Modify object inside array without using loop

Question

Is there any way in javascript which can modify array value. I have done it by using for loop and there is another method call forEach. I wanted to get it done by using only one line. Like I have seen code for converting onject into array by using Array.prototype.slice. So can we get the requirement done by using similar function. I google it but did not find any relevant post.

this.gome = (function(data){
 for(var i=0;i<data.length;i++){
 data[i].id = i
 }
 return data })(data.gome);
this.gome = Array.prototype.slice.call(data.gome,//code) // something like that.

• deceze: What's wrong with forEach exactly? Should be perfect here.
• Fire Crow: by using slice are you going to only need part of the array

Answer 1

map is your friend:

this.gome = data.gome.map((x, i) => ({...x, id: i}));

Or without ES2016 :

this.gome = data.gome.map((x, i) => Object.assign({}, x, {id: i }));

Answer 2

this will add the values with one line, it's still a for loop though

for(var i = 0, l = data.length; i<l; i++){ data[i].id = i };