Quick JavaScript Tip: Emptying an array without losing reference

Published April 17, 2020, 1 min read, tagged as: javascriptcodequick tip

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Quick JavaScript Tip: Overwriting an array's length property gives us an easy way to truncate and clear its content.

const arr = [11, 22, 33, 44, 55, 66]

// truncate array
arr.length = 3 // [11, 22, 33]

// clear array without losing reference
arr.length = 0 // []

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Quick JavaScript Tip: Sets in JavaScript are a great way to store unique values. You can even convert Arrays to Sets to deduplicate them.

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Released September 30, 2020

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