tartget an array that forEach ran on javascript code example

Example 1: javascript foreach

const avengers = ['thor', 'captain america', 'hulk'];
avengers.forEach((item, index)=>{
	console.log(index, item)
})

Example 2: perform a function on each element of array javascript

var new_array = old_array.map(function(e) { 
  e.data = e.data.split(','); 
  return e;
});