Created
February 16, 2011 19:49
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define_method hello, world!
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| def add_method(obj, mod, &blk) | |
| obj.class_eval { define_method(mod, &blk) } | |
| end | |
| add_method(String, :greet) { "Hello, #{self}" } | |
| "world".greet #=> "Hello, world!" |
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