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Remove duplicates in JavaScript

Feb 2, 2021

Clones might take over the world, we - as JavaScript guardians need to learn how to remove duplicates from an array.

JavaScript

We created removeDuplicates function which accepts an array argument.
The above code needs to be read from the right. We're transforming our duplicates array into a new Set. Set is a specific data structure that accepts only unique values.
After that, we're getting back to an array, using the Rest spread operator with array syntax, [...].
One-liner, clean and modern, one more time: duplicates array -> new Set(array) = only unique values -> [...] spread into an array again = no more clones!

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