Alternatively, if powers are not too big and all non-negative you can construct
a train and execute it. Something like
u0=.>:
u1=:+:
u2=:*:
g=.({: ,~ ({. [:`[:) ,@,. }:) 3 4 5#u0`u1`u2
g `:6
[: u0 [: u0 [: u0 [: u1 [: u1 [: u1 [: u1 [: u2 [: u2 [: u2 [: u2 u2
(g `: 6) 1
19
----- Original Message -----
From: "R.E. Boss"
Date: Thursday, January 24, 2008 13:13
Subject: [Jprogramming] Powers of verbs
To: 'Programming forum'
> Given a sequence of verbs, say u0, u1, u2, ... and a
> row of integers, say
> i0, i1, i2, ....
> How does one achieve
>
> ... u2^:i2 u1^:i1 u0^:i0 y ?
>
> Example:
> let (1&+)`(+%:@|) be u1 and u0
> and 2 3 be i1 and i0
>
> (1&+)^:2 (+%:@|)^:3 [5
> 15.076627
>
> is the desired result.
_________________________________________________________________
Connect and share in new ways with Windows Live.
http://www.windowslive.com/share.html?ocid=TXT_TAGHM_Wave2_sharelife_012008----------------------------------------------------------------------
For information about J forums see http://www.jsoftware.com/forums.htm
