Cool Programming

Regular Expressions in Javascript

Wed, 28 Jun 2006 17:12:31 GMT

I've been working today with regular expressions in javascript, trying to validate XSD types using the string.match(/../) javascript function. I found a lot of regular expressions at the Regular Expression Library, but pretty much every regex there has some limitation, so I had to write my own. The best tutorial for writing my own was at Internet Related Technologies. Some of my own follow.

boolean
d.match(/^(true|false|0|1)$/)
integer
d.match(/^[-+]?\d+$/)
nonNegativeInteger
d.match(/^[+]?\d+$/)
positiveInteger
d.match(/^[+]?0*[1-9]\d*$/)
negativeInteger
d.match(/^-0*[1-9]\d*$/)
nonPositiveInteger
d.match(/^(-\d+|[-+]?0+)$/)
decimal
d.match(/^[-+]?(\d*\.\d+|\d+)$/)
hexBinary
d.match(/^[0-9a-fA-F]+$/)

I'll post others in the comments, as I discover them.

XmlWriter

Fri, 23 Jun 2006 02:09:03 GMT

I've always found the XmlWriter in System.Xml to be quite verbose. I spent the last hour writing my own, less verbose version. Here's a small sample.

kb.xml.Node n = kb.xml.Node.Root("Element1");
n = n.Element("Element2");
n.Attribute("Attr1", "value1");
n.Attribute("Attr2", "value2");

As you can see, this is much less verbose than the equivalent XmlWriter. What's even better is that the kb.xml.Node class is simply a wrapper around System.Xml.XmlNode, so you can quickly get to the DOM.

http://www.kbcafe.com/csharp/XmlWriter.zip

C# or PHP/Python/Ruby

Wed, 14 Jun 2006 20:09:31 GMT

Two years ago, people were telling me I should be using PHP, not C#. Last year it was Python, not C#. This year, it's Ruby not C#. Can you tell me the constant?

MSDN Search Sucks

Tue, 13 Jun 2006 16:30:22 GMT

For years, I struggled with Microsoft's online MSDN search. Then Google got so good that you could search MSDN better using Google. With recent MSDN changes (new msdn2 domain), it would seem that's no longer the case. So, I thought to myself, how hard would it be to write my own. Turns out, it wasn't that hard and it rocks!

http://www.kbcafe.com/msdn.aspx