|
class Hash
def grep(pattern)
inject([]) do |res, kv|
res << kv if kv[0] =~ pattern or kv[1] =~ pattern
res
end
end
end
h = { "apple tree" => "plant", "ficus" => "plant",
"shrew" => "animal", "plesiosaur" => "animal" }
p h.grep(/pl/)
p h.grep(/plant/) # => [["ficus", "plant"], ["apple tree", "plant"]]
p h.grep(/i.*u/) # => [["ficus", "plant"], ["plesiosaur", "animal"]]
|