18 lines
467 B
Markdown
18 lines
467 B
Markdown
### compose
|
|
|
|
Performs right-to-left function composition.
|
|
|
|
Use `Array.reduce()` to perform right-to-left function composition.
|
|
The last (rightmost) function can accept one or more arguments; the remaining functions must be unary.
|
|
|
|
```js
|
|
const compose = (...fns) => fns.reduce((f, g) => (...args) => f(g(...args)));
|
|
```
|
|
|
|
```js
|
|
const add5 = x => x + 5;
|
|
const multiply = (x, y) => x * y;
|
|
const multiplyAndAdd5 = compose(add5, multiply);
|
|
multiplyAndAdd5(5, 2); // 15
|
|
```
|