24 lines
519 B
JavaScript
24 lines
519 B
JavaScript
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'use strict';
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var nestedValue = require('../helpers/nestedValue');
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var _require = require('../helpers/is'),
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isFunction = _require.isFunction;
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module.exports = function keyBy(key) {
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var collection = {};
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if (isFunction(key)) {
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this.items.forEach(function (item) {
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collection[key(item)] = item;
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});
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} else {
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this.items.forEach(function (item) {
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var keyValue = nestedValue(item, key);
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collection[keyValue || ''] = item;
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});
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}
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return new this.constructor(collection);
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};
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