25 lines
829 B
JavaScript
25 lines
829 B
JavaScript
import { helper } from '@ember/component/helper';
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const groupByReducer = (items, key) => {
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const obj = items.reduce((result, item) => {
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if (!result[item[key]]) result[item[key]] = { key: item[key], items: [] };
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result[item[key]].items.push(item);
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return result;
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}, {});
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// Convert object group to an array for iteration
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const arr = Object.keys(obj).map((key) => obj[key]);
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return arr;
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};
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/**
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* This helper accepts an array of objects and groups them by a specified key.
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* It returns a new array of objects in the form [{ key, items }], where `key`
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* is the value of the specified key and `items` is an array of matching items.
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* @param {object[]} items
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* @param {string} key
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*/
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export default helper(function groupBy([items, key]) {
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const result = groupByReducer(items, key);
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return result;
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});
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