javascript - JavScript looping and push method confusion -

for(var = 0 ;x < arr.length; i++){     temp.push({group:"edz", data:arr[i]['data'] }); } 

can me, im confused code

it take values of data column in arr array, , put them temp array, along value : edz on each row in column named group.

and, yeah, never change x value in for loop. should change i