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Help command $regex #249238 19/11/14 09:01 PM
J JuanAm
JuanAm J	I saw the wiki but have a single example: Quote: $regex(a cat walked by the dog,/cat\|dog/g) ;'cat' and 'dog' are matched, returns 2 But that example, I can not understand in this code: Code: alias YouTube { if ($regex($1-, /\Qyoutube.com/watch?v=\E(\w+)$/)) { sockclose YouTube sockopen YouTube www.youtube.com 80 ; keep the video ID for later on sockmark YouTube $regml(1) echo -a The video ID is: $regml(1) } else { echo $color(info) -aef /YouTube: invalid youtube link halt } } The line: Code: if ($regex($1-, /\Qyoutube.com/watch?v=\E(\w+)$/)) { a)Why \Q ? b) Why it that signifcan this: \E(\w+)$/) c) What is the use of /g in the example above of wiki? Please explain this whole line as simply and clearly, note that not mastered the English language. Thank you.

Re: Help command $regex #249242 19/11/14 09:46 PM
Joined: Dec 2013 Posts: 771 Sweden N Nillen Hoopy frood
Nillen Hoopy frood N Joined: Dec 2013 Posts: 771 Sweden	Explaining how regular expressions work is outside the scope of this forum. There's too much to say about it that it can't be done in here. You can read up on regular expressions at these sites: http://www.regular-expressions.info/ http://en.wikichip.org/wiki/mirc/regex

Re: Help command $regex #249243 19/11/14 10:01 PM
Joined: Jul 2006 Posts: 4,022 France W Wims Hoopy frood
Wims Hoopy frood W Joined: Jul 2006 Posts: 4,022 France	\Q \E is a sequence which allow you to escape whatever is inside this sequence, in this example it is used to escape the dot '.', the forward slash '/' and the '?' question mark, a backward slash could have been used to escape these: /youtube\.com\/watch\?v=(\w+)$/ the /g modifier allows you to multiple match at once, that's why you get 2 in your cat\|dog example, if you don't use /g, once one match has been found (cat), nothing else is processed and the function would return 1. #mircscripting @ irc.swiftirc.net == the best mIRC help channel

Re: Help command $regex Wims #249253 21/11/14 04:05 AM
J JuanAm
JuanAm J	Originally Posted By: Nillen Explaining how regular expressions work is outside the scope of this forum. There's too much to say about it that it can't be done in here. You can read up on regular expressions at these sites: http://www.regular-expressions.info/ http://en.wikichip.org/wiki/mirc/regex Thanks for the information, I will come to read. Originally Posted By: Wims \Q \E is a sequence which allow you to escape whatever is inside this sequence, in this example it is used to escape the dot '.', the forward slash '/' and the '?' question mark, a backward slash could have been used to escape these: /youtube\.com\/watch\?v=(\w+)$/ the /g modifier allows you to multiple match at once, that's why you get 2 in your cat\|dog example, if you don't use /g, once one match has been found (cat), nothing else is processed and the function would return 1. Thanks for the explanation, it was very helpful.

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