JavaScript Array Map From Scratch

javascriptArrayMapFromScratch.js

// 1 - Create map function
function map(array, fn){
  let newArr = [];
  
  for (value of array){
    newArr.push(fn(value));
  }
  
  return newArr;
}

// 2 - Create an array to iterate into map
const myArr = [1,2,3];

// 3 - The callback function to modify the value of each map iteration
function doubleIt(value){
  return value * 2;
}

// 4 - Execute the map function with myArr and doubleIt and return it to doubleArrayValues const
const doubleArrayValues =  map(myArr, doubleIt); // [2,4,6]