open an issue and propose a path to get there Stef
On May 2, 2011, at 3:34 PM, Camillo Bruni wrote: > DigitAt: is a horrible name then, should rather be bitAt:. > > the digitAt: implementation you're looking for: > > ^ self // (10 raisedTo: index - 1) \\ 10 > > thats quite short :) > > On 2011-05-02, at 11:35, Bernat Romagosa wrote: > >> Ouch, understood! >> >> Then what would be the proper way to address a decimal digit in a number? I >> can only think of (bigNumber asString at: index) asNumber, which is... awful. >> >> 2011/5/2 Sven Van Caekenberghe <[email protected]> >> Bernat, >> >> On 02 May 2011, at 11:13, Bernat Romagosa wrote: >> >> > Hi, try to run the following: >> > >> > (2 raisedTo: 100000) digitAt: 1 >> > >> > The expected result (if I understood what digitAt: should return) is 9, >> > but the message returns 0 instead. In fact, it returns 0 for any index. >> > >> > Is this a bug or am I missunderstanding how digitAt: should work? >> > >> > Cheers, >> > >> > Bernat Romagosa. >> > >> > p.s. My config is Pharo 1.2 with a 'Croquet Closure Cog VM [CoInterpreter >> > VMMaker-oscog.51]' on Debian Lenny. >> >> Consider, >> >> 2 raisedTo: 32 >> >> #digitAt: for digits 1 to 4 returns 0, 5 return 1. >> From the comments you can see that the number is looked at in base 256. >> The above number thus has 5 digits in this base, four are zero and the >> highest one is one. >> Furthermore, the first digit is the lowest one. >> If you inspect the number it might become clearer. >> >> Any #digitAt: has to depend on the base you use to represent the number, >> this one doesn't, so it seems to be useful only to return internal parts of >> a number. >> >> HTH, >> >> Sven >> >> >> >
