April 2004
Intermediate to advanced
606 pages
20h 4m
English
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Other Ways to Validate Input
The converters and validators validate simple syntax and semantic rules, but many applications require more complex input validation. For instance, in a flight reservation application, verifying seat availability on the selected flight and validating the credit card information require access to external systems. It’s common to defer this type of validation to the backend code, invoked through event handlers when all the simple tests succeed. We’ll look at event handlers in the next chapter.
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.