[Jprogramming] Clearing a screen in jqt and the best way to replace a column

[David Mitchell]

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

On 12/23/2017 17:10, devonmcc wrote:
> I use an expression like this to update a column:   (97 98 99) 2}&.|: i. 3 3
> 
> 
> 
> 
> Sent from my Verizon, Samsung Galaxy smartphone
> -------- Original message --------From: Henry Rich <henryhrich at gmail.com> Date: 12/23/17  15:53  (GMT-05:00) To: programming at jsoftware.com Subject: Re: [Jprogramming] Clearing a screen in jqt and the best way to replace a column
> Your solution is good.  There is special code for most of it. See
> warnings at
> 
> http://code.jsoftware.com/wiki/Vocabulary/SpecialCombinations#Whole-Array_Operations
> 
> Another possibility is
> 
>      (($,)~ _2 */\ $) 0 2 1 3 |: > array
> 
> Henry Rich
> 
> 
> 
> On 12/23/2017 2:29 PM, Jimmy Gauvin wrote:
>> I was exploring the kind of problem lately and ended up with:
>>
>>       (,.97 98 99) (,2)}"1 i. 3 3
>>
>> Left rank never occurred to me.
>>
>> While we're playing with structures, is there a better way to unbox boxes
>> of arrays than the following:
>>
>>       (2 2$2)<;._3 i.6 6
>> ┌─────┬─────┬─────┐
>> │0 1  │2 3  │ 4  5│
>> │6 7  │8 9  │10 11│
>> ├─────┼─────┼─────┤
>> │12 13│14 15│16 17│
>> │18 19│20 21│22 23│
>> ├─────┼─────┼─────┤
>> │24 25│26 27│28 29│
>> │30 31│32 33│34 35│
>> └─────┴─────┴─────┘
>>       > ,.&.>/ ,&.>/ (2 2$2)<;._3 i.6 6
>>     0  1  2  3  4  5
>>     6  7  8  9 10 11
>> 12 13 14 15 16 17
>> 18 19 20 21 22 23
>> 24 25 26 27 28 29
>> 30 31 32 33 34 35
>>
>> maybe a tesselation inverse?
>>
>>
>>
>> On Sat, Dec 23, 2017 at 12:52 PM, Henry Rich <henryhrich at gmail.com> wrote:
>>
>>> To modify acolumn:
>>>
>>> 97 98 99 (2})"0 1 i. 3 3
>>>
>>> 0 1 97
>>>
>>> 3 4 98
>>>
>>> 6 7 99
>>>
>>>
>>> Henry Ric
>>> ​h​
>>>
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