OK. Thanks for both ! Now I understand it better.
On Sunday, August 16, 2015 at 9:49:17 PM UTC+2, Stefan Karpinski wrote: > > Sorry, yes, I misread the example. They're both fine with just 0. > > On Aug 16, 2015, at 2:32 PM, Stefan Karpinski <[email protected] > <javascript:>> wrote: > > One is being returned, the other isn't. You cannot change line 8 without > causing the returned type to depend on the value. > > On Aug 16, 2015, at 10:10 AM, Sisyphuss <[email protected] <javascript:>> > wrote: > > In the Rational.jl > <https://github.com/JuliaLang/julia/blob/master/base/rational.jl> : > > In Line 8: `num == den == zero(T)` uses `zero(T)` to represent 0 > In Line 9: `g = den < 0` uses `0` to represent 0 > > Why this difference? My intuition tells me that in Line 8, it can be > replaced by 0 without performance issue. > > >
