This seems to work:
( p: @: i. @: (p:^:_1)) 30
A thing to remember:
f g h x
is not the same as
(f g h) x
but _is_ the same as
(f @: g @: h) x
------------------------------------------------------------------------
|\/| Randy A MacDonald | APL: If you can say it, it's done.. (ram)
|/\| [EMAIL PROTECTED] |
|\ | |If you cannot describe what you are doing
BSc(Math) UNBF'83 |as a process, you don't know what you're doing.
Sapere Aude | - W. E. Deming
Natural Born APL'er | Demo website: http://156.34.93.148/
-----------------------------------------------------(INTP)----{ gnat }-
----- Original Message -----
From: "Yuvaraj Athur Raghuvir" <[EMAIL PROTECTED]>
To: "Programming forum" <[email protected]>
Sent: Wednesday, September 20, 2006 8:51 PM
Subject: [Jprogramming] Explicit to Tacit - newbie question
Hello,
J is fascinating. Am learning slowly....
In the following why does pl not work?
n =. 30
p:^:_1 n
10
p: i. p:^:_1 n NB. list of primes less than n
2 3 5 7 11 13 17 19 23 29
pl =. p: i. p: ^: _1
pl n NB. Does not work!
1
p: i. (p: ^: _1) 30
2 3 5 7 11 13 17 19 23 29
pl =. p: i. (p:^:_1) NB. Is it a paranthesis problem?
5!:5 < 'pl' NB. J removes the paranthesis anyways...
p: i. p:^:_1
Regards,
Yuva
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
