! Aware to Perl: How can I expand variables in text strings?

How can I expand variables in text strings?

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Let's assume that you have a string like:

    $text = 'this has a $foo in it and a $bar';
    $text =~ s/\$(\w+)/${$1}/g;

Before version 5 of perl, this had to be done with a double-eval substitution:

    $text =~ s/(\$\w+)/$1/eeg;

Which is bizarre enough that you'll probably actually need an EEG afterwards. :-)

See also ``How do I expand function calls in a string?'' in this section of the FAQ.

Source: Perl FAQ: Data Manipulation
Copyright: Copyright (c) 1997 Tom Christiansen and Nathan Torkington.

(Corrections, notes, and links courtesy of RocketAware.com)

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