Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris
 
PerlMonks  

Re: Get condition for "if statement" from file

by Utilitarian (Vicar)
on Nov 20, 2012 at 08:51 UTC ( #1004678=note: print w/replies, xml ) Need Help??


in reply to Get condition for "if statement" from file

You need to evaluate the statements as though they were part of your program rather than data:
#!/usr/bin/perl use strict; use warnings; { my $a = 20; my $b = 20; my $c = 'dog'; open IN, "<", 'tmp/tmp.dat' or die "can't open file\n"; while (my $line = <IN>){ my $statement = $line; chomp ($statement); print "$statement\n"; ##Less confusing? if (eval($statement)){ print "true\n"; } } }
WARNING eval is a HUGE security risk and anything can happen if you don't have rigid control over the input
print "Good ",qw(night morning afternoon evening)[(localtime)[2]/6]," fellow monks."

Replies are listed 'Best First'.
Re^2: Get condition for "if statement" from file
by mrguy123 (Hermit) on Nov 20, 2012 at 09:23 UTC
    Worked like a charm, thanks for your help!!

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1004678]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others meditating upon the Monastery: (4)
As of 2016-10-01 20:19 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    How many different varieties (color, size, etc) of socks do you have in your sock drawer?






    Results (7 votes). Check out past polls.