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102 lines
2.7 KiB
JavaScript
102 lines
2.7 KiB
JavaScript
/**
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* lodash 4.0.0 (Custom Build) <https://lodash.com/>
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* Build: `lodash modularize exports="npm" -o ./`
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* Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var arrayEach = require('lodash._arrayeach'),
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baseEach = require('lodash._baseeach');
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/**
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* Converts `value` to a function if it's not one.
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*
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* @private
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* @param {*} value The value to process.
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* @returns {Function} Returns the function.
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*/
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function toFunction(value) {
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return typeof value == 'function' ? value : identity;
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}
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/**
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* Iterates over elements of `collection` invoking `iteratee` for each element.
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* The iteratee is invoked with three arguments: (value, index|key, collection).
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* Iteratee functions may exit iteration early by explicitly returning `false`.
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*
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* **Note:** As with other "Collections" methods, objects with a "length" property
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* are iterated like arrays. To avoid this behavior use `_.forIn` or `_.forOwn`
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* for object iteration.
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*
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* @static
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* @memberOf _
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* @alias each
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* @category Collection
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* @param {Array|Object} collection The collection to iterate over.
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* @param {Function} [iteratee=_.identity] The function invoked per iteration.
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* @returns {Array|Object} Returns `collection`.
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* @example
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*
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* _([1, 2]).forEach(function(value) {
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* console.log(value);
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* });
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* // => logs `1` then `2`
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*
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* _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
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* console.log(key);
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* });
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* // => logs 'a' then 'b' (iteration order is not guaranteed)
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*/
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function forEach(collection, iteratee) {
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return (typeof iteratee == 'function' && isArray(collection))
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? arrayEach(collection, iteratee)
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: baseEach(collection, toFunction(iteratee));
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}
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/**
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* Checks if `value` is classified as an `Array` object.
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*
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* @static
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* @memberOf _
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* @type Function
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* @category Lang
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* @param {*} value The value to check.
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* @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
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* @example
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*
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* _.isArray([1, 2, 3]);
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* // => true
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*
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* _.isArray(document.body.children);
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* // => false
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*
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* _.isArray('abc');
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* // => false
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*
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* _.isArray(_.noop);
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* // => false
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*/
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var isArray = Array.isArray;
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/**
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* This method returns the first argument given to it.
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*
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* @static
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* @memberOf _
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* @category Util
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* @param {*} value Any value.
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* @returns {*} Returns `value`.
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* @example
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*
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* var object = { 'user': 'fred' };
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*
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* _.identity(object) === object;
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* // => true
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*/
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function identity(value) {
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return value;
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}
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module.exports = forEach;
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