How to remove duplicate value in array?

Question

Without deleting the first value.. 😊😊

Answer 1

In Java and C++ you can use a set, which by definition has no duplicates.

Here's a solution for JavaScript:
https://stackoverflow.com/questions/9229645/remove-duplicate-values-from-js-array?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa

Answer 2

You create an array of elements you've already seen.