17 lines
558 B
Markdown
17 lines
558 B
Markdown
---
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title: coalesceFactory
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tags: utility,intermediate
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---
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Returns a customized coalesce function that returns the first argument that returns `true` from the provided argument validation function.
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Use `Array.prototype.find()` to return the first argument that returns `true` from the provided argument validation function.
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```js
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const coalesceFactory = valid => (...args) => args.find(valid);
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```
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```js
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const customCoalesce = coalesceFactory(_ => ![null, undefined, '', NaN].includes(_));
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customCoalesce(undefined, null, NaN, '', 'Waldo'); // "Waldo"
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``` |