First draft looks like this.
(((>.|."1)@(*=)@:>:@i.@#){ ' ',])'abcde'
a a
b b
c
d d
e e
(((>.|."1)@(*=)@:>:@i.@#){ ' ',])'ab'
aa
bb
One of the things that I like about J is the way it lets you build and test
your ideas as you go. I look forward to more elegant solutions.
Cheers, bob
On 2012-12-09, at 6:42 PM, km wrote:
> Write verb cross.
>
> cross 'abcde'
> a a
> b b
> c
> d d
> e e
>
> (Result should look like a cross with 'abcde' along both diagonals.)
>
> cross 'a'
> a
> cross 'ab'
> aa
> bb
>
> Kip Murray
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