EntropySink
Technical & Scientific => Programming => Topic started by: hans on February 06, 2007, 04:27:09 PM
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OK, so I code quite a bit of VXML for work and within the VXML you can use JavaScript to do some useful things. Well, today I racked my brain because I'm not a JavaScript guru and tried to get away with being clever (not horribly mind you).
So in part of my code I wanted to bypass something by setting a value to '' (empty string. Now comes the fun part, the value sometimes can be 0 (the number zero not the string). And like every other flippin' language I code val != '' to make sure I'm not going to bypass. Well, JavaScript thinks 0 == '', which is obviously intuitive. I mean why would anyone think those don't match. I did find a blog about the gotcha with an explanation but grrr.
Don't even get me started on null and undefined.