diff options
| -rw-r--r-- | mrbgems/mruby-hash-ext/mrblib/hash.rb | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/mrbgems/mruby-hash-ext/mrblib/hash.rb b/mrbgems/mruby-hash-ext/mrblib/hash.rb index 73d1fbe6d..7bf06a0ad 100644 --- a/mrbgems/mruby-hash-ext/mrblib/hash.rb +++ b/mrbgems/mruby-hash-ext/mrblib/hash.rb @@ -474,4 +474,25 @@ class Hash end self end + + ## + # call-seq: + # hsh.fetch_values(key, ...) -> array + # hsh.fetch_values(key, ...) { |key| block } -> array + # + # Returns an array containing the values associated with the given keys + # but also raises <code>KeyError</code> when one of keys can't be found. + # Also see <code>Hash#values_at</code> and <code>Hash#fetch</code>. + # + # h = { "cat" => "feline", "dog" => "canine", "cow" => "bovine" } + # + # h.fetch_values("cow", "cat") #=> ["bovine", "feline"] + # h.fetch_values("cow", "bird") # raises KeyError + # h.fetch_values("cow", "bird") { |k| k.upcase } #=> ["bovine", "BIRD"] + # + def fetch_values(*keys, &block) + keys.map do |k| + self.fetch(k, &block) + end + end end |