Strings as keys of array

Question

When using strings as keys of an array, console is showing that the array without these declared values and while iterating by this values where keys are strin

Answer 1

for( var i = arr.length; i--; console.log( arr[ i ] ) );

This will only give you the numeric indices, of course, but you can still loop over both numeric indices and string keys of your array like this:

for (var x in arr) {
    console.log(x + ": " + arr[x]);
}
/* (console output):
     0: 0
     1: 1
     2: 2
     3: 3
     something: aught
*/