On 27/07/14 01:42, Matt Gushee wrote: > I can certainly define a custom equality predicate that will do what I > need, but this is bugging me. I guess I don't really understand how > epsilon is supposed to work. The test egg documentation says that > applies to 'inexact comparisons', but I can't find a definition of > 'inexact comparison'. I have also read that '=' may be unreliable for > inexact numbers, but I don't know what else to use. Perhaps 'fp=' from > the Chicken library? Then I would have to ensure that all numbers are > expressed as floats, whereas currently my code has a number of cases > where 1 and 0 are expressed as integers.
As I understand it, the test egg epsilon won't change the behaviour of = - it's used purely internally by the test egg when you say the likes of: (test 1.0 (+ 0.5 0.5)) It's probably best to define your own equality predicate, I think! ABS -- Alaric Snell-Pym http://www.snell-pym.org.uk/alaric/
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