Hello all !
I've started to learn regexps by breaking them into logical
part. Could you please review whether my understanding of
the "fix subject" regexp below is correct.
Thank you
Sergey Kotov
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Original regexp:
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%Subject="Re:
%SetPattRegExp=""(?i)\A\:?(\s*(reply|subject|re|ha|rcpt|fwd|fw)(\[\d{1,3}\])?:\s*|\[.*?\])*\s*(.*?)\Z""%RegExpBlindMatch=""%OSubj""%SubPatt=""4"""
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"Structured" regexp:
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%Subject="Re:
%SetPattRegExp=""
(?i) #This is just "ignore case" option
\A #This is just beginning of the line, why not "^" ???
\:? #What is this ???
(
\s* #This is whitespace
(reply|subject|re|ha|rcpt|fwd|fw) #These are actual search strings
(\[\d{1,3}\]) #These are any digits in square brackets
?: #What is this ???
\s* #This is white space again
| #This is "or", but what does it relate to: "?:" | "\["
or some bigger portions of the expression ???
\[.*?\]) #Does this mean anything within square brackets
??? What is the purporse of specifying the actual search
strings above ?
*\s*(.*?) #These are strange and look almost the same:
white space followed by any character - why not just the
second portion ???
\Z"" #This is just the end of line
%RegExpBlindMatch=""%OSubj""%SubPatt=""4"""
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