (arr, separator = ',', end = separator) =>\n arr.reduce(\n (acc, val, i) =>\n i === arr.length - 2\n ? acc + val + end\n : i === arr.length - 1\n ? acc + val\n : acc + val + separator,\n ''\n );",
"es5": "var join = function join(arr) {\n var separator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : ',';\n var end = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : separator;\n return arr.reduce(function (acc, val, i) {\n return i === arr.length - 2 ? acc + val + end : i === arr.length - 1 ? acc + val : acc + val + separator;\n }, '');\n};", "es5": "var join = function join(arr) {\n var separator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : ',';\n var end = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : separator;\n return arr.reduce(function (acc, val, i) {\n return i === arr.length - 2 ? acc + val + end : i === arr.length - 1 ? acc + val : acc + val + separator;\n }, '');\n};",
"example": "join(['pen', 'pineapple', 'apple', 'pen'], ',', '&'); // \"pen,pineapple,apple&pen\"\njoin(['pen', 'pineapple', 'apple', 'pen'], ','); // \"pen,pineapple,apple,pen\"\njoin(['pen', 'pineapple', 'apple', 'pen']); // \"pen,pineapple,apple,pen\"" "example": "join(['pen', 'pineapple', 'apple', 'pen'], ',', '&'); // \"pen,pineapple,apple&pen\"\njoin(['pen', 'pineapple', 'apple', 'pen'], ','); // \"pen,pineapple,apple,pen\"\njoin(['pen', 'pineapple', 'apple', 'pen']); // \"pen,pineapple,apple,pen\""
}, },
@ -4777,10 +4777,10 @@
] ]
}, },
"meta": { "meta": {
"hash": "3db3faac666ee61ab86c70766d2ab5d1293ffd818da87edb971bfff7a366364a", "hash": "362fddaa6244404741e84bca6fc442a101fdb642af53b299e8b9994d0d7162d8",
"firstSeen": "1514801920", "firstSeen": "1514801920",
"lastUpdated": "1583442609", "lastUpdated": "1583481673",
"updateCount": 74, "updateCount": 75,
"authorCount": 7 "authorCount": 7
} }
}, },
@ -5700,7 +5700,7 @@
"fileName": "objectToQueryString.md", "fileName": "objectToQueryString.md",
"text": "Returns a query string generated from the key-value pairs of the given object.\n\nUse `Array.prototype.reduce()` on `Object.entries(queryParameters)` to create the query string.\nDetermine the `symbol` to be either `?` or `&` based on the `length` of `queryString` and concatenate `val` to `queryString` only if it's a string.\nReturn the `queryString` or an empty string when the `queryParameters` are falsy.\n\n", "text": "Returns a query string generated from the key-value pairs of the given object.\n\nUse `Array.prototype.reduce()` on `Object.entries(queryParameters)` to create the query string.\nDetermine the `symbol` to be either `?` or `&` based on the `length` of `queryString` and concatenate `val` to `queryString` only if it's a string.\nReturn the `queryString` or an empty string when the `queryParameters` are falsy.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const objectToQueryString = queryParameters => {\n return queryParameters\n ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {\n const symbol = queryString.length === 0 ? '?' : '&';\n queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';\n return queryString;\n }, '')\n : '';\n};", "es6": "const objectToQueryString = queryParameters => {\n return queryParameters\n ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {\n const symbol = queryString.length === 0 ? '?' : '&';\n queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';\n return queryString;\n }, '')\n : '';\n};",
"es5": "function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }\n\nfunction _nonIterableRest() { throw new TypeError(\"Invalid attempt to destructure non-iterable instance\"); }\n\nfunction _iterableToArrayLimit(arr, i) { if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === \"[object Arguments]\")) { return; } var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i[\"return\"] != null) _i[\"return\"](); } finally { if (_d) throw _e; } } return _arr; }\n\nfunction _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }\n\nvar objectToQueryString = function objectToQueryString(queryParameters) {\n return queryParameters ? Object.entries(queryParameters).reduce(function (queryString, _ref, index) {\n var _ref2 = _slicedToArray(_ref, 2),\n key = _ref2[0],\n val = _ref2[1];\n\n var symbol = queryString.length === 0 ? '?' : '&';\n queryString += typeof val === 'string' ? \"\".concat(symbol).concat(key, \"=\").concat(val) : '';\n return queryString;\n }, '') : '';\n};", "es5": "function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _nonIterableRest(); }\n\nfunction _nonIterableRest() { throw new TypeError(\"Invalid attempt to destructure non-iterable instance\"); }\n\nfunction _iterableToArrayLimit(arr, i) { if (!(Symbol.iterator in Object(arr) || Object.prototype.toString.call(arr) === \"[object Arguments]\")) { return; } var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i[\"return\"] != null) _i[\"return\"](); } finally { if (_d) throw _e; } } return _arr; }\n\nfunction _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }\n\nvar objectToQueryString = function objectToQueryString(queryParameters) {\n return queryParameters ? Object.entries(queryParameters).reduce(function (queryString, _ref, index) {\n var _ref2 = _slicedToArray(_ref, 2),\n key = _ref2[0],\n val = _ref2[1];\n\n var symbol = queryString.length === 0 ? '?' : '&';\n queryString += typeof val === 'string' ? \"\".concat(symbol).concat(key, \"=\").concat(val) : '';\n return queryString;\n }, '') : '';\n};",
"example": "objectToQueryString({ page: '1', size: '2kg', key: undefined }); // '?page=1&size=2kg'" "example": "objectToQueryString({ page: '1', size: '2kg', key: undefined }); // '?page=1&size=2kg'"
}, },
@ -5712,10 +5712,10 @@
] ]
}, },
"meta": { "meta": {
"hash": "e8f820ce6da97eabde082ffb829c9fb700e85efc79bdebe883c67237269e3f52", "hash": "b031c3387ef66411ab5d295788eac4247ada5b4b068dda90603d3c973890bc26",
"firstSeen": "1570824965", "firstSeen": "1570824965",
"lastUpdated": "1583442609", "lastUpdated": "1583481673",
"updateCount": 41, "updateCount": 42,
"authorCount": 4 "authorCount": 4
} }
}, },
@ -6269,7 +6269,7 @@
"codeBlocks": { "codeBlocks": {
"es6": "const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Promise.resolve(arg));", "es6": "const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Promise.resolve(arg));",
"es5": "var pipeAsyncFunctions = function pipeAsyncFunctions() {\n for (var _len = arguments.length, fns = new Array(_len), _key = 0; _key < _len; _key++) {\n fns[_key] = arguments[_key];\n }\n\n return function (arg) {\n return fns.reduce(function (p, f) {\n return p.then(f);\n }, Promise.resolve(arg));\n };\n};", "es5": "var pipeAsyncFunctions = function pipeAsyncFunctions() {\n for (var _len = arguments.length, fns = new Array(_len), _key = 0; _key < _len; _key++) {\n fns[_key] = arguments[_key];\n }\n\n return function (arg) {\n return fns.reduce(function (p, f) {\n return p.then(f);\n }, Promise.resolve(arg));\n };\n};",
"example": "const sum = pipeAsyncFunctions(\n x => x + 1,\n x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)),\n x => x + 3,\n async x => (await x) + 4\n);\n(async () => {\n console.log(await sum(5)); // 15 (after one second)\n})();" "example": "const sum = pipeAsyncFunctions(\n x => x + 1,\n x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)),\n x => x + 3,\n async x => (await x) + 4\n);\n(async() => {\n console.log(await sum(5)); // 15 (after one second)\n})();"
}, },
"tags": [ "tags": [
"function", "function",
@ -6278,10 +6278,10 @@
] ]
}, },
"meta": { "meta": {
"hash": "a2b9ac4f1209c3791caa6f40f0d041acd75514e9ee8909f2e3833635f357c0bd", "hash": "0eb844801e767edcaa6a882a6dce4b5b1dadecb53a92d6ec259d36c57b6a3dd0",
"firstSeen": "1517069864", "firstSeen": "1517069864",
"lastUpdated": "1583442609", "lastUpdated": "1583481673",
"updateCount": 99, "updateCount": 100,
"authorCount": 5 "authorCount": 5
} }
}, },
@ -6319,7 +6319,7 @@
"text": "Returns the singular or plural form of the word based on the input number. If the first argument is an `object`, it will use a closure by returning a function that can auto-pluralize words that don't simply end in `s` if the supplied dictionary contains the word.\n\nIf `num` is either `-1` or `1`, return the singular form of the word. If `num` is any other number, return the plural form. Omit the third argument to use the default of the singular word + `s`, or supply a custom pluralized word when necessary. If the first argument is an `object`, utilize a closure by returning a function which can use the supplied dictionary to resolve the correct plural form of the word.\n\n", "text": "Returns the singular or plural form of the word based on the input number. If the first argument is an `object`, it will use a closure by returning a function that can auto-pluralize words that don't simply end in `s` if the supplied dictionary contains the word.\n\nIf `num` is either `-1` or `1`, return the singular form of the word. If `num` is any other number, return the plural form. Omit the third argument to use the default of the singular word + `s`, or supply a custom pluralized word when necessary. If the first argument is an `object`, utilize a closure by returning a function which can use the supplied dictionary to resolve the correct plural form of the word.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const pluralize = (val, word, plural = word + 's') => {\n const _pluralize = (num, word, plural = word + 's') =>\n [1, -1].includes(Number(num)) ? word : plural;\n if (typeof val === 'object') return (num, word) => _pluralize(num, word, val[word]);\n return _pluralize(val, word, plural);\n};", "es6": "const pluralize = (val, word, plural = word + 's') => {\n const _pluralize = (num, word, plural = word + 's') =>\n [1, -1].includes(Number(num)) ? word : plural;\n if (typeof val === 'object') return (num, word) => _pluralize(num, word, val[word]);\n return _pluralize(val, word, plural);\n};",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar pluralize = function pluralize(val, word) {\n var plural = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : word + 's';\n\n var _pluralize = function _pluralize(num, word) {\n var plural = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : word + 's';\n return [1, -1].includes(Number(num)) ? word : plural;\n };\n\n if (_typeof(val) === 'object') return function (num, word) {\n return _pluralize(num, word, val[word]);\n };\n return _pluralize(val, word, plural);\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar pluralize = function pluralize(val, word) {\n var plural = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : word + 's';\n\n var _pluralize = function _pluralize(num, word) {\n var plural = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : word + 's';\n return [1, -1].includes(Number(num)) ? word : plural;\n };\n\n if (_typeof(val) === 'object') return function (num, word) {\n return _pluralize(num, word, val[word]);\n };\n return _pluralize(val, word, plural);\n};",
"example": "pluralize(0, 'apple'); // 'apples'\npluralize(1, 'apple'); // 'apple'\npluralize(2, 'apple'); // 'apples'\npluralize(2, 'person', 'people'); // 'people'\n\nconst PLURALS = {\n person: 'people',\n radius: 'radii'\n};\nconst autoPluralize = pluralize(PLURALS);\nautoPluralize(2, 'person'); // 'people'" "example": "pluralize(0, 'apple'); // 'apples'\npluralize(1, 'apple'); // 'apple'\npluralize(2, 'apple'); // 'apples'\npluralize(2, 'person', 'people'); // 'people'\n\nconst PLURALS = {\n person: 'people',\n radius: 'radii'\n};\nconst autoPluralize = pluralize(PLURALS);\nautoPluralize(2, 'person'); // 'people'"
}, },
"tags": [ "tags": [
@ -6611,7 +6611,7 @@
}, },
"meta": { "meta": {
"hash": "42788f8392f5511db3641dbe2ab92b2c043b3b5209e95c386c73e5d96eaa63af", "hash": "42788f8392f5511db3641dbe2ab92b2c043b3b5209e95c386c73e5d96eaa63af",
"firstSeen": "1514383576\n1514119161", "firstSeen": "1514383576\n",
"lastUpdated": "1565681352", "lastUpdated": "1565681352",
"updateCount": 22, "updateCount": 22,
"authorCount": 10 "authorCount": 10
@ -6912,7 +6912,7 @@
"fileName": "remove.md", "fileName": "remove.md",
"text": "Removes elements from an array for which the given function returns `false`.\n\nUse `Array.prototype.filter()` to find array elements that return truthy values and `Array.prototype.reduce()` to remove elements using `Array.prototype.splice()`.\nThe `func` is invoked with three arguments (`value, index, array`).\n\n", "text": "Removes elements from an array for which the given function returns `false`.\n\nUse `Array.prototype.filter()` to find array elements that return truthy values and `Array.prototype.reduce()` to remove elements using `Array.prototype.splice()`.\nThe `func` is invoked with three arguments (`value, index, array`).\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const remove = (arr, func) =>\n Array.isArray(arr)\n ? arr.filter(func).reduce((acc, val) => {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, [])\n : [];", "es6": "const remove = (arr, func) =>\n Array.isArray(arr)\n ? arr.filter(func).reduce((acc, val) => {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, [])\n : [];",
"es5": "var remove = function remove(arr, func) {\n return Array.isArray(arr) ? arr.filter(func).reduce(function (acc, val) {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, []) : [];\n};", "es5": "var remove = function remove(arr, func) {\n return Array.isArray(arr) ? arr.filter(func).reduce(function (acc, val) {\n arr.splice(arr.indexOf(val), 1);\n return acc.concat(val);\n }, []) : [];\n};",
"example": "remove([1, 2, 3, 4], n => n % 2 === 0); // [2, 4]" "example": "remove([1, 2, 3, 4], n => n % 2 === 0); // [2, 4]"
}, },
@ -6922,10 +6922,10 @@
] ]
}, },
"meta": { "meta": {
"hash": "c1542907e6295eb81df918174c247a65d73c8daccc56769f2eb32d609b7846fc", "hash": "069472d018c3102412dafc2ae8ec6e9396e53c01d0073079f2e3f1ac3c99b6e9",
"firstSeen": "1513521691", "firstSeen": "1513521691",
"lastUpdated": "1583442609", "lastUpdated": "1583481673",
"updateCount": 95, "updateCount": 96,
"authorCount": 6 "authorCount": 6
} }
}, },
@ -7426,8 +7426,8 @@
"fileName": "size.md", "fileName": "size.md",
"text": "Gets the size of an array, object or string.\n\nGet type of `val` (`array`, `object` or `string`). \nUse `length` property for arrays.\nUse `length` or `size` value if available or number of keys for objects.\nUse `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `val` for strings.\nSplit strings into array of characters with `split('')` and return its length.\n\n", "text": "Gets the size of an array, object or string.\n\nGet type of `val` (`array`, `object` or `string`). \nUse `length` property for arrays.\nUse `length` or `size` value if available or number of keys for objects.\nUse `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API/Blob) created from `val` for strings.\nSplit strings into array of characters with `split('')` and return its length.\n\n",
"codeBlocks": { "codeBlocks": {
"es6": "const size = val =>\n Array.isArray(val)\n ? val.length\n : val && typeof val === 'object'\n ? val.size || val.length || Object.keys(val).length\n : typeof val === 'string'\n ? new Blob([val]).size\n : 0;", "es6": "const size = val =>\n Array.isArray(val)\n ? val.length\n : val && typeof val === 'object'\n ? val.size || val.length || Object.keys(val).length\n : typeof val === 'string'\n ? new Blob([val]).size\n : 0;",
"es5": "function _typeof(obj) { if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar size = function size(val) {\n return Array.isArray(val) ? val.length : val && _typeof(val) === 'object' ? val.size || val.length || Object.keys(val).length : typeof val === 'string' ? new Blob([val]).size : 0;\n};", "es5": "function _typeof(obj) { \"@babel/helpers - typeof\"; if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj; }; } return _typeof(obj); }\n\nvar size = function size(val) {\n return Array.isArray(val) ? val.length : val && _typeof(val) === 'object' ? val.size || val.length || Object.keys(val).length : typeof val === 'string' ? new Blob([val]).size : 0;\n};",
"example": "size([1, 2, 3, 4, 5]); // 5\nsize('size'); // 4\nsize({ one: 1, two: 2, three: 3 }); // 3" "example": "size([1, 2, 3, 4, 5]); // 5\nsize('size'); // 4\nsize({ one: 1, two: 2, three: 3 }); // 3"
}, },
"tags": [ "tags": [
@ -7438,10 +7438,10 @@
] ]
}, },
"meta": { "meta": {
"hash": "6dd4c6a51d2c80fa4768c95ae01c16a8359c4140bcad28c7fde0cecd72d7d3e2", "hash": "24b93b68a59b49f245590930fed6fb82e286ce09f90e292466cde63c1784c347",
"firstSeen": "1514645161", "firstSeen": "1514645161",
"lastUpdated": "1583442609", "lastUpdated": "1583481673",
"updateCount": 40, "updateCount": 41,
"authorCount": 5 "authorCount": 5
} }
}, },
@ -8009,7 +8009,7 @@
}, },
"meta": { "meta": {
"hash": "4c83bc03b1146f6a9f49f12855a4118dd32367b6b6d46e64e94959404411e823", "hash": "4c83bc03b1146f6a9f49f12855a4118dd32367b6b6d46e64e94959404411e823",
"firstSeen": "1513526151\n1513296010", "firstSeen": "1513526151\n",
"lastUpdated": "1565681352", "lastUpdated": "1565681352",
"updateCount": 9, "updateCount": 9,
"authorCount": 6 "authorCount": 6
@ -8289,7 +8289,7 @@
}, },
"meta": { "meta": {
"hash": "0981cb8583c317d56894840bb31fd83e820b56fd7eef18d96db1edcb0a222860", "hash": "0981cb8583c317d56894840bb31fd83e820b56fd7eef18d96db1edcb0a222860",
"firstSeen": "1514034916\n1513962891", "firstSeen": "1514034916\n",
"lastUpdated": "1565681352", "lastUpdated": "1565681352",
"updateCount": 15, "updateCount": 15,
"authorCount": 8 "authorCount": 8
@ -9114,7 +9114,7 @@
}, },
"meta": { "meta": {
"hash": "54f15178f6196172218aeffd14defe4e9af475ee3e29f0857ada823f618d3c8f", "hash": "54f15178f6196172218aeffd14defe4e9af475ee3e29f0857ada823f618d3c8f",
"firstSeen": "1513521691\n1513323330", "firstSeen": "1513521691\n",
"lastUpdated": "1565952466", "lastUpdated": "1565952466",
"updateCount": 12, "updateCount": 12,
"authorCount": 7 "authorCount": 7

5
snippets/deepClone.md
View File

@ -11,6 +11,7 @@ Use `Object.assign()` and an empty object (`{}`) to create a shallow clone of th
Use `Object.keys()` and `Array.prototype.forEach()` to determine which key-value pairs need to be deep cloned. Use `Object.keys()` and `Array.prototype.forEach()` to determine which key-value pairs need to be deep cloned.
```js ```js
const deepClone = obj => { const deepClone = obj => {
if (obj === null) return null; if (obj === null) return null;
let clone = Object.assign({}, obj); let clone = Object.assign({}, obj);
@ -20,8 +21,8 @@ const deepClone = obj => {
return Array.isArray(obj) && obj.length return Array.isArray(obj) && obj.length
? (clone.length = obj.length) && Array.from(clone) ? (clone.length = obj.length) && Array.from(clone)
: Array.isArray(obj) : Array.isArray(obj)
? Array.from(obj) ? Array.from(obj)
: clone; : clone;
}; };
``` ```

5
snippets/deepMapKeys.md
View File

@ -10,17 +10,18 @@ Use `Object.keys(obj)` to iterate over the object's keys.
Use `Array.prototype.reduce()` to create a new object with the same values and mapped keys using `fn`. Use `Array.prototype.reduce()` to create a new object with the same values and mapped keys using `fn`.
```js ```js
const deepMapKeys = (obj, f) => const deepMapKeys = (obj, f) =>
Array.isArray(obj) Array.isArray(obj)
? obj.map(val => deepMapKeys(val, f)) ? obj.map(val => deepMapKeys(val, f))
: typeof obj === 'object' : typeof obj === 'object'
? Object.keys(obj).reduce((acc, current) => { ? Object.keys(obj).reduce((acc, current) => {
const val = obj[current]; const val = obj[current];
acc[f(current)] = acc[f(current)] =
val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val); val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);
return acc; return acc;
}, {}) }, {})
: obj; : obj;
``` ```
```js ```js

7
snippets/dig.md
View File

@ -9,14 +9,13 @@ Use the `in` operator to check if `target` exists in `obj`.
If found, return the value of `obj[target]`, otherwise use `Object.values(obj)` and `Array.prototype.reduce()` to recursively call `dig` on each nested object until the first matching key/value pair is found. If found, return the value of `obj[target]`, otherwise use `Object.values(obj)` and `Array.prototype.reduce()` to recursively call `dig` on each nested object until the first matching key/value pair is found.
```js ```js
const dig = (obj, target) => const dig = (obj, target) =>
target in obj target in obj
? obj[target] ? obj[target]
: Object.values(obj).reduce((acc, val) => { : Object.values(obj).reduce((acc, val) => {
if (acc !== undefined) return acc; if (acc !== undefined) return acc;
if (typeof val === 'object') return dig(val, target); if (typeof val === 'object') return dig(val, target);
}, undefined); }, undefined);
``` ```
```js ```js

9
snippets/factorial.md
View File

@ -11,15 +11,14 @@ Otherwise, return the product of `n` and the factorial of `n - 1`.
Throws an exception if `n` is a negative number. Throws an exception if `n` is a negative number.
```js ```js
const factorial = n => const factorial = n =>
n < 0 n < 0
? (() => { ? (() => {
throw new TypeError('Negative numbers are not allowed!'); throw new TypeError('Negative numbers are not allowed!');
})() })()
: n <= 1 : n <= 1
? 1 ? 1
: n * factorial(n - 1); : n * factorial(n - 1);
``` ```
```js ```js

9
snippets/getMeridiemSuffixOfInteger.md
View File

@ -8,15 +8,14 @@ Converts an integer to a suffixed string, adding `am` or `pm` based on its value
Use the modulo operator (`%`) and conditional checks to transform an integer to a stringified 12-hour format with meridiem suffix. Use the modulo operator (`%`) and conditional checks to transform an integer to a stringified 12-hour format with meridiem suffix.
```js ```js
const getMeridiemSuffixOfInteger = num => const getMeridiemSuffixOfInteger = num =>
num === 0 || num === 24 num === 0 || num === 24
? 12 + 'am' ? 12 + 'am'
: num === 12 : num === 12
? 12 + 'pm' ? 12 + 'pm'
: num < 12 : num < 12
? (num % 12) + 'am' ? (num % 12) + 'am'
: (num % 12) + 'pm'; : (num % 12) + 'pm';
``` ```
```js ```js

5
snippets/join.md
View File

@ -11,14 +11,15 @@ Omit the second argument, `separator`, to use a default separator of `','`.
Omit the third argument, `end`, to use the same value as `separator` by default. Omit the third argument, `end`, to use the same value as `separator` by default.
```js ```js
const join = (arr, separator = ',', end = separator) => const join = (arr, separator = ',', end = separator) =>
arr.reduce( arr.reduce(
(acc, val, i) => (acc, val, i) =>
i === arr.length - 2 i === arr.length - 2
? acc + val + end ? acc + val + end
: i === arr.length - 1 : i === arr.length - 1
? acc + val ? acc + val
: acc + val + separator, : acc + val + separator,
'' ''
); );
``` ```

9
snippets/objectToQueryString.md
View File

@ -10,13 +10,14 @@ Determine the `symbol` to be either `?` or `&` based on the `length` of `querySt
Return the `queryString` or an empty string when the `queryParameters` are falsy. Return the `queryString` or an empty string when the `queryParameters` are falsy.
```js ```js
const objectToQueryString = queryParameters => { const objectToQueryString = queryParameters => {
return queryParameters return queryParameters
? Object.entries(queryParameters).reduce((queryString, [key, val], index) => { ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {
const symbol = queryString.length === 0 ? '?' : '&'; const symbol = queryString.length === 0 ? '?' : '&';
queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : ''; queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';
return queryString; return queryString;
}, '') }, '')
: ''; : '';
}; };
``` ```

3
snippets/pipeAsyncFunctions.md
View File

@ -14,13 +14,14 @@ const pipeAsyncFunctions = (...fns) => arg => fns.reduce((p, f) => p.then(f), Pr
``` ```
```js ```js
const sum = pipeAsyncFunctions( const sum = pipeAsyncFunctions(
x => x + 1, x => x + 1,
x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)), x => new Promise(resolve => setTimeout(() => resolve(x + 2), 1000)),
x => x + 3, x => x + 3,
async x => (await x) + 4 async x => (await x) + 4
); );
(async () => { (async() => {
console.log(await sum(5)); // 15 (after one second) console.log(await sum(5)); // 15 (after one second)
})(); })();
``` ```

7
snippets/remove.md
View File

@ -9,13 +9,12 @@ Use `Array.prototype.filter()` to find array elements that return truthy values
The `func` is invoked with three arguments (`value, index, array`). The `func` is invoked with three arguments (`value, index, array`).
```js ```js
const remove = (arr, func) => const remove = (arr, func) =>
Array.isArray(arr) Array.isArray(arr)
? arr.filter(func).reduce((acc, val) => { ? arr.filter(func).reduce((acc, val) => {
arr.splice(arr.indexOf(val), 1); arr.splice(arr.indexOf(val), 1);
return acc.concat(val); return acc.concat(val);
}, []) }, [])
: []; : [];
``` ```

9
snippets/size.md
View File

@ -12,14 +12,15 @@ Use `size` of a [`Blob` object](https://developer.mozilla.org/en-US/docs/Web/API
Split strings into array of characters with `split('')` and return its length. Split strings into array of characters with `split('')` and return its length.
```js ```js
const size = val => const size = val =>
Array.isArray(val) Array.isArray(val)
? val.length ? val.length
: val && typeof val === 'object' : val && typeof val === 'object'
? val.size || val.length || Object.keys(val).length ? val.size || val.length || Object.keys(val).length
: typeof val === 'string' : typeof val === 'string'
? new Blob([val]).size ? new Blob([val]).size
: 0; : 0;
``` ```
```js ```js