Could someone help me write a J-5 version of the following getpath
procedure (which returns the directory of a source file)? The only
trick I know in migrating from J6 to J5 is to watch out for y. and
friends, and they aren't here.
> getpath =: 3 : 0
> dirname=. #~ '/\' +./\...@e.~ ]
> dirname (4!:4<'dirname') {:: 4!:3''
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