CODEWITHSUNDEEP
javascript
John
John

Reputation: 13699

Why would you use 0 > 0 in javascript?

I was going through some of StackOverflow's client side code and I ran across this block of JavaScript in the source-code of https://stackoverflow.com/questions/ask:

if ($answerCheckbox.is(':checked') || 0 > 0) {
     $answerCheckbox.attr('checked', true);
     $('#question-only-section').hide();
     StackExchange.using("editor", function () {
          setTimeout(function () { showAnswerSection(true) }, 2);
     });
}

Why wouldn't you use false instead?

Upvotes: 15

Views: 451

Answers (4)

Tim Withers
Tim Withers

Reputation: 12059

There is no reason for it... but until you know the server side code, you can't know for sure.

Let's say (PHP) you had a variable $x=1 and could also be $x=0 depending on the scenario.

if ($answerCheckbox.is(':checked') || <?php echo $x;?> > 0) {

That code makes perfect sense....

Upvotes: 6

Nelson Ben&#237;tez Le&#243;n
Nelson Ben&#237;tez Le&#243;n

Reputation: 50573

Because that line probably comes from php, like so:

if ($answerCheckbox.is(':checked') || <?php echo $tot; ?> > 0) {

I know because in some situations I had to write code like that.

Upvotes: 4

ThiefMaster
ThiefMaster

Reputation: 318518

It is generated code (not in a .js) file so obviously one of those two values is not always 0 but a server-side variable.

Upvotes: 6

David W
David W

Reputation: 10184

You're assuming the code is all natively written Javascript. It isn't uncommon to see some server-generated script which references elements via some programmatic identifier which resolves like this at runtime, which admittedly looks a little peculiar.

Upvotes: 15

Related Questions