Regex Variable Substitution

micronx2 has asked for the wisdom of the Perl Monks concerning the following question:

Hello!

My regex works, just not on hashes? Any clues?

This works:
$curline = '...[$variable]...'; # example 1
$curline =~ s/\[\$(.+?)\]/$$1/g;

This doesn't:
$curline = '...[$hash{'constant'}]...'; # example 2
$curline =~ s/\[\$(.+?)\]/$$1/g;
[download]

How should I be going about this?
Thanks,
Steve

Comment on Regex Variable Substitution Download Code

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Re: Regex Variable Substitution by Prior Nacre V (Hermit) on Aug 06, 2004 at 21:29 UTC
In the # example 2 line you have 4 single quotes - that's your problem. If you had used strict and warnings - Perl would have told you this. Change $hash{'constant'} to one of: `$hash{constant} $hash{q(constant)} $hash{"constant"} $hash{qq(constant)}` [download] Regards, PN5	[reply] [d/l]
Re: Regex Variable Substitution by ysth (Canon) on Aug 06, 2004 at 21:34 UTC
`s/\[\$(.+?)\]/$1/eeg;`	[reply] [d/l]