How does this JavaScript code sort these numbers?
Question
Can someone walk me through it? I don't understand what parameters are passed and things like that.
<html>
<body>
<script type="text/javascript">
function sortNumber(a, b)
{
return b - a;
}
var n = ["10", "5", "40", "25", "100", "1"];
document.write(n.sort(sortNumber));
</script>
</body>
</html>
3 answers
solution1
3 ACCPTED 2010-12-24 07:41:01
sort will compare a to b , and change the array to be in descending order.
The - operator will coerce them to Number .
If you want to see the members being passed as a and b , output them with something like console.log (if you have a console object).
solution2
1 2010-12-24 07:40:11
The function sortNumber will return something less than 0, 0 or something larger than 0. this will tell the sort which of the compared strings are numerically larger
https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/sort
solution3
1 2010-12-24 07:41:29
This link will help you understand:
https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/sort
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