| /** |
| * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/> |
| * Build: `lodash modularize underscore exports="node" -o ./underscore/` |
| * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/> |
| * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE> |
| * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors |
| * Available under MIT license <http://lodash.com/license> |
| */ |
| var baseCreate = require('./baseCreate'), |
| isObject = require('../objects/isObject'), |
| slice = require('./slice'); |
| |
| /** |
| * Used for `Array` method references. |
| * |
| * Normally `Array.prototype` would suffice, however, using an array literal |
| * avoids issues in Narwhal. |
| */ |
| var arrayRef = []; |
| |
| /** Native method shortcuts */ |
| var push = arrayRef.push; |
| |
| /** |
| * The base implementation of `_.bind` that creates the bound function and |
| * sets its meta data. |
| * |
| * @private |
| * @param {Array} bindData The bind data array. |
| * @returns {Function} Returns the new bound function. |
| */ |
| function baseBind(bindData) { |
| var func = bindData[0], |
| partialArgs = bindData[2], |
| thisArg = bindData[4]; |
| |
| function bound() { |
| // `Function#bind` spec |
| // http://es5.github.io/#x15.3.4.5 |
| if (partialArgs) { |
| // avoid `arguments` object deoptimizations by using `slice` instead |
| // of `Array.prototype.slice.call` and not assigning `arguments` to a |
| // variable as a ternary expression |
| var args = slice(partialArgs); |
| push.apply(args, arguments); |
| } |
| // mimic the constructor's `return` behavior |
| // http://es5.github.io/#x13.2.2 |
| if (this instanceof bound) { |
| // ensure `new bound` is an instance of `func` |
| var thisBinding = baseCreate(func.prototype), |
| result = func.apply(thisBinding, args || arguments); |
| return isObject(result) ? result : thisBinding; |
| } |
| return func.apply(thisArg, args || arguments); |
| } |
| return bound; |
| } |
| |
| module.exports = baseBind; |