javascript / beginner
Snippet
Storing Unique Values with Set
A Set is a built-in object that only stores unique values. If you try to add a duplicate, it is automatically ignored.
snippet.js
javascript
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const numbers = [1, 2, 2, 3];const uniqueNumbers = new Set(numbers);console.log(uniqueNumbers.size);
nodejs
Breakdown
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new Set(numbers)
Creates a new Set from the array, filtering out the duplicate '2'.
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uniqueNumbers.size
A property that returns the number of unique elements in the Set.