Re: grep is really pathetic sometimes

This WebDNA talk-list message is from

2003

It keeps the original formatting. numero = 51318
interpreted = N
texte = Hi John,I tried that same code:>> code:[Text show=T]SKU=TROUTPRINT.JPG[/Text]

[grepsearch=^([A-Z0-9][0-9A-Z])([0-9A-Z][0-9A-Z][0-9A-Z])&replace=\1/\2/][getchars start=1&end=5][SKU][/getchars][/grep]>> output:TROUTPRINT.JPGTR/OUT/Raj----- Original Message ----- From: "John Peacock" To: "WebDNA Talk" Sent: Wednesday, June 25, 2003 2:10 AMSubject: RFE: grep is really pathetic sometimes> > I love using regular expressions to process my text (which is why I spendmost> of my time using Perl these days). However, one of my other developerscame to> me to ask why a particular grep was working the way it was.>> The code is as follows:>> [grep>search=^([A-Z0-9][0-9A-Z])([0-9A-Z][0-9A-Z][0-9A-Z])&replace=\1/\2/][getchars> start=1&end=5][SKU][/getchars][/grep]>> That *should* match the first two characters (as \1) and the next three(as \2).> It always seemed to work when we were only looking at numbers, but wehad to> extend it to work with characters as well as and it suddenly startedmatching> twice for one item.>> For SKU=TROUTPRINT.JPG, we expected it to return "TR/OUT/", but it wouldreturn> "TR/OUT/PR/INT" instead. It turns out that [grep] doesn't understand the> beginning of line (BOL) anchor "^" character. Consequently, the patternwas> matching twice (because this item had a longer SKU than the other items).This> is very annoying and vastly reduces the usabililty of [grep] for me.>> Why couldn't WebCat provide a real regex engine like Perl CompatibleRegular> Expressions:>> http://www.pcre.org/>> instead of whatever hodgepodge of code it currently has? At the veryleast,> WebCat should have thrown some sort of an error for the "^" which itdoesn't> understand.> >> John>> -- > John Peacock> Director of Information Research and Technology> Rowman & Littlefield Publishing Group> 4501 Forbes Boulevard> Suite H> Lanham, MD 20706> 301-459-3366 x.5010> fax 301-429-5748>>> -------------------------------------------------------------> This message is sent to you because you are subscribed to> the mailing list .> To unsubscribe, E-mail to: > To switch to the DIGEST mode, E-mail to> Web Archive of this list is at: http://webdna.smithmicro.com/-------------------------------------------------------------This message is sent to you because you are subscribed to the mailing list .To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://webdna.smithmicro.com/ Associated Messages, from the most recent to the oldest:

Re: grep is really pathetic sometimes ( John Peacock 2003) Re: grep is really pathetic sometimes ( "Rajeev Kumar" 2003) Re: grep is really pathetic sometimes ( John Peacock 2003) Re: grep is really pathetic sometimes ( "Rajeev Kumar" 2003) RFE: grep is really pathetic sometimes ( John Peacock 2003)

Hi John,I tried that same code:>> code:[Text show=T]SKU=TROUTPRINT.JPG[/Text]

[grepsearch=^([A-Z0-9][0-9A-Z])([0-9A-Z][0-9A-Z][0-9A-Z])&replace=\1/\2/][getchars start=1&end=5][SKU][/getchars][/grep]>> output:TROUTPRINT.JPGTR/OUT/Raj----- Original Message ----- From: "John Peacock" To: "WebDNA Talk" Sent: Wednesday, June 25, 2003 2:10 AMSubject: RFE: grep is really pathetic sometimes> > I love using regular expressions to process my text (which is why I spendmost> of my time using Perl these days). However, one of my other developerscame to> me to ask why a particular grep was working the way it was.>> The code is as follows:>> [grep>search=^([A-Z0-9][0-9A-Z])([0-9A-Z][0-9A-Z][0-9A-Z])&replace=\1/\2/][getchars> start=1&end=5][SKU][/getchars][/grep]>> That *should* match the first two characters (as \1) and the next three(as \2).> It always seemed to work when we were only looking at numbers, but wehad to> extend it to work with characters as well as and it suddenly startedmatching> twice for one item.>> For SKU=TROUTPRINT.JPG, we expected it to return "TR/OUT/", but it wouldreturn> "TR/OUT/PR/INT" instead. It turns out that [grep] doesn't understand the> beginning of line (BOL) anchor "^" character. Consequently, the patternwas> matching twice (because this item had a longer SKU than the other items).This> is very annoying and vastly reduces the usabililty of [grep] for me.>> Why couldn't WebCat provide a real regex engine like Perl CompatibleRegular> Expressions:>> http://www.pcre.org/>> instead of whatever hodgepodge of code it currently has? At the veryleast,> WebCat should have thrown some sort of an error for the "^" which itdoesn't> understand.> >> John>> -- > John Peacock> Director of Information Research and Technology> Rowman & Littlefield Publishing Group> 4501 Forbes Boulevard> Suite H> Lanham, MD 20706> 301-459-3366 x.5010> fax 301-429-5748>>> -------------------------------------------------------------> This message is sent to you because you are subscribed to> the mailing list .> To unsubscribe, E-mail to: > To switch to the DIGEST mode, E-mail to> Web Archive of this list is at: http://webdna.smithmicro.com/-------------------------------------------------------------This message is sent to you because you are subscribed to the mailing list .To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://webdna.smithmicro.com/ "Rajeev Kumar"

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