May 2008
Intermediate to advanced
172 pages
4h 54m
English
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parseInt
parseInt is a function that converts a string
into an integer. It stops when it sees a nondigit, so parseInt("16") and parseInt("16
tons") produce the same result. It would be nice if the function
somehow informed us about the extra text, but it doesn't.
If the first character of the string is 0, then the string is evaluated in base 8
instead of base 10. In base 8, 8 and 9 are not digits, so parseInt("08") and parseInt("09")
produce 0 as their result. This error causes problems in programs that parse dates
and times. Fortunately, parseInt can take a radix
parameter, so that parseInt("08", 10) produces 8.
I recommend that you always provide the radix parameter.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.