59 lines
1.8 KiB
JavaScript
59 lines
1.8 KiB
JavaScript
/**
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* Lo-Dash 2.3.0 (Custom Build) <http://lodash.com/>
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* Build: `lodash modularize modern exports="npm" -o ./npm/`
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* Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <http://lodash.com/license>
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*/
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var baseCreate = require('./../lodash._basecreate'),
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isObject = require('./../lodash.isobject'),
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setBindData = require('./../lodash._setbinddata');
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/**
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* Used for `Array` method references.
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*
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* Normally `Array.prototype` would suffice, however, using an array literal
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* avoids issues in Narwhal.
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*/
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var arrayRef = [];
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/** Native method shortcuts */
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var push = arrayRef.push;
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/**
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* The base implementation of `_.bind` that creates the bound function and
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* sets its meta data.
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*
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* @private
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* @param {Array} bindData The bind data array.
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* @returns {Function} Returns the new bound function.
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*/
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function baseBind(bindData) {
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var func = bindData[0],
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partialArgs = bindData[2],
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thisArg = bindData[4];
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function bound() {
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// `Function#bind` spec
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// http://es5.github.io/#x15.3.4.5
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if (partialArgs) {
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var args = partialArgs.slice();
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push.apply(args, arguments);
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}
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// mimic the constructor's `return` behavior
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// http://es5.github.io/#x13.2.2
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if (this instanceof bound) {
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// ensure `new bound` is an instance of `func`
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var thisBinding = baseCreate(func.prototype),
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result = func.apply(thisBinding, args || arguments);
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return isObject(result) ? result : thisBinding;
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}
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return func.apply(thisArg, args || arguments);
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}
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setBindData(bound, bindData);
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return bound;
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}
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module.exports = baseBind;
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