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Learning regular expressions #222921 09/07/10 07:06 AM
Joined: Dec 2002 Posts: 120 The Netherlands S STING OP Vogon poet
OP STING Vogon poet S Joined: Dec 2002 Posts: 120 The Netherlands	So after many years, I'm finally learning myself regular expressions My first attempt should be a simple enough task, getting an event to trigger on your nickname, while not being part of another word (STING=true, teSTING=false) So far I succeed with a '==' and 3 $regex'es, but I think this could probably be done by one $regex, right? Code: alias _regex { ;should be False var %text.1 = testing ;should be True var %text.2 = test STING test ;should be True var %text.3 = STING test ;should be True var %text.4 = test STING ;should be True var %text.5 = STING var %tmp = 0 clear while (%tmp < 5) { inc %tmp var -s %txt = %text. [ $+ [ %tmp ] ] if (%txt == STING) \|\| $regex(%txt,/ STING /) \|\| $regex(%txt,STING$) \|\| $regex(%txt,^STING) { echo -a % $+ text. $+ %tmp is 3True } else { echo -a % $+ text. $+ %tmp is 4False } } }

Re: Learning regular expressions STING #222923 09/07/10 08:48 AM
Joined: Feb 2006 Posts: 523 J jaytea Fjord artisan
jaytea Fjord artisan J Joined: Feb 2006 Posts: 523	good on ya STING :P the reason 'teSTING' is not being matched is that regex in mIRC is, by default, case sensitive. if you use the pattern /STING$/i on that second last check, 'teSTING' would then be matched. if you mean to combine the following: /^STING$/ /^STING / / STING$/ / STING / ie. the regex equivalent of checking $istok( ,STING,32), then you should take note of the fact that they are all quite similar and include your nick somewhere in the middle. more precisely, on the left side of your nickname we want to match either ^ or a space; on the right side of your nickname we want to match either a space or $. we can then use \| (indicating alternatives, you can think of it as an 'OR' operator) combined with ( ) (a group) to produce: /(^\| )STING( \|$)/ ( ) also have the property of saving what is matched for later reference with $regml(). quite often this is wasteful and unnecessary, (?: ) can be used to group alternatives without saving the result. you'll come across these constructs later on i imagine, good luck! "The only excuse for making a useless script is that one admires it intensely" - Oscar Wilde

Re: Learning regular expressions jaytea #222928 09/07/10 05:44 PM
Joined: Jul 2007 Posts: 1,124 United States T Tomao Hoopy frood
Tomao Hoopy frood T Joined: Jul 2007 Posts: 1,124 United States	/(?:sting)/ does not alter the matching behavior, the regex just doesn't capture it.

Re: Learning regular expressions Tomao #222929 09/07/10 05:46 PM
Joined: Sep 2005 Posts: 2,630 H hixxy Hoopy frood
hixxy Hoopy frood H Joined: Sep 2005 Posts: 2,630	That's what he said, "(?: ) can be used to group alternatives without saving the result."

Re: Learning regular expressions hixxy #222963 10/07/10 09:33 PM
Joined: Dec 2002 Posts: 120 The Netherlands S STING OP Vogon poet
OP STING Vogon poet S Joined: Dec 2002 Posts: 120 The Netherlands	Thanks guys

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