Using a for each loop on an empty array in JavaScript [duplicate]

Answer 1

.forEach runs your function for each element in the array. Setting the value of i does nothing, it's not a reference.

Just use a normal for loop:

for(var i = 0; i < arr.length; i++){
    arr[i] = 0;
}

Or instead of doing new Array(10), you can just do:

var arr = [];
for(var i = 0; i < 10; i++){
    arr[i] = 0;
}