怎么可能在日期/ Manip.pm的代码块从Date::Manip模块:当我使用Date :: Manip的sortByLength时,为什么会得到“未初始化值”警告?
#*Get rid of a problem with old versions of perl
no strict "vars";
# This sorts from longest to shortest element
sub sortByLength {
return (length $b <=> length $a);
}
use strict "vars";
我得到这样的警告:
Use of uninitialized value in length at /perl/lib/perl5.8/Date/Manip.pm line 244.
这是一个警告,而不是一个错误,它可以通过不传递“undef”到该函数来解决。 – jrockway 2009-08-12 02:40:06