Created
October 25, 2013 21:29
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| module Foo | |
| extend(self) | |
| def foo | |
| "foo" | |
| end | |
| end | |
| Foo.foo | |
| # => "foo" | |
| foo | |
| # NameError: undefined local variable or method `foo' for main:Object | |
| include(Foo) | |
| foo | |
| # => "foo" |
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