Ooops, I forgot to use plain text when I sent this the first time. Sorry
if this appears twice.

I want read some variable names and values out of a flat (xml) file and
assign them.


I suppose I could write


$s =3D "$x =3D 23";
eval $s;


Is this the best way? Is there a better way? In lisp, I would use the
set function instead of the setq function to assign a value to a
variable whose name is stored in a string. Is there a counterpart to the
lisp set function in Perl?


Siegfried


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2011/4/26 <siegfried [at] heintze.com>:

>
>
> $s = "$x = 23";
> eval $s;
>
>

eval a string is considered a bad way.
You may store and read the variables to and from a pure Perl data
structure storage, like Tie::Hash.

Regards.

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On 11-04-25 09:20 PM, siegfried [at] heintze.com wrote:
> Is there a counterpart to the
> lisp set function in Perl?

Not really. Consider using a hash instead.

$hash{x} = 23;

To view your data structures, use Data::Dumper;

use Data::Dumper;
print Dumper( \%hash );

Data::Dumper is a standard module that comes with Perl. To see a list
of all the standard pragmatics and modules:

perldoc perlmodlib


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