25 lines
525 B
Markdown
25 lines
525 B
Markdown
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# `mapToDictionary()`
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Run a dictionary map over the items.
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The callback should return an associative array with a single key/value pair.
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```js
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const collection = collect([
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{ id: 1, name: 'a' },
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{ id: 2, name: 'b' },
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{ id: 3, name: 'c' },
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{ id: 4, name: 'b' },
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]);
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const groups = collection.mapToDictionary(item => [item.name, item.id]);
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groups.all();
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// {
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// a: [1],
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// b: [2, 4],
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// c: [3],
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// }
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```
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[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/mapToDictionary.js)
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