21 lines
567 B
Markdown
21 lines
567 B
Markdown
---
|
|
title: pipeFunctions
|
|
tags: function,intermediate
|
|
---
|
|
|
|
Performs left-to-right function composition.
|
|
|
|
Use `Array.prototype.reduce()` with the spread operator (`...`) to perform left-to-right function composition.
|
|
The first (leftmost) function can accept one or more arguments; the remaining functions must be unary.
|
|
|
|
```js
|
|
const pipeFunctions = (...fns) => fns.reduce((f, g) => (...args) => g(f(...args)));
|
|
```
|
|
|
|
```js
|
|
const add5 = x => x + 5;
|
|
const multiply = (x, y) => x * y;
|
|
const multiplyAndAdd5 = pipeFunctions(multiply, add5);
|
|
multiplyAndAdd5(5, 2); // 15
|
|
```
|