[slime-devel] slime.el (slime-repl-merge-histories)

[Madhu]

[Reported to the author 060520]

Currently the function slime-repl-merge-histories appears to be buggy
in not deleting duplicates, and maintaining order. For example:

ELISP> (slime-repl-merge-histories '(1 2 3 4 5) '(2 3 4 8))
(8 1 5 2 3 4)

ELISP> (slime-repl-merge-histories '(1 2 3 4 5 1 2 3 4 5) '(2 3 4 8))
(8 1 5 1 5 2 3 4)

I believe the desired result is: (2 3 4 8 1 5) so M-p in a fresh repl
will pick the last (latest) item from the previous repl session. I
believe the following Changelog entry applies,

|2005-10-11  Stefan Kamphausen <skampi at gmx.net>

and would suggest a simpler function that uses delete-duplicates (for
strings):

(defun slime-repl-merge-histories (old-hist new-hist)
  "Merge entries from OLD-HIST and NEW-HIST."
  (remove-duplicates (append new-hist old-hist) :test 'string= :from-end t))

--
Madhu


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