For a moment this had me bamboozled all over again. :-) Then I remembered I'd seen something like it before...
Examples (in j602): loadp_j_ dltbs_z_ (from strings.ijs) fselect_z_ (from files.ijs) xedit_j_ (from jadefull.ijs) We all know (don't we?) that it's possible to embed tacit verbs in an explicit definition. These examples show that it's also possible to embed explicit verbs in a tacit definition. Cool. (...That's my explanation, anyway.) I'm toying with whether to include it in: http://www.jsoftware.com/jwiki/Vocabulary/dollarco ...maybe I should? After all, it seems to be "the way" to use $: in an explicit definition! On Tue, Sep 4, 2012 at 6:39 PM, Dan Bron <j...@bron.us> wrote: > It might be interesting and instructive to note that: > > max=: $:/ : (dyad define) > x >. y > ) > > > has the desired effect. > > -Dan > > > -----Original Message----- > From: programming-boun...@forums.jsoftware.com > [mailto:programming-boun...@forums.jsoftware.com] On Behalf Of Ian Clark > Sent: Tuesday, September 04, 2012 10:01 AM > To: programm...@jsoftware.com > Subject: Re: [Jprogramming] Self-reference in an explicit definition > > Thanks. All is now clear. > > The J Dictionary says: "$: denotes the longest verb that contains it." > http://www.jsoftware.com/help/dictionary/d212.htm > > The essential piece of information I was missing (overlooking?) was: > "...in the current sentence". > > On Tue, Sep 4, 2012 at 2:19 PM, Raul Miller <rauldmil...@gmail.com> wrote: >> $: refers to the largest containing verb in the current sentence. >> Explicit definitions contain sentences. >> >> -- >> Raul >> >> On Tuesday, September 4, 2012, Ian Clark <earthspo...@gmail.com> wrote: >>> Let's define a verb: max which can be used either dyadically: >>> >>> 5 max 7 >>> 7 >>> >>> or monadically: >>> >>> max 5 7 >>> 7 >>> >>> Can somebody explain to me please >>> (for the purpose of completing >>> http://www.jsoftware.com/jwiki/Vocabulary/dollarco ) why this works: >>> >>> max=: $:/ : >. >>> >>> but this doesn't: >>> >>> max=: 3 : 0 >>> $:/y >>> : >>> x>.y >>> ) >>> >>> The explicit version (which to me looks equivalent to the tacit one) >>> does not work with a noun longer than 1 atom: >>> >>> max 7 >>> 7 >>> max 5 7 >>> |stack error: max >>> | $:/y >>> --------------------------------------------------------------------- >>> - 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 > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
