25 lines
664 B
Markdown
25 lines
664 B
Markdown
---
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title: Pipe functions
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tags: function
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cover: goat-wooden-cottage
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firstSeen: 2017-12-26T19:02:27+02:00
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lastUpdated: 2020-10-22T20:24:04+03:00
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---
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Performs left-to-right function composition.
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- Use `Array.prototype.reduce()` with the spread operator (`...`) to perform left-to-right function composition.
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- The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
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```js
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const pipeFunctions = (...fns) =>
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fns.reduce((f, g) => (...args) => g(f(...args)));
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```
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```js
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const add5 = x => x + 5;
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const multiply = (x, y) => x * y;
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const multiplyAndAdd5 = pipeFunctions(multiply, add5);
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multiplyAndAdd5(5, 2); // 15
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```
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