Created
December 18, 2012 17:59
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use === , not kind_of?
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| Boolean = Class.new do | |
| def ===(comp) | |
| comp == true || comp == false | |
| end | |
| end.new |
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| Boolean === 1 #=> false | |
| Boolean === "txt" #=> false | |
| Boolean === true #=> true | |
| Boolean === false #=> true |
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