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utf8mb4
Commit Description:
utf8mb4
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node_modules/es5-ext/array/#/concat/shim.js
| 44 lines
| 1.2 KiB
| application/javascript
| JavascriptLexer
|
| r789 | "use strict"; | |||
| var isPlainArray = require("../../is-plain-array") | ||||
| , toPosInt = require("../../../number/to-pos-integer") | ||||
| , isObject = require("../../../object/is-object") | ||||
| , isConcatSpreadable = require("es6-symbol").isConcatSpreadable | ||||
| , isArray = Array.isArray | ||||
| , concat = Array.prototype.concat | ||||
| , forEach = Array.prototype.forEach | ||||
| , isSpreadable; | ||||
| isSpreadable = function (value) { | ||||
| if (!value) return false; | ||||
| if (!isObject(value)) return false; | ||||
| if (value[isConcatSpreadable] !== undefined) { | ||||
| return Boolean(value[isConcatSpreadable]); | ||||
| } | ||||
| return isArray(value); | ||||
| }; | ||||
| // eslint-disable-next-line no-unused-vars | ||||
| module.exports = function (item/*, …items*/) { | ||||
| var result; | ||||
| if (!this || !isArray(this) || isPlainArray(this)) { | ||||
| return concat.apply(this, arguments); | ||||
| } | ||||
| result = new this.constructor(); | ||||
| if (isSpreadable(this)) { | ||||
| forEach.call(this, function (val, i) { result[i] = val; }); | ||||
| } else { | ||||
| result[0] = this; | ||||
| } | ||||
| forEach.call(arguments, function (arg) { | ||||
| var base; | ||||
| if (isSpreadable(arg)) { | ||||
| base = result.length; | ||||
| result.length += toPosInt(arg.length); | ||||
| forEach.call(arg, function (val, i) { result[base + i] = val; }); | ||||
| return; | ||||
| } | ||||
| result.push(arg); | ||||
| }); | ||||
| return result; | ||||
| }; | ||||