icon Top 9 categories map      RocketAware > Perl >

m//gc does not reset search position on failure

Tips: Browse or Search all pages for efficient awareness of Perl functions, operators, and FAQs.


Search Perl pages


By activity
Professions, Sciences, Humanities, Business, ...

User Interface
Text-based, GUI, Audio, Video, Keyboards, Mouse, Images,...

Text Strings
Conversions, tests, processing, manipulation,...

Integer, Floating point, Matrix, Statistics, Boolean, ...

Algorithms, Memory, Process control, Debugging, ...

Stored Data
Data storage, Integrity, Encryption, Compression, ...

Networks, protocols, Interprocess, Remote, Client Server, ...

Hard World
Timing, Calendar and Clock, Audio, Video, Printer, Controls...

File System
Management, Filtering, File & Directory access, Viewers, ...

m//gc does not reset search position on failure
The m//g match iteration construct has always reset its target string's search position (which is visible through the pos operator) when a match fails; as a result, the next m//g match after a failure starts again at the beginning of the string. With Perl 5.004, this reset may be disabled by adding the ``c'' (for ``continue'') modifier, i.e. m//gc. This feature, in conjunction with the \G zero-width assertion, makes it possible to chain matches together. See the perlop manpage and the perlre manpage.

Source: what's new for perl5.004
Copyright: Larry Wall, et al.
Next: m//x ignores whitespace before ?*+{}

Previous: $_ as Default

(Corrections, notes, and links courtesy of RocketAware.com)

[Overview Topics]

Up to: NUL terminated String Comparison and Search

Rapid-Links: Search | About | Comments | Submit Path: RocketAware > Perl > perldelta/m__gc.htm
RocketAware.com is a service of Mib Software
Copyright 2000, Forrest J. Cavalier III. All Rights Reserved.
We welcome submissions and comments