25 lines
643 B
Markdown
25 lines
643 B
Markdown
---
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title: Convert function to variadic
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type: snippet
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language: javascript
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tags: [function,array]
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cover: polar-bear
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dateModified: 2021-06-13T13:50:25+03:00
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---
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Changes a function that accepts an array into a variadic function.
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- Given a function, return a closure that collects all inputs into an array-accepting function.
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```js
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const collectInto = fn => (...args) => fn(args);
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```
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```js
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const Pall = collectInto(Promise.all.bind(Promise));
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let p1 = Promise.resolve(1);
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let p2 = Promise.resolve(2);
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let p3 = new Promise(resolve => setTimeout(resolve, 2000, 3));
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Pall(p1, p2, p3).then(console.log); // [1, 2, 3] (after about 2 seconds)
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```
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