RE: Ben Doom (was please do my work for me)
Ben, I've seen answers like this to other questions as well. I have never quite understood what is taking place. Do you mind spending a couple of minutes to explain what .*pcode=([^]+).*, \1 does? Thanks, Brian Yager President - North AL Cold Fusion Users Group http://www.nacfug.com Sr. Systems Analyst Sverdrup/CIC [EMAIL PROTECTED] (256) 842-8342 -Original Message- From: Ben Doom [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 25, 2002 4:54 PM To: CF-Talk Subject: RE: please do my work for me I'm assuming this is a link somewhere in some content you're cfhttp-ing, or you'd just use url.pCode. Anyhow, pcode = rereplacenocase(url, .*pcode=([^]+).*, \1) Happy regexing. --Ben Doom Programmer General Lackey Moonbow Software : -Original Message- : From: Cantrell, Adam [mailto:[EMAIL PROTECTED]] : Sent: Wednesday, September 25, 2002 5:38 PM : To: CF-Talk : Subject: please do my work for me : : : I want to extract a value from a URL variable which can show up : anywhere in : the URL. Here are some examples, I would want the pCode value which will : always be an integer of varying length: : : index.htm?var1=23pCode=100othervar=hello return 100 : : index.htm?pCode=1 --- return 1 : : index.htm?someVariabl=hiTheresomeothervariable=45pCode=00343223234322 : - return 00343223234322 : : If somebody can tell me the right regular expression (or if a regular : expression isn't even needed, but just some combination of CF functions) : that would be GREAT! : : Adam. : : __ Signup for the Fusion Authority news alert and keep up with the latest news in ColdFusion and related topics. http://www.fusionauthority.com/signup.cfm FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: Ben Doom (was please do my work for me)
: I've seen answers like this to other questions as well. I have : never quite : understood what is taking place. Do you mind spending a couple : of minutes to : explain what .*pcode=([^]+).*, \1 does? Well, the 'pcode=' bit ought to be obvious. All it does is find that literal substring in the string we're searching. '[^]' matches any single character except the ampersand -- the [] brackets delimit a character class and the ^carat means to negate the character class. So [abc] would match a, b, or c but not d or 7 and [^abc] would match d and 7 but not a b or c. '[^]+' means at least one not-, and as many as you can find in a row. Putting parans around it means remember me. The '.' (period or dot) is a wildcard -- it matches /anything/ and the '*' asterisk means as many as you can match. So the '.*' at the beginning and end of the regex serve to grab everything before and after the part we want to recognize. We replace it with '\1' which means the first backreference which is the first bit in parens (well, the only bit in parens) so we're replacing the entire string with everything between 'pcode=' and either the very next '' it comes across or the end of the string, whichever is first. I subscribe to the CF-Regex list, and you should, too. :-) You can subscribe here: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=21 We've got an interesting session going over there about stripping or keeping tags based on a list, and S. Isaac Dealey has written a UDF based on suggestions from the group. If you're interested in learning how to use Regex to do some of your heavy lifting, come join us. --Ben Doom Programmer General Lackey Moonbow Software __ This list and all House of Fusion resources hosted by CFHosting.com. The place for dependable ColdFusion Hosting. FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: Ben Doom (was please do my work for me)
Brian - It's a regular expression. It says, find a part of the string that starts with 'pcode=' and is followed by 0 or many characters that are you which could be followed by anthing else. How's that? Mike Wokasch UW-Extension At 09:06 AM 9/26/2002 -0500, you wrote: Ben, I've seen answers like this to other questions as well. I have never quite understood what is taking place. Do you mind spending a couple of minutes to explain what .*pcode=([^]+).*, \1 does? Thanks, Brian Yager President - North AL Cold Fusion Users Group http://www.nacfug.com Sr. Systems Analyst Sverdrup/CIC [EMAIL PROTECTED] (256) 842-8342 -Original Message- From: Ben Doom [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 25, 2002 4:54 PM To: CF-Talk Subject: RE: please do my work for me I'm assuming this is a link somewhere in some content you're cfhttp-ing, or you'd just use url.pCode. Anyhow, pcode = rereplacenocase(url, .*pcode=([^]+).*, \1) Happy regexing. --Ben Doom Programmer General Lackey Moonbow Software : -Original Message- : From: Cantrell, Adam [mailto:[EMAIL PROTECTED]] : Sent: Wednesday, September 25, 2002 5:38 PM : To: CF-Talk : Subject: please do my work for me : : : I want to extract a value from a URL variable which can show up : anywhere in : the URL. Here are some examples, I would want the pCode value which will : always be an integer of varying length: : : index.htm?var1=23pCode=100othervar=hello return 100 : : index.htm?pCode=1 --- return 1 : : index.htm?someVariabl=hiTheresomeothervariable=45pCode=00343223234322 : - return 00343223234322 : : If somebody can tell me the right regular expression (or if a regular : expression isn't even needed, but just some combination of CF functions) : that would be GREAT! : : Adam. : : __ Get the mailserver that powers this list at http://www.coolfusion.com FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: Ben Doom (was please do my work for me)
This is a Regular Expression (regex) -- a system of finding and replacing complex strings which originated ( i believe ) with PERL. There's a section of the ColdFusion user's manual titled Using Regular Expressions or something to that effect which gives an explanation of regex and how it works in ColdFusion ( which at least in CF 5 and prior was a little different than in PERL ) ... But to give you a brief example, this expression that ben provided: REReplace(mystring,.*pcode=([^]+).*, \1) The . in the regular expression matches any character, and the * is a modifier which tells the engine to find 0 or more occurrances of the previous character ( or set of characters in [] or subexpression ). The parenthesis are a subexpression, which are used primarily for back-references -- the \1 in the replace statement is a back-expression which means, insert the first subexpression in the replacement string. The [] inside the subexpression denote a set of characters and the ^ inside the set ( which at the beginning of the regex would mean beginning of string ), means not in , so [^] matches all characters which are not . The + like the * matches 1 or more instances of the previous character, set or subexpression. So what you get after all of this is the string 'pcode=', then find any character other than '' after the string 'pcode=' and return that string or subexpression. S. Isaac Dealey Certified Advanced ColdFusion 5 Developer www.turnkey.to 954-776-0046 __ Get the mailserver that powers this list at http://www.coolfusion.com FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: Ben Doom (was please do my work for me)
I'll take a crack at it - then Ben (and everyone else) can correct me. The players: in this place and time, it means any single character * means zero or more pcode=means the literal string pcode= (but since we used rereplacenocase, it could be PCODE= or pCoDe= etc) () in this place and time, it means to capture what's inside it in what is called a backreference [] in this place and time, it means to encapsulate a character class (a group of single characters added together and tested together) ^ in this place and time, it means NOT, as in NOT the symbol means the character + means one or more \1means whatever was inside the first backreference - the stuff inside the first () To read the whole string: Zero or more characters followed by the string pcode= followed by one or more characters that are not the symbol followed by zero or more characters. In an expanded version of your example: index.htm?someVariabl=hiTheresomeothervariable=45pCode=00343223234322yetanothervar=who *index.htm?someVariabl=hiTheresomeothervariable=45 pCode= pcode= ([^]+) 00343223234322 * yetanothervar=who Replace all of the above with the first backreference (which in this case will be 00343223234322) Did this help, or make it more confusing? Jerry Johnson [EMAIL PROTECTED] 09/26/02 10:06AM Ben, I've seen answers like this to other questions as well. I have never quite understood what is taking place. Do you mind spending a couple of minutes to explain what .*pcode=([^]+).*, \1 does? Thanks, Brian Yager President - North AL Cold Fusion Users Group http://www.nacfug.com Sr. Systems Analyst Sverdrup/CIC [EMAIL PROTECTED] (256) 842-8342 -Original Message- From: Ben Doom [mailto:[EMAIL PROTECTED]] Sent: Wednesday, September 25, 2002 4:54 PM To: CF-Talk Subject: RE: please do my work for me I'm assuming this is a link somewhere in some content you're cfhttp-ing, or you'd just use url.pCode. Anyhow, pcode = rereplacenocase(url, .*pcode=([^]+).*, \1) Happy regexing. --Ben Doom Programmer General Lackey Moonbow Software : -Original Message- : From: Cantrell, Adam [mailto:[EMAIL PROTECTED]] : Sent: Wednesday, September 25, 2002 5:38 PM : To: CF-Talk : Subject: please do my work for me : : : I want to extract a value from a URL variable which can show up : anywhere in : the URL. Here are some examples, I would want the pCode value which will : always be an integer of varying length: : : index.htm?var1=23pCode=100othervar=hello return 100 : : index.htm?pCode=1 --- return 1 : : index.htm?someVariabl=hiTheresomeothervariable=45pCode=00343223234322 : - return 00343223234322 : : If somebody can tell me the right regular expression (or if a regular : expression isn't even needed, but just some combination of CF functions) : that would be GREAT! : : Adam. : : __ Get the mailserver that powers this list at http://www.coolfusion.com FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: Ben Doom (was please do my work for me)
Thanks Ben...I think I will join. Brian Yager President - North AL Cold Fusion Users Group http://www.nacfug.com Sr. Systems Analyst Sverdrup/CIC [EMAIL PROTECTED] (256) 842-8342 -Original Message- From: Ben Doom [mailto:[EMAIL PROTECTED]] Sent: Thursday, September 26, 2002 9:21 AM To: CF-Talk Subject: RE: Ben Doom (was please do my work for me) : I've seen answers like this to other questions as well. I have : never quite : understood what is taking place. Do you mind spending a couple : of minutes to : explain what .*pcode=([^]+).*, \1 does? Well, the 'pcode=' bit ought to be obvious. All it does is find that literal substring in the string we're searching. '[^]' matches any single character except the ampersand -- the [] brackets delimit a character class and the ^carat means to negate the character class. So [abc] would match a, b, or c but not d or 7 and [^abc] would match d and 7 but not a b or c. '[^]+' means at least one not-, and as many as you can find in a row. Putting parans around it means remember me. The '.' (period or dot) is a wildcard -- it matches /anything/ and the '*' asterisk means as many as you can match. So the '.*' at the beginning and end of the regex serve to grab everything before and after the part we want to recognize. We replace it with '\1' which means the first backreference which is the first bit in parens (well, the only bit in parens) so we're replacing the entire string with everything between 'pcode=' and either the very next '' it comes across or the end of the string, whichever is first. I subscribe to the CF-Regex list, and you should, too. :-) You can subscribe here: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=21 We've got an interesting session going over there about stripping or keeping tags based on a list, and S. Isaac Dealey has written a UDF based on suggestions from the group. If you're interested in learning how to use Regex to do some of your heavy lifting, come join us. --Ben Doom Programmer General Lackey Moonbow Software __ Signup for the Fusion Authority news alert and keep up with the latest news in ColdFusion and related topics. http://www.fusionauthority.com/signup.cfm FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
RE: Ben Doom (was please do my work for me)
I subscribe to the CF-Regex list, and you should, too. :-) You can subscribe here: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=21 We've got an interesting session going over there about stripping or keeping tags based on a list, and S. Isaac Dealey has written a UDF based on suggestions from the group. If you're interested in learning how to use Regex to do some of your heavy lifting, come join us. Now why didn't I remember to plug the group? :) S. Isaac Dealey Certified Advanced ColdFusion 5 Developer www.turnkey.to 954-776-0046 __ Signup for the Fusion Authority news alert and keep up with the latest news in ColdFusion and related topics. http://www.fusionauthority.com/signup.cfm FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/cf-talk@houseoffusion.com/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
