Hi Thank you for the great reference card.
I think I found a typo: (3 4;2 2) u;._3 selects <approp part of 8x8 abc mtx> Shouldn't it be instead: (3 4,:2 2) u;._3 selects <approp part of 8x8 abc mtx> I made a 2-column pdf version of your raw file and attached it just for experimentation. On 3/29/06, Henry Rich <[EMAIL PROTECTED]> wrote: > I am working on a one-sheet reference card for J. It looks like it will fit > on front & back of an 8.5x11 sheet if I use an 8-point font. I have a first > pass at what I want to include, attached to this email as a text file. I > would like comments from interested users before I go through the pain of > cramming it onto a page. > > The intended user has a reading knowledge of J but may need some reminding > about what the primitives do. My goal is to include one example of all the > important idioms of J so that the interested user can look it up in more > detail > if he finds it promising. The advanced reader who is trying to become expert > in > J should feel that he has been exposed to most of the language once he has > finished > reading the reference card. Coders trying to remember a form should find > enough to > jog their memory. > > I am going to group the J facilities by function: partitions, math, > selection, etc. > > For each form, I have an example, my mnemonic, and a result. If the result > is an array it's not shown in the text file. The operands A and B are > a character array and a complex boxed structure which will be shown in the > legend. > > I don't really expect anyone to review the attached notes in detail, but > if y'all would think a minute about what features you have found yourself > forgetting, or some feature you didn't find out about for years but now love, > let me know if you don't find it listed. I say nothing about useful verbs > from the J scripts and I welcome suggestions about what to mention. > > Henry Rich > > > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > > >
---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
