ok guys i won't dig myself a deeper hole here - you win. (savored my 3 seconds of fame before steven corrected that typo tough!)
On 18 September 2014 18:21, Jameson Nash <vtjn...@gmail.com> wrote: > I'm not sure about most people, but given the first expression, I would > have handed the paper back and told the author to clarify the ambiguity. > > > On Thursday, September 18, 2014, Florian Oswald <florian.osw...@gmail.com> > wrote: > >> well, I guess most computer scientists would be surprised. writing on a >> piece of paper >> >> -10^2 >> >> and >> >> -(10^2) >> >> I think most people are going to say the first expression is 100 and the >> second is -100. I take the point that what I did was a bit stupid and Julia >> is not making any mistake here. >> >> On 18 September 2014 16:50, Gunnar Farnebäck <gun...@lysator.liu.se> >> wrote: >> >>> It's not like Julia is doing anything strange or uncommon here. Most >>> people would be really surprised if -10² meant positive 100. >>> >>> Den torsdagen den 18:e september 2014 kl. 15:01:44 UTC+2 skrev Jutho: >>> >>>> because it is not recognized/parsed as literal but as the application >>>> of a unary minus, which has lower precedence than ^ >>>> >>>> I guess it is not possible to give binary minus a lower precedence than >>>> ^ and unary minus of higher precedence, since these are just different >>>> methods of the same function/operator. >>>> >>>> Op donderdag 18 september 2014 14:54:26 UTC+2 schreef Florian Oswald: >>>>> >>>>> yes - not sure why -0.4 and (-0.4) are any different. >>>>> >>>>> On 18 September 2014 13:52, Patrick O'Leary <patrick...@gmail.com> >>>>> wrote: >>>>> >>>>>> Seems like the literal -0.4^2.5 should throw the same error, though? >>>>>> >>>>>> >>>>>> On Thursday, September 18, 2014 6:42:56 AM UTC-5, Tim Holy wrote: >>>>>>> >>>>>>> http://docs.julialang.org/en/latest/manual/faq/#why-does-jul >>>>>>> ia-give-a-domainerror-for-certain-seemingly-sensible-operations >>>>>>> >>>>>>> On Thursday, September 18, 2014 03:24:00 AM Florian Oswald wrote: >>>>>>> > # define a variable gamma: >>>>>>> > >>>>>>> > gamma = 1.4 >>>>>>> > mgamma = 1.0-gamma >>>>>>> > >>>>>>> > julia> mgamma >>>>>>> > -0.3999999999999999 >>>>>>> > >>>>>>> > # this works: >>>>>>> > >>>>>>> > julia> -0.399999999999^2.5 >>>>>>> > -0.10119288512475567 >>>>>>> > >>>>>>> > # this doesn't: >>>>>>> > >>>>>>> > julia> mgamma^2.5 >>>>>>> > ERROR: DomainError >>>>>>> > in ^ at math.jl:252 >>>>>>> >>>>>>> >>>>> >>
