Fix typos in spaces
Fix typo to fit the context Fix typo add space Fix small typo Fix small typo Fix typo Fix typo Fix typo Fix typo Fix typo Fix typo Fix typo Update tail.md Fix typo Fix small typo Fix typo Fix typo Fix typo Fix typo Fix small typo Fix typo Fix small typo Fix typo Fix typo Fix typo Fix typo Fix typo Fix typo Fix typo Fix typo Fix typo
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### initialize2DArray
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Initializes an 2D array of given width and height and value.
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Initializes a 2D array of given width and height and value.
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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`.
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Use `Array.map()` to generate h rows where each is a new array of size w initialize with value. If the value is not provided, default to `null`.
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```js
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const initialize2DArray = (w, h, val = null) => Array(h).fill().map(() => Array(w).fill(val));
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