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30secondsofcode
2018-08-10 19:56:44 +00:00
parent 06ab879e37
commit 0ea2d452e8
4 changed files with 1625 additions and 1552 deletions
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@ -267,7 +267,7 @@
"fileName": "bind.md",
"text": "Creates a function that invokes `fn` with a given context, optionally adding any additional supplied parameters to the beginning of the arguments.\n\nReturn a `function` that uses `Function.apply()` to apply the given `context` to `fn`.\nUse `Array.concat()` to prepend any additional supplied parameters to the arguments.",
"codeBlocks": [
"const bind = (fn, context, ...args) =>\n function() {\n return fn.apply(context, args.concat(...arguments));\n };",
"const bind = (fn, context, ...boundArgs) => (...args) => fn.apply(context, [...boundArgs, ...args]);",
"function greet(greeting, punctuation) {\n return greeting + ' ' + this.user + punctuation;\n}\nconst freddy = { user: 'fred' };\nconst freddyBound = bind(greet, freddy);\nconsole.log(freddyBound('hi', '!')); // 'hi fred!'"
],
"tags": [
@ -277,7 +277,7 @@
},
"meta": {
"archived": false,
"hash": "e9d5d908df4751e5765b1e7d5a5f883261bdfad521b01023a81d616cac3b3cc1"
"hash": "4909c73d0435a32df36abef06a58c21362ed3991aedc95421516a5d0ea83264a"
}
},
{
@ -305,9 +305,9 @@
"type": "snippet",
"attributes": {
"fileName": "bindKey.md",
"text": "Creates a function that invokes the method at a given key of an object, optionally adding any additional supplied parameters to the beginning of the arguments.\n\nReturn a `function` that uses `Function.apply()` to bind `context[fn]` to `context`.\nUse `Array.concat()` to prepend any additional supplied parameters to the arguments.",
"text": "Creates a function that invokes the method at a given key of an object, optionally adding any additional supplied parameters to the beginning of the arguments.\n\nReturn a `function` that uses `Function.apply()` to bind `context[fn]` to `context`.\nUse the spread operator (`...`) to prepend any additional supplied parameters to the arguments.",
"codeBlocks": [
"const bindKey = (context, fn, ...args) =>\n function() {\n return context[fn].apply(context, args.concat(...arguments));\n };",
"const bindKey = (context, fn, ...boundArgs) => (...args) =>\n context[fn].apply(context, [...boundArgs, ...args]);",
"const freddy = {\n user: 'fred',\n greet: function(greeting, punctuation) {\n return greeting + ' ' + this.user + punctuation;\n }\n};\nconst freddyBound = bindKey(freddy, 'greet');\nconsole.log(freddyBound('hi', '!')); // 'hi fred!'"
],
"tags": [
@ -317,7 +317,7 @@
},
"meta": {
"archived": false,
"hash": "561c7894f3ca7df0b3874ea749320b7d97eb3118c07c2636f4c4215377697927"
"hash": "cfbb9759a71b09d9351a02f39f828578290e389aeb5390ce760957ee43be0297"
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