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Regular Expressions

 
GeneralRe: Regex before match Pin
moxol21-Jul-22 2:00
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GeneralRe: Regex before match Pin
jsc4221-Jul-22 2:56
professionaljsc4221-Jul-22 2:56 
GeneralRe: Regex before match Pin
moxol21-Jul-22 3:55
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QuestionPerl regex anchor merely matches at the position of the end of previous match period Pin
marbooth18-Jul-22 6:23
Membermarbooth18-Jul-22 6:23 
AnswerRe: Perl regex anchor merely matches at the position of the end of previous match period Pin
marbooth18-Jul-22 17:18
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GeneralRe: Perl regex anchor merely matches at the position of the end of previous match period Pin
RedDk20-Jul-22 6:23
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QuestionIsn't ?= needless? Pin
Member 1570882016-Jul-22 22:38
MemberMember 1570882016-Jul-22 22:38 
AnswerRe: Isn't ?= needless? Pin
Dave Kreskowiak17-Jul-22 6:28
mveDave Kreskowiak17-Jul-22 6:28 
No, they are not the same. You proved it yourself with your own experiment.

Is it useful? In your example, that depends on the context in which the expression is being used.

There's a good read on the "look ahead asseertion" at Regex Tutorial - Lookahead and Lookbehind Zero-Length Assertions[^].

GeneralRe: Isn't ?= needless? Pin
Member 1570882019-Jul-22 21:48
MemberMember 1570882019-Jul-22 21:48 
GeneralRe: Isn't ?= needless? Pin
Dave Kreskowiak20-Jul-22 3:41
mveDave Kreskowiak20-Jul-22 3:41 
Questionregex code assistance for entering 600 in a input field Pin
Member 1568365422-Jun-22 4:13
MemberMember 1568365422-Jun-22 4:13 
QuestionRe: regex code assistance for entering 600 in a input field Pin
Richard MacCutchan22-Jun-22 5:39
mveRichard MacCutchan22-Jun-22 5:39 
AnswerRe: regex code assistance for entering 600 in a input field Pin
Member 1568365422-Jun-22 6:08
MemberMember 1568365422-Jun-22 6:08 
GeneralRe: regex code assistance for entering 600 in a input field Pin
Richard MacCutchan22-Jun-22 6:49
mveRichard MacCutchan22-Jun-22 6:49 
GeneralRe: regex code assistance for entering 600 in a input field Pin
Member 1568365422-Jun-22 6:58
MemberMember 1568365422-Jun-22 6:58 
GeneralRe: regex code assistance for entering 600 in a input field Pin
Richard Deeming22-Jun-22 21:52
mveRichard Deeming22-Jun-22 21:52 
GeneralRe: regex code assistance for entering 600 in a input field Pin
Richard MacCutchan22-Jun-22 22:08
mveRichard MacCutchan22-Jun-22 22:08 
QuestionPattern Check Match Pin
Member 1567083112-Jun-22 4:17
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AnswerRe: Pattern Check Match Pin
Peter_in_278012-Jun-22 5:05
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GeneralRe: Pattern Check Match Pin
Member 1567083112-Jun-22 6:22
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AnswerRe: Pattern Check Match Pin
OriginalGriff12-Jun-22 6:23
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GeneralRe: Pattern Check Match Pin
Member 1567083112-Jun-22 7:38
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GeneralRe: Pattern Check Match Pin
Member 1567083112-Jun-22 8:13
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GeneralRe: Pattern Check Match Pin
Member 1567083112-Jun-22 7:32
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GeneralRe: Pattern Check Match Pin
Member 1567083112-Jun-22 11:49
MemberMember 1567083112-Jun-22 11:49 

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