ple=: i.&.(p:^:_1)@>: ple 30 2 3 5 7 11 13 17 19 23 29 ple 31 2 3 5 7 11 13 17 19 23 29 31 ple 32 2 3 5 7 11 13 17 19 23 29 31
Or, alternatively, ple=: pl@>: where pl is what you have already defined. ----- Original Message ----- From: Yuvaraj Athur Raghuvir <[EMAIL PROTECTED]> Date: Wednesday, September 20, 2006 8:30 pm Subject: Re: [Jprogramming] Explicit to Tacit - newbie question > Thanks! > > Interesting use of the dual/under operator &. Although I had > studied the > form, this usage didnot occur to me! > > As an extension question: > > p1 =: i. &. (p:^:_1) NB. primes strictly less than number > > so, > p1 37 > 2 3 5 7 11 13 17 19 23 29 31 > > In the generated list, I want the number included if it is prime. > What would > that extension be using &. ? > Or, does that need compelete verb definition? ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
