Hi all
This is something I've come across a lot, and I was wondering people's views
on it.
When I'm looping through an array I generally do either this:
var arr = [1, 2, 3, 4];
for (var i = 0; i < arr.length; i++) {
console.log(arr[i]);
}
or this:
for (var i = 0, len = arr.length; i < len; i++) {
console.log(arr[i]);
}
I generally choose between these two depending on how many times I'm
expecting the loop to run. If I think it's going to be negligible, I'll
generally go for the former, just because I think it reads better.
Whenever I show anyone code like this though, they say "you should cache the
length property - you're looking it up on each iteration". So, what do you
guys think? To me, the second option smacks of premature optimisation.
Cheers
--
Nick Morgan
http://skilldrick.co.uk
@skilldrick <http://twitter.com/skilldrick>
--
To view archived discussions from the original JSMentors Mailman list:
http://www.mail-archive.com/[email protected]/
To search via a non-Google archive, visit here:
http://www.mail-archive.com/[email protected]/
To unsubscribe from this group, send email to
[email protected]
