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42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
JavaScript
var arrayEach = require('./_arrayEach'),
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baseEach = require('./_baseEach'),
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castFunction = require('./_castFunction'),
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isArray = require('./isArray');
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/**
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* Iterates over elements of `collection` and invokes `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"
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* property are iterated like arrays. To avoid this behavior use `_.forIn`
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* or `_.forOwn` for object iteration.
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*
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* @static
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* @memberOf _
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* @since 0.1.0
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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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* @see _.forEachRight
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* @example
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*
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* _.forEach([1, 2], 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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var func = isArray(collection) ? arrayEach : baseEach;
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return func(collection, castFunction(iteratee));
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}
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module.exports = forEach;
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