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deque-blog/MoneyKentBeckDefect.hs

Created August 14, 2017 11:56
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MoneyKentBeckDefect.hs
let x = add (add a (multiply b 2)) c -- (a + b * 2) + c
let y = add a (add (multiply b 2) c) -- a + (b * 2 + c)
x == y -- Testing equality
> False -- Not what we expect
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