JavaScript Problem: Identifying the Location(s) of a Value in an Array

At times you may want to retrieve the multiple locations (index number) for a value that may exist once, multiple times or not at all in an array. Through the magic of reduce, we can make this happen. In this tutorial we take a look at it.

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[singhkumardev]

Thanks a lot for you for sharing knowledge...plz keep it up...

[nnaemekaiwuchukwu]

I think I have been looking for a solution to a problem similar to this - however can the array operate on itself and return the index of similar values?