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node_modules/es5-ext/array/from/shim.js
| 119 lines
| 3.1 KiB
| application/javascript
| JavascriptLexer
|
| r789 | "use strict"; | |||
| var iteratorSymbol = require("es6-symbol").iterator | ||||
| , isArguments = require("../../function/is-arguments") | ||||
| , isFunction = require("../../function/is-function") | ||||
| , toPosInt = require("../../number/to-pos-integer") | ||||
| , callable = require("../../object/valid-callable") | ||||
| , validValue = require("../../object/valid-value") | ||||
| , isValue = require("../../object/is-value") | ||||
| , isString = require("../../string/is-string") | ||||
| , isArray = Array.isArray | ||||
| , call = Function.prototype.call | ||||
| , desc = { configurable: true, enumerable: true, writable: true, value: null } | ||||
| , defineProperty = Object.defineProperty; | ||||
| // eslint-disable-next-line complexity, max-lines-per-function | ||||
| module.exports = function (arrayLike/*, mapFn, thisArg*/) { | ||||
| var mapFn = arguments[1] | ||||
| , thisArg = arguments[2] | ||||
| , Context | ||||
| , i | ||||
| , j | ||||
| , arr | ||||
| , length | ||||
| , code | ||||
| , iterator | ||||
| , result | ||||
| , getIterator | ||||
| , value; | ||||
| arrayLike = Object(validValue(arrayLike)); | ||||
| if (isValue(mapFn)) callable(mapFn); | ||||
| if (!this || this === Array || !isFunction(this)) { | ||||
| // Result: Plain array | ||||
| if (!mapFn) { | ||||
| if (isArguments(arrayLike)) { | ||||
| // Source: Arguments | ||||
| length = arrayLike.length; | ||||
| if (length !== 1) return Array.apply(null, arrayLike); | ||||
| arr = new Array(1); | ||||
| arr[0] = arrayLike[0]; | ||||
| return arr; | ||||
| } | ||||
| if (isArray(arrayLike)) { | ||||
| // Source: Array | ||||
| arr = new Array((length = arrayLike.length)); | ||||
| for (i = 0; i < length; ++i) arr[i] = arrayLike[i]; | ||||
| return arr; | ||||
| } | ||||
| } | ||||
| arr = []; | ||||
| } else { | ||||
| // Result: Non plain array | ||||
| Context = this; | ||||
| } | ||||
| if (!isArray(arrayLike)) { | ||||
| if ((getIterator = arrayLike[iteratorSymbol]) !== undefined) { | ||||
| // Source: Iterator | ||||
| iterator = callable(getIterator).call(arrayLike); | ||||
| if (Context) arr = new Context(); | ||||
| result = iterator.next(); | ||||
| i = 0; | ||||
| while (!result.done) { | ||||
| value = mapFn ? call.call(mapFn, thisArg, result.value, i) : result.value; | ||||
| if (Context) { | ||||
| desc.value = value; | ||||
| defineProperty(arr, i, desc); | ||||
| } else { | ||||
| arr[i] = value; | ||||
| } | ||||
| result = iterator.next(); | ||||
| ++i; | ||||
| } | ||||
| length = i; | ||||
| } else if (isString(arrayLike)) { | ||||
| // Source: String | ||||
| length = arrayLike.length; | ||||
| if (Context) arr = new Context(); | ||||
| for (i = 0, j = 0; i < length; ++i) { | ||||
| value = arrayLike[i]; | ||||
| if (i + 1 < length) { | ||||
| code = value.charCodeAt(0); | ||||
| // eslint-disable-next-line max-depth | ||||
| if (code >= 0xd800 && code <= 0xdbff) value += arrayLike[++i]; | ||||
| } | ||||
| value = mapFn ? call.call(mapFn, thisArg, value, j) : value; | ||||
| if (Context) { | ||||
| desc.value = value; | ||||
| defineProperty(arr, j, desc); | ||||
| } else { | ||||
| arr[j] = value; | ||||
| } | ||||
| ++j; | ||||
| } | ||||
| length = j; | ||||
| } | ||||
| } | ||||
| if (length === undefined) { | ||||
| // Source: array or array-like | ||||
| length = toPosInt(arrayLike.length); | ||||
| if (Context) arr = new Context(length); | ||||
| for (i = 0; i < length; ++i) { | ||||
| value = mapFn ? call.call(mapFn, thisArg, arrayLike[i], i) : arrayLike[i]; | ||||
| if (Context) { | ||||
| desc.value = value; | ||||
| defineProperty(arr, i, desc); | ||||
| } else { | ||||
| arr[i] = value; | ||||
| } | ||||
| } | ||||
| } | ||||
| if (Context) { | ||||
| desc.value = null; | ||||
| arr.length = length; | ||||
| } | ||||
| return arr; | ||||
| }; | ||||