Beefy Boxes and Bandwidth Generously Provided by pair Networks
P is for Practical
 
PerlMonks  

Re^4: Putting the stringified Regexp object into code

by sedusedan (Monk)
on Nov 06, 2012 at 19:16 UTC ( #1002566=note: print w/ replies, xml ) Need Help??


in reply to Re^3: Putting the stringified Regexp object into code
in thread Putting the stringified Regexp object into code

Please see my reply to Anomalous. I am generating a Perl code in a string, where $re will become literal in the generated code. The qr// can be replaced with m//, but it's rather necessary.


Comment on Re^4: Putting the stringified Regexp object into code
Download Code
Replies are listed 'Best First'.
Re^5: Putting the stringified Regexp object into code
by kennethk (Abbot) on Nov 06, 2012 at 20:56 UTC
    No, it's not necessary -- I said the qr was unnecessary, not qr//.
    #!/usr/bin/perl use strict; use warnings; my $re = qr(/); $re =~ s!/!\\/!g; my $code = "if (\$data =~ /$re/) { blah() }"; my $data = '/'; eval $code; sub blah { print "hi" }

    I understand that you are auto-generating code; perhaps roboticus's response in Re^3: Putting the stringified Regexp object into code will make my point more clearly. There are times when string evaluated code is appropriate, but this would not be a time I'd select it.


    #11929 First ask yourself `How would I do this without a computer?' Then have the computer do it the same way.

      Ah, sorry. You're right of course. I have removed the "qr".

      Also see my response to roboticus. Point taken, but I do want to generate string code in this case. eval()-ing the string is just one, not the only thing, I want to do with the it.

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1002566]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others pondering the Monastery: (8)
As of 2015-07-30 07:37 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (270 votes), past polls