I was stunned by Cliff's cool use of catalog (catalogue?) I had not really
grasped the capabilities of the monadic use of '{' on boxed arguments. I
had always used { dyadically as 'from'
2 { 1 2 3
3
This was a revelation:
{2#<'123'
┌──┬──┬──┐
│11│12│13│
├──┼──┼──┤
│21│22│23│
├──┼──┼──┤
│31│32│33│
└──┴──┴──┘
Skip
Skip Cave
Cave Consulting LLC
On Tue, Oct 3, 2017 at 10:21 PM, Cliff Reiter <[email protected]> wrote:
> 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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>>
>
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