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Re^3: You don't always have to use regexes

by bmann (Priest)
on Feb 24, 2005 at 23:41 UTC ( [id://434312]=note: print w/replies, xml ) Need Help??


in reply to Re^2: You don't always have to use regexes
in thread You don't always have to use regexes

And to support your point, an invariant string inside double-quotes gets compiled down to a single quoted string. Any time wasted is not wasted at run-time.

$cat print.pl
print 'Hello';
print "Hello";    # compiles to 'Hello'
print "Hello $_";

$perl -MO=Deparse print.pl
print 'Hello';
print 'Hello';
print "Hello $_";
print.pl syntax OK

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5.005_03, 5.6.1 and 5.8.4 produce identical results.

Replies are listed 'Best First'.
Re^4: You don't always have to use regexes
by Ven'Tatsu (Deacon) on Feb 25, 2005 at 14:28 UTC
    Minor nitpick, if your going to use B::Deparse to show how perl handles strings internaly consider using the -q option. From B::Deparse:
    Expand double-quoted strings into the corresponding combinations of concatenation, uc, ucfirst, lc, lcfirst, quotemeta, and join. ...
    Note that the expanded form represents the way perl handles such constructions internally -- this option actually turns off the reverse translation that B::Deparse usually does. 
    $perl -MO=Deparse,-q print.pl
print 'Hello';
print 'Hello';
print 'Hello ' . $_;
print.pl syntax OK

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