' I'm thinking there's got to be some kind of
loopless prefix sort of solution but am at a loss to come up with it.'
Maybe it was a suffix, rather than a prefix, solution what you really had
in mind?
]`[@.('' -: ])&.>~/\.&.|.
On Mon, Jan 5, 2015 at 11:06 AM, Devon McCormick <[email protected]> wrote:
> I just threw together a short J solution that does what I want but it uses
> a loop and a conditional. I'm thinking there's got to be some kind of
> loopless prefix sort of solution but am at a loss to come up with it.
>
> My code looks like this:
>
> fillEmptyFwd=: 3 : 0
> for_ix. i.<:#y do.
> if. 0=#>y{~>:ix do. y=. (ix{y) (>:ix)}y end.
> end.
> y
> )
>
> An example usage would be this:
>
> fillEmptyFwd '';'Hi';'';'';'Ho';'';'hee';'';'';'haw';'';'';'Yo';''
> ++--+--+--+--+--+---+---+---+---+---+---+--+--+
> ||Hi|Hi|Hi|Ho|Ho|hee|hee|hee|haw|haw|haw|Yo|Yo|
> ++--+--+--+--+--+---+---+---+---+---+---+--+--+
>
> Any ideas on something less loopy/conditional?
>
> --
> Devon McCormick, CFA
> ----------------------------------------------------------------------
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>
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