I just want to read this into the record.
The task: to run substrings of a string y together in a single list,
where the substrings are given by an nx2 table x of (start,length) pairs.
The best solution is:
x (,."1@[ ;@:(<;.0) ]) y
(as of the next 9.01 beta).
The ,."1@[ creates a virtual block; the ;@:(<;.0) creates a virtual
block for each substring AND calculates the length of the final result
as it goes along. The characters are moved only once.
This is not special code; it's code that takes advantage of the features
that are generally available.
Henry Rich
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