Do you want to ignore case in a regular expression? There are a variety of ways of doing it ... depending on the language you're writing. Here are some hints:

/abcd/i Perl - an i after the regular expression
eregi PHP - use eregi rather than ereg
re.I or re.IGNORECASE Python - extra parameters to the compile method
-nocase Tcl - this option is available on regexes in Tcl

But there are times yo want to apply the "ignore case" to only part of a regular expression, or use it in some other circumstances such as within Tcl's array names command. And here you can use the embedded notation of the form (?i). Here's an example - in Tcl, but this technique works for most languages these days!

set results [array names table -regexp (?i)$where]
(written 2007-09-08 01:23:52)

 H107 - String Handling in PHP
Y115 - Additional Python Facilities
T247 - Tcl/Tk - Advanced Regular Expressions
P212 - Perl - More on Character Strings
Q803 - Object Orientation and General technical topics - Regular Expressions - Extra Elements

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Tk locks up - 100% c.p.u. on a simple program (Tcl, Perl, Python)
Packages and Namespaces are like Suitcases and Aircraft
Handling Binary data in Tcl (with a note on C)
A series of tyre damages
Ignore case in Regular Expression
Expanding a grid - Tcl/Tk
Stable sorting - Tcl, Perl and others
Kasteel Elsloo - Michelin rated hotel.
Melksham Hotel - Five Star Kitchen!
MySQL joins revisited
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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