Re: More efficient alternatives to (subseq) for accessing parts of a string array?

dpapathanasiou <denis.papathanasiou@gmail.com> wrote:
+---------------
| I'm using (read-sequence) within a (with-open-file) block to read a
| plain text file into a one-dimensional array.
...
| Once in memory, I'd like to be able to pick out lists of the same
| attribute that appears in each line of the file.
+---------------

In addition to other advice you've been given, I've found
the CL functions SEARCH, MISMATCH, POSITION, and POSITION-IF
to be *very* useful for doing non-consing string parsing.

Then, having found the bounding indices for the tokens
you're looking for, you can use either/both READ-FROM-STRING
or/and PARSE-INTEGER with the :START & :END keyword args
to further avoid using SUBSEQ.


-Rob

p.s. Don't forget ":JUNK-ALLOWED T" in PARSE-INTEGER calls,
when appropriate.

-----
Rob Warnock			<rpw3@rpw3.org>
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