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

Map function goes through each element of an array in ascending order and invokes function f on all of them. 
It returns new array which is being computed after function is invoked on it.

Ref: http://www.thesstech.com/javascript/array_map_method

Syntax
array.map(f)

Example:



 
 
 


Answer: 8,10,12
Ref: http://www.thesstech.com/tryme?filename=javascript_array_map_method