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Hash is faster than delegation and simpler to explain

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Sam 2013-03-19 16:08:25 -07:00
parent 1f0b28b069
commit 3da1104ec3
1 changed files with 3 additions and 3 deletions
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6
lib/enum.rb
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@ -1,4 +1,4 @@
class Enum < SimpleDelegator class Enum < Hash
# Public: Initialize an enum. # Public: Initialize an enum.
# #
# members - the array of enum members. May contain a hash of options: # members - the array of enum members. May contain a hash of options:
@ -33,14 +33,14 @@ class Enum < SimpleDelegator
# Public: Create a subset of enum, only include specified keys. # Public: Create a subset of enum, only include specified keys.
def only(*keys) def only(*keys)
dup.tap do |d| dup.tap do |d|
d.__getobj__.keep_if { |k| keys.include?(k) } d.keep_if { |k| keys.include?(k) }
end end
end end
# Public: Create a subset of enum, preserve all items but specified ones. # Public: Create a subset of enum, preserve all items but specified ones.
def except(*keys) def except(*keys)
dup.tap do |d| dup.tap do |d|
d.__getobj__.delete_if { |k| keys.include?(k) } d.delete_if { |k| keys.include?(k) }
end end
end end
end end