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30secondsofcode
2019-12-11 18:39:58 +00:00
parent df6abd7ced
commit ad07ba1012
14 changed files with 872 additions and 872 deletions
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100
snippet_data/archivedSnippets.json
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20
snippet_data/snippetList.json
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@ -3416,7 +3416,7 @@
"type": "snippetListing",
"title": "objectToQueryString",
"attributes": {
"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 `index` 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",
"tags": [
"utility",
"object",
@ -3425,7 +3425,7 @@
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1474
snippet_data/snippets.json
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4
snippets/deepClone.md
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@ -20,8 +20,8 @@ const deepClone = obj => {
return Array.isArray(obj) && obj.length
? (clone.length = obj.length) && Array.from(clone)
: Array.isArray(obj)
? Array.from(obj)
: clone;
? Array.from(obj)
: clone;
};
```

4
snippets/deepMapKeys.md
View File

@ -14,13 +14,13 @@ const deepMapKeys = (obj, f) =>
Array.isArray(obj)
? obj.map(val => deepMapKeys(val, f))
: typeof obj === 'object'
? Object.keys(obj).reduce((acc, current) => {
? Object.keys(obj).reduce((acc, current) => {
const val = obj[current];
acc[f(current)] =
val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);
return acc;
}, {})
: obj;
: obj;
```
```js

6
snippets/dig.md
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@ -13,9 +13,9 @@ const dig = (obj, target) =>
target in obj
? obj[target]
: Object.values(obj).reduce((acc, val) => {
if (acc !== undefined) return acc;
if (typeof val === 'object') return dig(val, target);
}, undefined);
if (acc !== undefined) return acc;
if (typeof val === 'object') return dig(val, target);
}, undefined);
```
```js

8
snippets/factorial.md
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@ -14,11 +14,11 @@ Throws an exception if `n` is a negative number.
const factorial = n =>
n < 0
? (() => {
throw new TypeError('Negative numbers are not allowed!');
})()
throw new TypeError('Negative numbers are not allowed!');
})()
: n <= 1
? 1
: n * factorial(n - 1);
? 1
: n * factorial(n - 1);
```
```js

8
snippets/getMeridiemSuffixOfInteger.md
View File

@ -12,10 +12,10 @@ const getMeridiemSuffixOfInteger = num =>
num === 0 || num === 24
? 12 + 'am'
: num === 12
? 12 + 'pm'
: num < 12
? (num % 12) + 'am'
: (num % 12) + 'pm';
? 12 + 'pm'
: num < 12
? (num % 12) + 'am'
: (num % 12) + 'pm';
```
```js

4
snippets/join.md
View File

@ -17,8 +17,8 @@ const join = (arr, separator = ',', end = separator) =>
i === arr.length - 2
? acc + val + end
: i === arr.length - 1
? acc + val
: acc + val + separator,
? acc + val
: acc + val + separator,
''
);
```

8
snippets/objectToQueryString.md
View File

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

3
snippets/pipeAsyncFunctions.md
View File

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

7
snippets/remove.md
View File

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

48
test/_30s.js
View File

@ -199,8 +199,8 @@ const deepClone = obj => {
return Array.isArray(obj) && obj.length
? (clone.length = obj.length) && Array.from(clone)
: Array.isArray(obj)
? Array.from(obj)
: clone;
? Array.from(obj)
: clone;
};
const deepFlatten = arr => [].concat(...arr.map(v => (Array.isArray(v) ? deepFlatten(v) : v)));
const deepFreeze = obj =>
@ -212,13 +212,13 @@ const deepMapKeys = (obj, f) =>
Array.isArray(obj)
? obj.map(val => deepMapKeys(val, f))
: typeof obj === 'object'
? Object.keys(obj).reduce((acc, current) => {
? Object.keys(obj).reduce((acc, current) => {
const val = obj[current];
acc[f(current)] =
val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);
return acc;
}, {})
: obj;
: obj;
const defaults = (obj, ...defs) => Object.assign({}, obj, ...defs.reverse(), obj);
const defer = (fn, ...args) => setTimeout(fn, 1, ...args);
const degreesToRads = deg => (deg * Math.PI) / 180.0;
@ -240,9 +240,9 @@ const dig = (obj, target) =>
target in obj
? obj[target]
: Object.values(obj).reduce((acc, val) => {
if (acc !== undefined) return acc;
if (typeof val === 'object') return dig(val, target);
}, undefined);
if (acc !== undefined) return acc;
if (typeof val === 'object') return dig(val, target);
}, undefined);
const digitize = n => [...`${n}`].map(i => parseInt(i));
const distance = (x0, y0, x1, y1) => Math.hypot(x1 - x0, y1 - y0);
const drop = (arr, n = 1) => arr.slice(n);
@ -314,11 +314,11 @@ const extendHex = shortHex =>
const factorial = n =>
n < 0
? (() => {
throw new TypeError('Negative numbers are not allowed!');
})()
throw new TypeError('Negative numbers are not allowed!');
})()
: n <= 1
? 1
: n * factorial(n - 1);
? 1
: n * factorial(n - 1);
const fibonacci = n =>
Array.from({ length: n }).reduce(
(acc, val, i) => acc.concat(i > 1 ? acc[i - 1] + acc[i - 2] : i),
@ -419,10 +419,10 @@ const getMeridiemSuffixOfInteger = num =>
num === 0 || num === 24
? 12 + 'am'
: num === 12
? 12 + 'pm'
: num < 12
? (num % 12) + 'am'
: (num % 12) + 'pm';
? 12 + 'pm'
: num < 12
? (num % 12) + 'am'
: (num % 12) + 'pm';
const getScrollPosition = (el = window) => ({
x: el.pageXOffset !== undefined ? el.pageXOffset : el.scrollLeft,
y: el.pageYOffset !== undefined ? el.pageYOffset : el.scrollTop
@ -656,8 +656,8 @@ const join = (arr, separator = ',', end = separator) =>
i === arr.length - 2
? acc + val + end
: i === arr.length - 1
? acc + val
: acc + val + separator,
? acc + val
: acc + val + separator,
''
);
const JSONtoCSV = (arr, columns, delimiter = ',') =>
@ -776,10 +776,10 @@ const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
const objectToQueryString = queryParameters => {
return queryParameters
? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {
const symbol = index === 0 ? '?' : '&';
queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';
return queryString;
}, '')
const symbol = queryString.length === 0 ? '?' : '&';
queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';
return queryString;
}, '')
: '';
};
const observeMutations = (element, callback, options) => {
@ -1011,9 +1011,9 @@ const reject = (pred, array) => array.filter((...args) => !pred(...args));
const remove = (arr, func) =>
Array.isArray(arr)
? arr.filter(func).reduce((acc, val) => {
arr.splice(arr.indexOf(val), 1);
return acc.concat(val);
}, [])
arr.splice(arr.indexOf(val), 1);
return acc.concat(val);
}, [])
: [];
const removeNonASCII = str => str.replace(/[^\x20-\x7E]/g, '');
const renameKeys = (keysMap, obj) =>

50
vscode_snippets/snippets.json
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@ -512,8 +512,8 @@
" return Array.isArray(obj) && obj.length",
" ? (clone.length = obj.length) && Array.from(clone)",
" : Array.isArray(obj)",
" ? Array.from(obj)",
" : clone;",
" ? Array.from(obj)",
" : clone;",
"};"
],
"description": "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"
@ -549,13 +549,13 @@
" Array.isArray(obj)",
" ? obj.map(val => deepMapKeys(val, f))",
" : typeof obj === 'object'",
" ? Object.keys(obj).reduce((acc, current) => {",
" ? Object.keys(obj).reduce((acc, current) => {",
" const val = obj[current];",
" acc[f(current)] =",
" val !== null && typeof val === 'object' ? deepMapKeys(val, f) : (acc[f(current)] = val);",
" return acc;",
" }, {})",
" : obj;"
" : obj;"
],
"description": "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"
},
@ -631,9 +631,9 @@
" target in obj",
" ? obj[target]",
" : Object.values(obj).reduce((acc, val) => {",
" if (acc !== undefined) return acc;",
" if (typeof val === 'object') return dig(val, target);",
" }, undefined);"
" if (acc !== undefined) return acc;",
" if (typeof val === 'object') return dig(val, target);",
" }, undefined);"
],
"description": "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"
},
@ -795,11 +795,11 @@
"const factorial = n =>",
" n < 0",
" ? (() => {",
" throw new TypeError('Negative numbers are not allowed!');",
" })()",
" throw new TypeError('Negative numbers are not allowed!');",
" })()",
" : n <= 1",
" ? 1",
" : n * factorial(n - 1);"
" ? 1",
" : n * factorial(n - 1);"
],
"description": "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"
},
@ -1056,10 +1056,10 @@
" num === 0 || num === 24",
" ? 12 + 'am'",
" : num === 12",
" ? 12 + 'pm'",
" : num < 12",
" ? (num % 12) + 'am'",
" : (num % 12) + 'pm';"
" ? 12 + 'pm'",
" : num < 12",
" ? (num % 12) + 'am'",
" : (num % 12) + 'pm';"
],
"description": "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"
},
@ -1743,8 +1743,8 @@
" i === arr.length - 2",
" ? acc + val + end",
" : i === arr.length - 1",
" ? acc + val",
" : acc + val + separator,",
" ? acc + val",
" : acc + val + separator,",
" ''",
" );"
],
@ -2073,14 +2073,14 @@
"const objectToQueryString = queryParameters => {",
" return queryParameters",
" ? Object.entries(queryParameters).reduce((queryString, [key, val], index) => {",
" const symbol = index === 0 ? '?' : '&';",
" queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';",
" return queryString;",
" }, '')",
" const symbol = queryString.length === 0 ? '?' : '&';",
" queryString += typeof val === 'string' ? `${symbol}${key}=${val}` : '';",
" return queryString;",
" }, '')",
" : '';",
"};"
],
"description": "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 `index` and concatenate `val` to `queryString` only if it's a string.\nReturn the `queryString` or an empty string when the `queryParameters` are falsy.\n"
"description": "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"
},
"observeMutations": {
"prefix": "30s_observeMutations",
@ -2590,9 +2590,9 @@
"const remove = (arr, func) =>",
" Array.isArray(arr)",
" ? arr.filter(func).reduce((acc, val) => {",
" arr.splice(arr.indexOf(val), 1);",
" return acc.concat(val);",
" }, [])",
" arr.splice(arr.indexOf(val), 1);",
" return acc.concat(val);",
" }, [])",
" : [];"
],
"description": "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"