Creating an array of empty arrays

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If you do:

let arr = new Array(5);
arr.fill([]);

This will make an array of 5 identical arrays where editing one will update all which is rarely what anyone wants. To achieve an array of different arrays use:

let arr = Array.from(new Array(5), () => [])

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About me

Mark Wong is a front end developer with 10+ years experience. Most of his knowledge of HTML5, CSS and Js is self taught.

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