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36 lines
1.2 KiB
36 lines
1.2 KiB
var baseAssignValue = require('./_baseAssignValue'), |
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createAggregator = require('./_createAggregator'); |
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/** |
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* Creates an object composed of keys generated from the results of running |
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* each element of `collection` thru `iteratee`. The corresponding value of |
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* each key is the last element responsible for generating the key. The |
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* iteratee is invoked with one argument: (value). |
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* |
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* @static |
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* @memberOf _ |
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* @since 4.0.0 |
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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 iteratee to transform keys. |
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* @returns {Object} Returns the composed aggregate object. |
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* @example |
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* |
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* var array = [ |
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* { 'dir': 'left', 'code': 97 }, |
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* { 'dir': 'right', 'code': 100 } |
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* ]; |
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* |
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* _.keyBy(array, function(o) { |
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* return String.fromCharCode(o.code); |
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* }); |
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* // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } } |
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* |
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* _.keyBy(array, 'dir'); |
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* // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } } |
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*/ |
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var keyBy = createAggregator(function(result, value, key) { |
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baseAssignValue(result, key, value); |
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}); |
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module.exports = keyBy;
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