%PDF- %PDF-
Direktori : /proc/thread-self/root/var/www/html/node_modules/function-bind/ |
Current File : //proc/thread-self/root/var/www/html/node_modules/function-bind/implementation.js |
'use strict'; /* eslint no-invalid-this: 1 */ var ERROR_MESSAGE = 'Function.prototype.bind called on incompatible '; var toStr = Object.prototype.toString; var max = Math.max; var funcType = '[object Function]'; var concatty = function concatty(a, b) { var arr = []; for (var i = 0; i < a.length; i += 1) { arr[i] = a[i]; } for (var j = 0; j < b.length; j += 1) { arr[j + a.length] = b[j]; } return arr; }; var slicy = function slicy(arrLike, offset) { var arr = []; for (var i = offset || 0, j = 0; i < arrLike.length; i += 1, j += 1) { arr[j] = arrLike[i]; } return arr; }; var joiny = function (arr, joiner) { var str = ''; for (var i = 0; i < arr.length; i += 1) { str += arr[i]; if (i + 1 < arr.length) { str += joiner; } } return str; }; module.exports = function bind(that) { var target = this; if (typeof target !== 'function' || toStr.apply(target) !== funcType) { throw new TypeError(ERROR_MESSAGE + target); } var args = slicy(arguments, 1); var bound; var binder = function () { if (this instanceof bound) { var result = target.apply( this, concatty(args, arguments) ); if (Object(result) === result) { return result; } return this; } return target.apply( that, concatty(args, arguments) ); }; var boundLength = max(0, target.length - args.length); var boundArgs = []; for (var i = 0; i < boundLength; i++) { boundArgs[i] = '$' + i; } bound = Function('binder', 'return function (' + joiny(boundArgs, ',') + '){ return binder.apply(this,arguments); }')(binder); if (target.prototype) { var Empty = function Empty() {}; Empty.prototype = target.prototype; bound.prototype = new Empty(); Empty.prototype = null; } return bound; };