22 lines
1.1 KiB
JavaScript
22 lines
1.1 KiB
JavaScript
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'use strict';
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var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();
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module.exports = function mapToGroups(fn) {
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var collection = {};
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this.items.forEach(function (item, key) {
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var _fn = fn(item, key),
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_fn2 = _slicedToArray(_fn, 2),
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keyed = _fn2[0],
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value = _fn2[1];
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if (collection[keyed] === undefined) {
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collection[keyed] = [value];
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} else {
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collection[keyed].push(value);
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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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