Re: how to read perl variable from a line read from a file

in reply to how to read perl variable from a line read from a file

Hello Bharath666, and welcome to the Monastery!

As parv says, one approach is to use eval:

#! perl
use Modern::Perl;

my ($VAR1, $VAR2);
my  $INST = 'C';

while (<DATA>)
{
    chomp;

    if (/ ^ ([^=]*?) = (.*) $ /x)
    {
        my ($lhs, $rhs) = ($1, $2);
        eval '$' . $lhs . ' = "' . $rhs . '";';
        warn $@ if $@;
    }
}

say for $VAR1, $VAR2;

__DATA__
VAR1=$INST/dirivebase/program
VAR2=$INST/origbase/data
[download]

Output:

22:54 >perl 513_SoPW.pl
C/dirivebase/program
C/origbase/data

23:07 >
[download]

The problem with this ‘solution’ is that the code is tightly-bound to the exact form of the input data, making it brittle and inflexible. I have to say, you will be better-off re-examining the broader problems your code is addressing, and then re-thinking your general strategy.

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

Comment on Re: how to read perl variable from a line read from a file Select or Download Code

In Section Seekers of Perl Wisdom