> If someone asked me to encapsulate "whether values are integers or not", I > would use > > (= <.) 3 3.14 5
See 1st entry in: file:///Applications/j602/help/phrases/hooks.htm IanClark On Fri, Nov 30, 2012 at 11:36 PM, Peter B. Kessler <peter.b.kess...@oracle.com> wrote: > And having read that statement about parentheses, you then come to the > bottom of http://www.jsoftware.com/help/jforc/common_mistakes.htm where it > says > > As a stopgap, you can imagine that each name's value is enclosed in > parentheses > before it is substituted. This still isn't exactly right but it gets you > the > right result in all situations you are likely to encounter. > > which, when things don't work the way I think they should, makes me wonder > if I've found one of the "unlikely" situations. > > That said, I'm slowly getting better at reading J (or more consistent about > using things like (5!:2) > > ... peter > > P.S. If you are reviving http://www.jsoftware.com/jwiki/ControlNuVoc, then > someone should fix http://www.jsoftware.com/jwiki/Vocabulary/ltdot, which > under "Common uses" says > > Floor (and Ceiling (<.)) can also be useful for testing > whether values are integers or not. > > and > > Floor (and Ceiling (<.)) can be useful for forcing > floating point representations of integers to be > integers in order to save memory (8 vs 4 bytes per value). > > where the glyph for Ceiling should be >. in both sentences. (That just > happened to be the first page I looked at, and I think I only noticed the > problem because I was staring at the glyph for Floor.) Those look like > copy-n-pasto's from the Ceiling page. > > If someone asked me to encapsulate "whether values are integers or not", I > would use > > (= <.) 3 3.14 5 > 1 0 1 > > but maybe you don't want to get into hooks this soon. (Or the equivalent > fork (] = <.) .) > > > David Ward Lambert wrote: >> >> The DoJ is perhaps the best technical writing I've seen, >> even having admitted that it was 2 years before I understood how to >> decipher headings conjunction and adverb headings such as >> Atop u@v mv lv rv >> Let's continue the NuVoc project. >> http://www.jsoftware.com/jwiki/ControlNuVoc >> Maybe we'll decide to emphasize what as I recall was but a mere sentence >> in the DoJ "when proverbs are substituted into a sentence it is as if >> they were parenthesized." WITH POTENTIALLY DRAMATIC CONSEQUENCE!!!! >> >>> Date: Fri, 30 Nov 2012 15:06:29 +0000 >>> From: Ian Clark <earthspo...@gmail.com> >>> To: programm...@jsoftware.com >>> Subject: Re: [Jprogramming] @: and capped fork >>> Message-ID: >>> <CAB2g=gAt2XZ0RNM++-YKoLNg3fewCoruhJMjCPJfMu6ur >>> +0...@mail.gmail.com> >>> Content-Type: text/plain; charset=UTF-8 >>> >>> I too have felt the need for Really Prominent Pages (RPPs?) and I've >>> regretfully come to conclude that the only workable solution for the >>> beginner is the forum, as Dan hints. Hence certain issues will turn up >>> over and over again in the threads. >> >> >> >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
