> This really just reinforces what others have already said above that
> Clojure's standard library doesn't make it easy for you to do something
> inefficient
>
Do you at least agree it is at least debatable whether an intro class might
benefit from avoiding efficiency concerns initially?
I incorrectly assumed that that would require macros, but, it really only
requires beginner friendly regular functions.
For example, see this...
(defn comb [& args]
(let [comb_ (apply concat args)
first_ (first args)]
(cond (list? first_) comb_
(vector? first_) (into [] comb_)
(map? first_) (into {} comb_)
(set? first_) (into #{} comb_)
(string? first_) (apply str comb_))))
Testing with these...
(prn (comb [1 2] [3 4]))
(prn (comb [1] [2 3]))
(prn (comb [1 2] [3]))
(prn (comb '(1 2) '(3 4)))
(prn (comb '(1) '(2 3)))
(prn (comb '(1 2) '(3)))
(prn (comb #{1 2} #{3 4}))
(prn (comb #{1} #{2 3}))
(prn (comb #{1 2} #{3}))
(prn (comb [1 2] [3 4] '(5 6)))
(prn (comb '(1 2) '(3 4) [5 6]))
(prn (comb {"a" "b", "c" "d"} {"e" "f", "g" "h"}))
Gives these...
[1 2 3 4]
[1 2 3]
[1 2 3]
(1 2 3 4)
(1 2 3)
(1 2 3)
#{1 4 3 2}
#{1 3 2}
#{1 3 2}
[1 2 3 4 5 6]
(1 2 3 4 5 6)
{"a" "b", "c" "d", "e" "f", "g" "h"}
{"a" "b", "c" "d", "e" "f"}
{"a" "b", "c" "d", "e" "f"}
"abcdefghi"
Notice that with my comb (combine) function, I eliminated the need for str,
prepend, append, conj, etc. Furthermore, comb gives
the intuitive answer irrespective of efficiency.
Is that so bad at least temporarily?
cs
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