[sc-users] Re: Problems with "real" numbers

[TomD <tomdiscus@xxxxxx>]

/x = 0.1 + 0.1 + 0.1

x == 0.3

-> false/

*The simplest is the best !*

/A general programming problem ! 
Equality checks with floats 
have to be done with a defined threshold, e.g.

(x - 0.3).abs < 1e-4    // 1e-4 = 1 * (10 ** -4) = 0.0001

-> true/

*(x - 0.3).abs is the same as x - 0.3... In which way do you mean to use
what you show here ?*

/or use the dedicated method equalWithPrecision,
here with default threshold arg precision = 1e-4

x.equalWithPrecision(0.3)

-> true/

*Ok interesting method thanks, I might replace my choice with this but it's
a little tricky because of the need to define a degree of precision...so
I've got to think about it, anyway very good to know (gives me the idea to
explore a little more the SimpleNumber class) !

Cheers

T*



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