8ee50178f3
Correct: `Array.from()` (it’s a static method) Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method) This patch uses the common `#` syntax to denote `.prototype.`.
17 lines
505 B
Markdown
17 lines
505 B
Markdown
### overArgs
|
|
|
|
Creates a function that invokes the provided function with its arguments transformed.
|
|
|
|
Use `Array.prototype.map()` to apply `transforms` to `args` in combination with the spread operator (`...`) to pass the transformed arguments to `fn`.
|
|
|
|
```js
|
|
const overArgs = (fn, transforms) => (...args) => fn(...args.map((val, i) => transforms[i](val)));
|
|
```
|
|
|
|
```js
|
|
const square = n => n * n;
|
|
const double = n => n * 2;
|
|
const fn = overArgs((x, y) => [x, y], [square, double]);
|
|
fn(9, 3); // [81, 6]
|
|
```
|