Extended maintenance of Ruby 1.9.3 ended on February 23, 2015. Read more
Hash with completion search feature. See OptionParser::Completion.
Completion for hash key.
# File optparse.rb, line 719
def match(key)
*values = fetch(key) {
raise AmbiguousArgument, catch(:ambiguous) {return complete(key)}
}
return key, *values
end