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Community-controlled cheat sheets for every coder.
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Markdown
## .map(callback[, this])
Calls a defined callback function on each element of an array, and returns an array that contains the results.
```js
const radii = [10, 20, 30];
const areas = radii.map(function(radius){
const area = Math.PI * (radius * radius);
return area.toFixed(0);
});
// [314, 1257, 2827]
```
```js
const products = [1, 2, 3].map(function(nbr){
return nbr * 10;
});
// [10, 20, 30]
```