Long time since I worked seriously with binary and especially packed binaries but I seem to recall that it is all in the definition. If it is defined as signed binary the first 0/1 tells you +/- Published without certainty
2011/12/30 Linda Alvord <lindaalv...@verizon.net> > How can you tell when the leading digit is a "negative bit" or a "binary > digit"? > > In the situation above the same number can represent two different binary > numbers. If 1 1 0 1 is sometimes 13 or might be _5 when is each > appropriate?v. Isn't that the source of some problems? > > The spaces indicate that the number is probably a single binary number, but > it could be a list of true and false indicators. You would need to know the > context to determine the difference. > > Linda > > -----Original Message----- > From: programming-boun...@jsoftware.com > [mailto:programming-boun...@jsoftware.com] On Behalf Of Kip Murray > Sent: Thursday, December 29, 2011 8:25 PM > To: Programming forum > Subject: Re: [Jprogramming] How #: should have been designed > > > tcrRaul }: i:4 > 1 0 0 > 1 0 1 > 1 1 0 > 1 1 1 > 0 0 0 > 0 0 1 > 0 1 0 > 0 1 1 > > tcrRandy }: i:4 > 1 1 0 0 > 1 1 0 1 > 1 1 1 0 > 1 1 1 1 > 0 0 0 0 > 0 0 0 1 > 0 0 1 0 > 0 0 1 1 > > tcrRaul > {.@#:@(,: (2 * >./@,)) > > tcrRandy > (0 > ]) ,"0 1 #: > > > On 12/29/2011 8:41 AM, Randy MacDonald wrote: > > On 12/8/2011 4:39 PM, Raul Miller wrote: > >> {.@#:@(,: 2 *>./@,)i:2 > > ((0>]),"0 1#:) i:2 NB. seems to work just as well, and more obviously > > handles the sign bit. > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > -- Björn Helgason, Verkfræðingur Fornustekkum II 781 Hornafirði, t-póst: gos...@gmail.com gsm: +3546985532 twitter: @flugfiskur http://groups.google.com/group/J-Programming Tæknikunnátta höndlar hið flókna, sköpunargáfa er meistari einfaldleikans góður kennari getur stigið á tær án þess að glansinn fari af skónum /|_ .-----------------------------------. ,' .\ / | Með léttri lund verður | ,--' _,' | Dagurinn í dag | / / | Enn betri en gærdagurinn | ( -. | `-----------------------------------' | ) | (\_ _/) (`-. '--.) (='.'=) ♖♘♗♕♔♙ `. )----' (")_(") ☃☠ ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
