Like the others, I am wondering why you are recommending something like

   ".1j1#"1 A
1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3
1 1 1 2 2 2 3 3 3 1 1 1 2 2 2 3 3 3 1 1 1 2 2 2 3 3 3
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3

over

   "."0 A
1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3
1 1 1 2 2 2 3 3 3 1 1 1 2 2 2 3 3 3 1 1 1 2 2 2 3 3 3
1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3

Thoughts appreciated.

Thanks,

-- 
Raul


On Sun, Oct 15, 2017 at 3:31 PM, Linda Alvord <[email protected]> wrote:
> here's some thing to think about.
>
>
>
> Here's an "all combinations"challenge.
>
>
>     ]A=:|:((3^3),3)$, >{3$<'123'
>
> 111111111222222222333333333
>
> 111222333111222333111222333
>
> 123123123123123123123123123
>
> $A
>
> 3 27
>
>
>
> Find a way to separate all rows and columns with spaces so you can apply “. 
> To turn the characters to a 3 27 array of jntegers.
>
> .
>
> Linda
>
>
>   AOL Mobile Mail
>
>
> -----Original Message-----
>
> From: Cliff Reiter <[email protected]>
> To: programming <[email protected]>
> Sent: Tue, Oct 3, 2017 11:21 PM
> Subject: Re: [Jprogramming] Quora Digits Problem
>
>
> A cheat (?) that builds instead of "removing" z=.,".>{4#<'123456' $z 1296 
> 10{.z 1111 1112 1113 1114 1115 1116 1121 1122 1123 1124 On 10/3/2017 4:16 PM, 
> Skip Cave wrote: > Another interesting Quora problem: > > Given the integers 
> from 1000 to 9999, remove all integers that contain a 7, > 8, 9, or zero, and 
> list the remaining integers. > > Skip > 
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