Re: suggestion for 2.3
On Mon, 07 May 2001, aku at inbox.as wrote:
> if I have a sequence:
>
> seq =
> {
> { 1, 2, 3},
> { 4, 5, 6},
> { 7, 8, 9},
> {10,11,12}
> }
>
> and i want to get the first column ( 1,4,7,10 )
> in version 2.2 i must use at least 1 'for' statement.
>
> I suggest this for version 2.3:
>
> a = seq[][1] -- a = {1,4,7,10}
> a = seq[][1..2] -- a = {{1,2},{4,5},{7,8},{10,11}}
> a = seq[][1..2][1] -- a = {1,2}
> a = seq[] -- a = seq
>
This would indeed be useful in many ways - and it has been discussed here
before. So much so that it's been given a name "vertical slicing".
We can only hope that it's in Rob's list.
Regards,
Irv
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