| ||
Tue 2024-04-23
Fri 2024-04-19
Thu 2024-04-18
Mon 2024-04-15
Butterick’s Practical Typography Sat 2024-04-13
Fri 2024-04-12
Wed 2024-04-10
Boy Meets Boy Meets Boys’ Love Tue 2024-04-09
Mon 2024-04-08
Search
Archives
2023
12 11 10 09 08 07 06 05 04 03 02 01
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
One good site
MDN
Nelson Minar
Blog licensed under a Creative Commons License
|
Perl just keeps getting better and better. Consider the following
simple code:
#!/usr/bin/perl -w
In Perl 5.6 this prints foo as expected. In Perl 5.8 (Debian
5.8.0-17) this prints foofooSTRIP.
$foo = "fooSTRIP"; $foo =~ s/STRIP//e; print $foo Huh? My friends who like Perl claim that what's going on is that Perl is evaluating the right part of the s/STRIP//e, which is empty, as a Perl expression. And apparently in Perl 5.8 this empty expression doesn't evaluate to, say, an empty string. No, it evaluates to some previous expression's value. The lack of a warning may be a bug. My fear is some Perlmonger decided that the empty expression evaluating to something non-empty is a feature. PS - yes, I know the /e is unnecessary here and removing it fixes my problem. |
|
