RE: Regex ex question. How to match NOT this string.
So the JDK uses Perl which is why my lookbehind worked in my class, and then CF uses a proprietary version of Perl's implementation. I wouldn't say proprietary, I'd say incomplete. Perl's Regular Expressions are extremely powerful and complex, from what I've seen. I get lost pretty quickly looking at the full documentation for them, but the perlrequick or perlretut man pages are pretty simple, yet still incomplete. I guess the CF team decided they could please most developers with a subset of Perl's syntax, and I'd say I have yet to find a problem that CF's regex wouldn't solve, in my limited experience. :) - This transmission may contain information that is privileged, confidential and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. A1. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228851 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Regex ex question. How to match NOT this string.
Thanks for the investigating, Jacob. So the JDK uses Perl which is why my lookbehind worked in my class, and then CF uses a proprietary version of Perl's implementation. Something just doesn't feel right about all that... just not sure what. Well, no matter. You're right that tinkering with how you structure your pattern, you can mimic the [negative/positive] lookbehind function. -Original Message- From: Munson, Jacob [mailto:[EMAIL PROTECTED] Sent: Friday, January 06, 2006 6:04 PM To: CF-Talk Subject: RE: Regex ex question. How to match NOT this string. I just looked in my Advanced Macromedia ColdFusion MX 7 Application Development book (what a title! ;)), written by Ben Forta and a bunch of other folks, and this paragraph is very on topic: ...these additions make ColdFusion's RegEx support much more powerful, and much closer to the way regular expressions work in Perl, which for many people is the de facto standard for how regular expressions should behave. The additions they are talking about are things like look ahead, word boundaries, escape sequences, etc. Also, this sentence answers our previous question ColdFusion does not support (Perl's) lookbehind processing... Also, it looks like Java uses Perl's syntax as well: http://tinyurl.com/ay8kc ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228693 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Regex ex question. How to match NOT this string.
Ok, ok, so I didn't actually try an example in CF :) CF must use a different RegEx engine than what I'm used to using. The ?! is negative lookbehind because he said he wanted to grab the /organization tag. -Original Message- From: Munson, Jacob [mailto:[EMAIL PROTECTED] Sent: Thursday, January 05, 2006 6:16 PM To: CF-Talk Subject: RE: Regex ex question. How to match NOT this string. Steve, That causes an error. What's the '' in between the '?' and '!' supposed to do (a typo?) Ian, Try this: cfset MyString = /organization title cfset MyResult = ReFind((/organization)(?!\s*title),MyString, 1, yes) cfset MyResult2 = ReFind((/organization)(?!\s*div),MyString, 1, yes) cfoutput#MyResult.pos[1]#br#MyResult2.pos[1]#/cfoutput MyResult = 0 because there was a title tag, MyResult2 = 1 because it looked for a (which wasn't there) div tag.So you could throw that in a CFIF MyResult gt 0, or whatever suits your needs. Is that what you were looking for? ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228653 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Regex ex question. How to match NOT this string.
Ok, this is strange. That RegEx works in Java so CF isn't using the JDK-provided RegEx implementation? Looks like it's using the Perl 5 implementation. Seems counter-productive (if my assumption is correct, of course). Anyway, with that implementation, here's what I came up with. cfscript searchString = /organizationtitle; matchStruct = StructNew(); matchStruct = REFind((/organization)(?=\s*title),searchString,1,true); trueMatch = Mid(searchString, matchStruct.pos[1], matchStruct.len[1]); /cfscript cfdump var=#trueMatch# -Original Message- From: Steve Brownlee [mailto:[EMAIL PROTECTED] Sent: Friday, January 06, 2006 12:07 PM To: CF-Talk Subject: RE: Regex ex question. How to match NOT this string. Ok, ok, so I didn't actually try an example in CF :) CF must use a different RegEx engine than what I'm used to using. The ?! is negative lookbehind because he said he wanted to grab the /organization tag. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228658 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Regex ex question. How to match NOT this string.
I don't think CF supports lookbehind. On 1/6/06, Steve Brownlee [EMAIL PROTECTED] wrote: Ok, this is strange. That RegEx works in Java so CF isn't using the JDK-provided RegEx implementation? Looks like it's using the Perl 5 implementation. Seems counter-productive (if my assumption is correct, of course). Anyway, with that implementation, here's what I came up with. cfscript searchString = /organizationtitle; matchStruct = StructNew(); matchStruct = REFind((/organization)(?=\s*title),searchString,1,true); trueMatch = Mid(searchString, matchStruct.pos[1], matchStruct.len[1]); /cfscript cfdump var=#trueMatch# -Original Message- From: Steve Brownlee [mailto:[EMAIL PROTECTED] Sent: Friday, January 06, 2006 12:07 PM To: CF-Talk Subject: RE: Regex ex question. How to match NOT this string. Ok, ok, so I didn't actually try an example in CF :) CF must use a different RegEx engine than what I'm used to using. The ?! is negative lookbehind because he said he wanted to grab the /organization tag. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228668 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Regex ex question. How to match NOT this string.
You are correct, CF uses Perl's regular expression syntax, and so do a lot of other languages. It seems that a lot of people recognize Perl's regex as one of the best implementations available (and very popular, thus well known) and I'm assuming that's why the CF developers went with it. Fortunately for me, I learned regex in Perl before I tried them in CF. :-D -Original Message- From: Steve Brownlee [mailto:[EMAIL PROTECTED] Sent: Friday, January 06, 2006 10:38 AM To: CF-Talk Subject: RE: Regex ex question. How to match NOT this string. Ok, this is strange. That RegEx works in Java so CF isn't using the JDK-provided RegEx implementation? Looks like it's using the Perl 5 implementation. Seems counter-productive (if my assumption is correct, of course). -- [INFO] -- Access Manager: This transmission may contain information that is privileged, confidential and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. A2 ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228669 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Regex ex question. How to match NOT this string.
Scott and Steve, This is strange, I just looked in my Perl docs; Perl /does/ support look behind: (?=...) zero width positive look behind (?!...) zero width negative look behind I wonder why CF doesn't support this? Maybe because it's totally possible to do it other ways (positive look ahead could be the same as positive look behind, depending on where you put your pattern in the regex). However, if you are used to using look behind, and it's not in CF, that's a let down. I wonder if there are any cases where look behind is absolutely necessary...or is it just a different syntax in CF? Any experts out there know the answer? Mr. Forta or Watts? -Original Message- From: Scott Stroz I don't think CF supports lookbehind. From: Steve Brownlee Ok, this is strange. That RegEx works in Java so CF isn't using the JDK-provided RegEx implementation? Looks like it's using the Perl 5 implementation. Seems counter-productive (if my assumption is correct, of course). -Original Message- From: Steve Brownlee Ok, ok, so I didn't actually try an example in CF :) CF must use a different RegEx engine than what I'm used to using. The ?! is negative lookbehind because he said he wanted to grab the /organization tag. [INFO] -- Access Manager: This transmission may contain information that is privileged, confidential and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. A2 ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228672 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Regex ex question. How to match NOT this string.
I just looked in my Advanced Macromedia ColdFusion MX 7 Application Development book (what a title! ;)), written by Ben Forta and a bunch of other folks, and this paragraph is very on topic: ...these additions make ColdFusion's RegEx support much more powerful, and much closer to the way regular expressions work in Perl, which for many people is the de facto standard for how regular expressions should behave. The additions they are talking about are things like look ahead, word boundaries, escape sequences, etc. Also, this sentence answers our previous question ColdFusion does not support (Perl's) lookbehind processing... Also, it looks like Java uses Perl's syntax as well: http://tinyurl.com/ay8kc From: Munson, Jacob Scott and Steve, This is strange, I just looked in my Perl docs; Perl /does/ support look behind: (?=...) zero width positive look behind (?!...) zero width negative look behind I wonder why CF doesn't support this? Maybe because it's totally possible to do it other ways (positive look ahead could be the same as positive look behind, depending on where you put your pattern in the regex). However, if you are used to using look behind, and it's not in CF, that's a let down. I wonder if there are any cases where look behind is absolutely necessary...or is it just a different syntax in CF? Any experts out there know the answer? Mr. Forta or Watts? -Original Message- From: Scott Stroz I don't think CF supports lookbehind. From: Steve Brownlee Ok, this is strange. That RegEx works in Java so CF isn't using the JDK-provided RegEx implementation? Looks like it's using the Perl 5 implementation. Seems counter-productive (if my assumption is correct, of course). This transmission may contain information that is privileged, confidential and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. A1. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228681 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Regex ex question. How to match NOT this string.
How can I find any /organization that is not followed by an title with or without any amount or types of white space between them? -- Ian Skinner Web Programmer BloodSource www.BloodSource.org Sacramento, CA C code. C code run. Run code run. Please! - Cynthia Dunning Confidentiality Notice: This message including any attachments is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender and delete any copies of this message. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228563 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Regex ex question. How to match NOT this string.
I am a bit rusty, but maybe something along this line: (/organization)(?=!\s*title) This might not be the correct syntax, but I mean to say find /organization if only there is a negative look ahead for the expression \s*title. This might help spark some other people's better answers. -ben ... Ben Nadel Web Developer Nylon Technology 350 7th Ave. Suite 1005 New York, NY 10001 212.691.1134 x 14 212.691.3477 fax www.nylontechnology.com Sanders: Lightspeed too slow? Helmet: Yes we'll have to go right to ludacris speed. -Original Message- From: Ian Skinner [mailto:[EMAIL PROTECTED] Sent: Thursday, January 05, 2006 4:44 PM To: CF-Talk Subject: Regex ex question. How to match NOT this string. How can I find any /organization that is not followed by an title with or without any amount or types of white space between them? -- Ian Skinner Web Programmer BloodSource www.BloodSource.org Sacramento, CA C code. C code run. Run code run. Please! - Cynthia Dunning Confidentiality Notice: This message including any attachments is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender and delete any copies of this message. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228570 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Regex ex question. How to match NOT this string.
Just one correction (/organization)(?!\s*title) -Original Message- From: Ben Nadel [mailto:[EMAIL PROTECTED] Sent: Thursday, January 05, 2006 5:23 PM To: CF-Talk Subject: RE: Regex ex question. How to match NOT this string. I am a bit rusty, but maybe something along this line: (/organization)(?=!\s*title) This might not be the correct syntax, but I mean to say find /organization if only there is a negative look ahead for the expression \s*title. This might help spark some other people's better answers. -ben ... Ben Nadel Web Developer Nylon Technology 350 7th Ave. Suite 1005 New York, NY 10001 212.691.1134 x 14 212.691.3477 fax www.nylontechnology.com Sanders: Lightspeed too slow? Helmet: Yes we'll have to go right to ludacris speed. -Original Message- From: Ian Skinner [mailto:[EMAIL PROTECTED] Sent: Thursday, January 05, 2006 4:44 PM To: CF-Talk Subject: Regex ex question. How to match NOT this string. How can I find any /organization that is not followed by an title with or without any amount or types of white space between them? -- Ian Skinner Web Programmer BloodSource www.BloodSource.org Sacramento, CA C code. C code run. Run code run. Please! - Cynthia Dunning Confidentiality Notice: This message including any attachments is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender and delete any copies of this message. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228571 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: Regex ex question. How to match NOT this string.
Steve, That causes an error. What's the '' in between the '?' and '!' supposed to do (a typo?) Ian, Try this: cfset MyString = /organization title cfset MyResult = ReFind((/organization)(?!\s*title),MyString, 1, yes) cfset MyResult2 = ReFind((/organization)(?!\s*div),MyString, 1, yes) cfoutput#MyResult.pos[1]#br#MyResult2.pos[1]#/cfoutput MyResult = 0 because there was a title tag, MyResult2 = 1 because it looked for a (which wasn't there) div tag.So you could throw that in a CFIF MyResult gt 0, or whatever suits your needs. Is that what you were looking for? -Original Message- From: Steve Brownlee [mailto:[EMAIL PROTECTED] Sent: Thursday, January 05, 2006 3:27 PM To: CF-Talk Subject: RE: Regex ex question. How to match NOT this string. Just one correction (/organization)(?!\s*title) -Original Message- From: Ben Nadel [mailto:[EMAIL PROTECTED] Sent: Thursday, January 05, 2006 5:23 PM To: CF-Talk Subject: RE: Regex ex question. How to match NOT this string. I am a bit rusty, but maybe something along this line: (/organization)(?=!\s*title) This might not be the correct syntax, but I mean to say find /organization if only there is a negative look ahead for the expression \s*title. This might help spark some other people's better answers. This transmission may contain information that is privileged, confidential and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. A1. ~| Message: http://www.houseoffusion.com/lists.cfm/link=i:4:228580 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
