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node_modules/es5-ext/array/#/concat/shim.js
Maintainability
72.13
Lines of code
39
Difficulty
17.83
Estimated Errors
0.32
Function weight
By Complexity
By SLOC
'use strict'; var isPlainArray = require('../../is-plain-array') , toPosInt = require('../../../number/to-pos-integer') , isObject = require('../../../object/is-object') , 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); }; module.exports = function (item/*, …items*/) { var result; if (!this || !isArray(this) || isPlainArray(this)) { return concat.apply(this, arguments); } result = new this.constructor(this.length); forEach.call(this, function (val, i) { result[i] = val; }); 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; };