Note: y =. x m} y is in-place and faster for that reason.
x=. q 3}&.|: x also does the amend in-place.
It does appear that m}"r goes through rank processing (I thought the
rank was handled in the verb).
hhr
On 12/26/2017 10:44 AM, R.E. Boss wrote:
x=: 10000 60 ?.@$ 0
q=: 10000 ?.@# 0
100 ts 'c=. q (<a:;30)} x'
0.0026698188 8915712
100 ts 'x=. q (<a:;30)} x'
0.00017353792 527104
100 ts 'x=. q 3}&.|: x'
0.0089778759 16780160
100 ts 'd=. q (3})"0 1 x'
0.0073609598 30150016
R.E. Boss
-----Original Message-----
From: Programming [mailto:programming-boun...@forums.jsoftware.com]
On Behalf Of David Mitchell
Sent: dinsdag 26 december 2017 12:15
To: programm...@jsoftware.com
Subject: Re: [Jprogramming] Clearing a screen in jqt and the best way to
replace a column
Some choices:
2000 ts 'e=. q 3}&.|: x'
2.56966e_5 3571
2000 ts 'd=. q (3})"0 1 x'
5.65454e_5 43648
2000 ts 'c=. q (<a:;3)} x'
1.36101e_5 27136
$q
192
$x
192 6
David Mitchell
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