The things you ask about are partly about style choices.

Equivalent: 

do_something() if <condition>;
if (<condition>) { do_something(); }

[download]

Equivalent: 

m[regex]
m|regex|
m/regex/
/regex/

[download]

Equivalent: 

"string-with-expanded-$variables"
qq[string-with-expanded-$variables]
qq/string-with-expanded-$variables/

[download]
Using qq// is common on command lines, since the shell itself may require quotes or double-quotes.

Equivalent: 

'string-expanding-no-variables'
q[string-expanding-no-variables]
q/string-expanding-no-variables/

[download]
All of this can be found in perldoc perlsyn and perldoc perlop.

--
[ e d @ h a l l e y . c c ]

In reply to Re^3: Match Ip Address on cmd line by halley
in thread Match Ip Address on cmd line by sans-clue

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


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