How to Find Unique Values in a JavaScript Array Using `Set`?

Getting Unique Values in an Array Using JavaScript

To extract unique values from an array, the need for a second array is not always necessary. JavaScript does not possess a hashmap structure similar to Java. However, ES6 introduces the Set object, which can be utilized to achieve uniqueness.

A highly concise solution using Set and the spread operator is as follows:

const a = [1, 1, 2];
const uniqueValues = [...new Set(a)];

This returns [1, 2] as the unique values within the input array. The Set object automatically filters out duplicate values, and the spread operator (...) converts the set back into an array.

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