I enhanced the tutorial with two more chapters: one about the lookaheads/lookbehinds (it is important because a varible width lookbehind is not allowed in a regex but sometimes necessary) and one about the use of lambda functions.

2011/7/3 Bináris <wikiposta@gmail.com>
I am glad to announce this small guide to functions which is the result of my last two day's work:
http://hu.wikipedia.org/wiki/Szerkeszt%C5%91:Bin%C3%A1ris/Fixes_and_functions_HOWTO

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Bináris