Looking for anything on RegExps

Does anybody know where I can find some very newbie friendly books/papers/tuts/anything on Regular Expressions? I'm battling with it and I do not seem to get a hold on the subject.

Thanks in advance!

RegexBuddy: Learn, Create, Understand, Test, Use and Save Regular Expression

Just acknowledge the connection between regular expressions and finite automata (DFA/NFA) and you're golden.

take a look at these. top quality tutorials and imo very easy to comprehend.

You Don’t Know Anything About Regular Expressions: A Complete Guide | Nettuts+

Regular Expressions for Dummies: Screencast Series | Nettuts+

and a cheat sheet to get you started on the real thing :)

http://www.addedbytes.com/cheat-shee...t-sheet-v2.png

Quote:

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Originally Posted by Yamachi

RegexBuddy: Learn, Create, Understand, Test, Use and Save Regular Expression

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For linux, you can get the package, "regexxer". This tool searches through files on your computer (such as *.php (all PHP files) or something specific like test_regex.txt) to search/replace given a regex expression.

Of course, you can edit the file, too.

for learning REGEX on *nix systems, this package is great when used with a file such as test_regex.txt to store the text..


Text such as

Code:

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abcdefghijklmnopqrstubwxyz1234567890-=[]\;',./!@#$%^&*()_+{}|:"<>?

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Might be a good starting point.

Make sure you go into Edit->Preferences and change the high-light color, as for some reason it defaults to nothing (on KDE; Kubuntu).

To install this, use your package manager, or these commands:

Spoiler:

Ubuntu:
$ sudo apt-get install regexxer

Fedora, Red-hat, CentOS, you can try:
$ yum install regexxer

OpenSuse, you can try:
$ zypper in regexxer

Once installed, it's stored in Applications->Development.. But if your Desktop Environment doesn't support a search function by now, you should switch to something that does.. Like KDE4.3, Gnome3 or Unity.