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Issue 12.6 ('Cheap Web App Hosting')
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All About That Space

Making Regular Expressions Easier to Read and Maintain

Issue: 12.6 (November/December 2014)
Author: Kem Tekinay
Author Bio: Kem Tekinay is a Macintosh consultant and programmer who started with Xojo when it was still REALbasic. He is the author of RegExRX (http://www.mactechnologies.com/index.php:i?page=downloads#regexrx), the popular regular expression editor for Mac and Windows.
Article Description: No description available.
Article Length (in bytes): 9,575
Starting Page Number: 92
Article Number: 12613
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Excerpt of article text...

Regular expressions that go beyond simple searches can sometimes be (gasp) a little hard to read. I know! But it's true. Fortunately, some techniques can help you to craft a pattern in a readable and, more importantly, maintainable way.

Setting The Stage

In a traditional language like Xojo, you have some measure of control over readability. The syntax itself is out of your grasp, to be sure, but you can lay out your code so that it becomes clearer even to the casual observer.

Consider this block of code:

for i as integer=0 to arr.ubound

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