Javascript parseInt gotcha (All browsers)

I wanted to keep this blog to put up interesting gotchas that I’ve found whilst programming. This is definitely one of the craziest I’ve seen.

I had a problem with my jquery calendar where I was parsing a string as an int. I was calling this:


So you would assume an int of 8 yeah?
The actual returned value is ZERO, which was a bit of a shock to me. Apparently the javascript parseInt function will take a string leading with a zero as an octal number. To force it to read a base 10 number you will have to call

parseInt("08", 10);

See this post for a great explanation Its amazing how long I have been programming in javascript and have never picked up this one..

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