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.

What's wrong with forEach exactly? Should be perfect here. — deceze
– deceze ♦, Commented Feb 3, 2016 at 15:14

Benjamin Gruenbaum · Accepted Answer · 2016-02-03 15:16:05Z

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 }));

answered Feb 3, 2016 at 15:16

Benjamin Gruenbaum

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Fire Crow · Accepted Answer · 2016-02-03 15:30:46Z

0

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 };

answered Feb 3, 2016 at 15:30

Fire Crow

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