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view 2-Io/day2-operators.io @ 37:86668d32e162
Add Day 2 code
author | IBBoard <dev@ibboard.co.uk> |
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date | Tue, 12 Sep 2017 20:58:51 +0100 |
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# Operators are syntactic sugar and can be listed from a table: OperatorTable println # Creating an operator involves defining it with a precedence # (index based on the output from the previous table) OperatorTable addOperator("xor", 11) # And then implementing it on appropriate prototypes # Note that Io is open-edit, like Ruby, so we can screw with core stuff # like Booleans and extend them true xor := method(bool, if(bool, false, true)) false xor := method(bool, if(bool, true, false)) # For some reason I have to work out, the prints don't work here # They print the second value. But running in REPL works and return correct # value (before printing wrong one) (true xor true) println (true xor false) println (false xor true) println (false xor false) println