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Update initialize2DArray.md

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Angelos Chalaris
2017-12-20 11:13:05 +02:00
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snippets/initialize2DArray.md
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Initializes an 2D array of given width and height and value. Initializes an 2D array of given width and height and value.
Use `Array.map()` to generate h rows where each is a new array of size w initialize with value. If value is not provided, default to null. Use `Array.map()` to generate h rows where each is a new array of size w initialize with value. If value is not provided, default to `null`.
```js ```js
const initialize2DArray = (w, h, val = null) => const initialize2DArray = (w, h, val = null) => Array(h).fill().map(() => Array(w).fill(val));
Array(h).fill().map(() => Array(w).fill(val)); // initializeArrayWithRange(2, 2, 0) -> [[0,0], [0,0]]
// initializeArrayWithRange(2, 2, 0) -> [[0,0],
// [0,0]]
``` ```