Created
November 22, 2013 16:19
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extendで追加されたメソッドを削除したい
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module M | |
def m | |
:M | |
end | |
end | |
class C | |
def m | |
:C | |
end | |
end | |
c = C.new | |
c.extend M | |
c.m #=> :M | |
# ここで M 由来の m を削除して、 | |
# c.m で C の m が呼ばれて :C が返されるようにしたいのだけれど・・・ | |
# 今は extend する前に c.method(:m) を保存しておいて、 | |
# 再度 define_method :m でそれを呼び出すっていうふうにしている | |
c2 = C.new | |
m2 = c2.method(:m) | |
c2.extend M | |
c2.m #=> :M | |
c2.singleton_class.class_eval do | |
define_method :m do | |
m2.call | |
end | |
end | |
c2.m #=> :C |
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