Thanks Elijah, That's amazing, such a clear explanation! Links and N V V update much appreciated.
Thanks again Jon On Tue, 19 Oct 2021 at 08:14, Elijah Stone <[email protected]> wrote: > A single digit followed by a colon is a _constant verb_, which always > produces the same result no matter its operand. For example: > > f=. 2: > f 5 > 2 > f 7 7 > 2 > 3 f 'a' > 2 > > So, '2: * i.' is a V V V fork, whereas '2 * i.' is an N V V fork. I guess > that the latter were not yet implemented when that entry of the phrasebook > was written. > > FWIW the functions are documented in NuVoc; the entry link is titled '_9: > to 9:; Constant Functions', and can be read at > https://code.jsoftware.com/wiki/Vocabulary/zeroco > > There is also a dictionary entry: > https://www.jsoftware.com/help/dictionary/dconsf.htm > > -E > > > On Tue, 19 Oct 2021, Jon Quant wrote: > > > Hi all, > > > > The J phrases book has simple uses of colon which I can't find in the > NuVoc > > grammar. > > Could someone help explain the grammar of the following? > > > > Verb trains: > > > > even=: 2: * i. > > odd=: 1: + 2: * i. > > > > These seem to work without the colons anyway. What is the grammar rule > and > > purpose for an integer followed by a colon? > > > > Great fun so far with J! > > > > Thanks > > > > Jon > > ---------------------------------------------------------------------- > > 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
