August 20th, 2012

if a ^ b

What the hell is that carrot doing there? ….It’s an “exclusive or”.

It’s the same as saying:

(a && !b) || (!a && b)

which also means…

a | b |
0 | 0 | f
0 | 1 | t
1 | 0 | t
1 | 1 | f

Damn, useful… sometimes.

Entry Filed under: Professional,Ruby on Rails

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