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21 lines
496 B
21 lines
496 B
4 years ago
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# `macro()`
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The macro method lets you register custom methods
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```js
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collect().macro('uppercase', function () {
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return this.map(item => item.toUpperCase());
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});
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const collection = collect(['a', 'b', 'c']);
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collection.uppercase();
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collection.all();
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// ['A', 'B', 'C']
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```
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> Note that the `macro` method returns `undefined`, and therefore it is not possible to use it within a chain of methods.
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[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/macro.js)
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