gistfile1.txt

var arr = [1,3,2,4];
console.log(arr);
var sorted_arr = arr.sort();
console.log(sorted_arr);
console.log(arr);

// prints what i don't want
// [1,3,2,4]
// [1,2,3,4]
// [1,2,3,4]

var arr = [1,3,2,4];
console.log(arr);
var sorted_arr = arr.slice().sort();
console.log(sorted_arr);
console.log(arr);

// prints what i want!
// [1,3,2,4]
// [1,2,3,4]
// [1,3,2,4]