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1 snippet tagged #unique · Show all

JavaScript October 14, 2026 JavaScript remove duplicates from an array A Set keeps only unique values, so spreading it back into an array removes duplicates. For objects, dedupe by a key with a Map. const nums = [1, 2, 2, 3, 3, 3]; const unique = [...new Set(nums)]; console.log(unique); // [1, 2, 3]

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