What is the use of s { } { }

[Subra]

Hi,

Can any one tell me, whats does the "s { } { }" operator used for in
the below code ?

next unless s{^(\s*\w+\s+$stat_pid\s+(\d+)\s+)\d+\s+.*$pattern$}
{$1};

this is used to search for a existence of the process through ps -ef.

Best Regards,
Subra...

 

[dilbert1999]

Can any one tell me, whats does the "s { } { }" operator used for

see perldoc perlop, section "Regexp Quote-Like Operators", s/PATTERN/
REPLACEMENT/msixpogce

in the below code ?

next unless s{^(\s*\w+\s+$stat_pid\s+(\d+)\s+)\d+\s+.*$pattern$}
{$1};

see perldoc perlre

 

[xhoster]

Hi,

Can any one tell me, whats does the "s { } { }" operator used for in
the below code ?

It is the same thing as the much more common "s///", just with different
delimiters.

Xho

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[Jürgen Exner]

Can any one tell me, whats does the "s { } { }" operator used for in
the below code ?

next unless s{^(\s*\w+\s+$stat_pid\s+(\d+)\s+)\d+\s+.*$pattern$}
{$1};

It is substitution whatever was matched by the RE
^(\s*\w+\s+$stat_pid\s+(\d+)\s+)\d+\s+.*$pattern$
with the actual text that was matched by
(\s*\w+\s+$stat_pid\s+(\d+)\s+)

In short: it is removing some trailing text.

jue