What is the concept of Array.map?

Question

I am having problems understanding the concept of Array.map. I did go to Mozilla and Tutorials Point, but they provided very limited info regarding this.

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Answer 1

Probably most people coming here (like me) just want a basic array.map usage example:

myArray = [1,2,3]
mappedArray = [];

mappedArray = myArray.map(function(currentValue){
     return currentValue *= 2;
})

//myArray is still [1,2,3]
//mappedArray is now [2,4,6]

This is it at it's most basic. For additional parameers, check out: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map