修改数组内的对象而不使用循环

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.

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

这将用一行添加值，尽管它仍然是for循环

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