javascript

So I primarily come from a graphic design background, which is one of the things that's attracted me to QC so much. I'm quickly coming to the realization that I need to flex my analytical side a bit more, and teach myself something a bit complex.

So I decided to start with Javascript because it would have the most use and immediate utility for my projects. I need someone assistance in finding tutorials and the like for someone that doesn't think like a programmer. If that makes any sense.

Any ideas?

G'Day all

I was just wondering if anyone knows a clean way to check if a number is NaN.

I have tried 4 ways and only one returns true, but its a bit messy.

1/ (This way doesn't work)

var testNumber = NaN;
 
if (testNumber == undefined) // This returns false
   Log("testNumber is NaN"); 
else
   Log("testNumber was not detected as NaN)";

2/ (This way errors)

var testNumber = NaN;
 
if (isnan(testNumber)) // This errors as there is no isnan() method
   Log("testNumber is NaN"); 
else
   Log("testNumber was not detected as NaN)";

3/ (This way doesn't work)

var testNumber = NaN;
 
if (testNumber == NaN) // returns false
   Log("testNumber is NaN"); 
else
   Log("testNumber was not detected as NaN)";

4/ (This way works, but is not clean and makes me sad inside)

var testNumber = NaN;
var testNumber2 = testNumber || -9999;
 
if (testNumber == -9999) // returns true, as wanted.
   Log("testNumber is NaN"); 
else
   Log("testNumber was not detected as NaN)";

Anyone have any ideas?

Cheers

Lango

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