Stories
Slash Boxes
Comments

NOTE: use Perl; is on undef hiatus. You can read content, but you can't post it. More info will be forthcoming forthcomingly.

use Perl

All the Perl that's Practical to Extract and Report

Hash interpolation failure in string More | Login | Reply

The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.

Without JavaScript enabled, you might want to use the classic discussion system instead. If you login, you can remember this preference.

Single quoted variable (Score:2)

by Matts (1087)

Surely:

is "$french_for{'$num'}", 'un', 'single quoted variable key';

Will fail. You've single quoted '$num' hence you're looking for the key "\$num".
- Re:Single quoted variable (Score:2)
  
  by Ovid (2709)
  
  Yes, that's the failure, but I don't know why that should be obvious because if you add diag "'$num'" to the end of that script, you get this:
  
  # 'one'
  
  In other words, a variable in single quotes will interpolate if it's embedded in a double quoted string but not used as the key to a hash or an index into an array. That seems a bit odd and it would be nice if it were documented better. I should submit a patch for perltrap if it's not documented.
  - Re:Single quoted variable (Score:2)
    
    by Matts (1087) on 2006.07.31 8:39 (#49092) Journal
    
    I tend to consider hash interpolation as being outside of the string, even though it's embedded. I consider there to be an invisible ". and ." around it.
    
    Reply to This
    
    Parent

Get More Comments

Stories, comments, journals, and other submissions on use Perl; are Copyright 1998-2006, their respective owners.