This might be a very basic question but I am not able to understand this so please help me to understand how the Javascript's Array.sort() function is working here. I need to understand the dry run of the code:
var x = new Array(5,4,3,78,7,66,5,444,7,8,9,33,4,5,666,1);
console.log("Before = "+ x);
x.sort(
function(a, b){
var m = a-b;
console.log(a+" - "+b+" = "+m);
return m;
}
);
console.log("After = "+ x);
When I run the above code I found the output as follows: (Here are the few lines of output)
5 - 1 = 4
1 - 7 = -6
5 - 7 = -2
3 - 5 = -2
78 - 5 = 73
666 - 5 = 661
etc....
And finally it printed the sorted array in ascending order:
After = 1,3,4,4,5,5,5,7,7,8,9,33,66,78,444,666
Please let me know how it is picking up the values for "a" and "b" and how it is doing all operation.
