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asterite/is_a_t_class.cr

Last active August 29, 2015 14:13
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is_a_t_class.cr
class Array
def foo
if T.is_a?(Int32.class)
"Int!"
else
"Other!"
end
end
end
puts [1, 2, 3].foo #=> "Int!"
puts ["hey"].foo #=> "Other!"
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