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import baseAssignValue from './.internal/baseAssignValue.js' |
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import reduce from './reduce.js' |
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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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* @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 The iteratee to transform keys. |
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* @returns {Object} Returns the composed aggregate object. |
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* @see groupBy, partition |
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* @example |
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* |
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* const 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, ({ code }) => String.fromCharCode(code)) |
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* // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } } |
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*/ |
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function keyBy(collection, iteratee) { |
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return reduce(collection, (result, value, key) => ( |
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baseAssignValue(result, iteratee(value), value), result |
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), {}) |
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} |
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export default keyBy |
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