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Re^2: Replacing string with regexp without using modules

by cowgirl (Acolyte)
on Aug 06, 2008 at 00:37 UTC ( #702529=note: print w/ replies, xml ) Need Help??


in reply to Re: Replacing string with regexp without using modules
in thread Replacing string with regexp without using modules

Thanks for the great reply. It works well. However when I cut it down to this, it doesn't work:

$string = '$a $b $c'; $hash{a} = "go"; $string =~ s{\$(\w+)}{$$hash{$1}}ge;
Could it be the hash reference you use to the subroutine? \$hash ? Thanks.


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Re^3: Replacing string with regexp without using modules
by almut (Canon) on Aug 06, 2008 at 01:58 UTC
    Could it be the hash reference ...?

    Yes, in pc88mxer's code, $hash is a hash reference, so it must be dereferenced. In your case, it's a normal hash.  So either don't dereference

    $hash{a} = "go"; $string =~ s{\$(\w+)}{$hash{$1}}ge;

    or create a reference

    $hash->{a} = "go"; $string =~ s{\$(\w+)}{$$hash{$1}}ge;

    or even use the normal arrow syntax in both the assignment $hash->{a} = ..., and when you access it $hash->{$1}:

    $hash->{a} = "go"; $string =~ s{\$(\w+)}{$hash->{$1}}ge;

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