[ 源代码： libbest-perl ]
软件包：libbest-perl（0.15-3）
fallbackable module loader
Best.pm attempts to load Perl modules from a list, stopping at the first successful load and failing only if no alternative was found.
Often there are several possible providers of some functionality your program needs, but you don't know which is available at the run site. For example, one of the modules may be implemented with XS, or not in the core Perl distribution and thus not necessarily installed. With Best.pm, this can be as simple as:
use Best qw/YAML::Syck YAML/;