Hello,
I'm trying to find an elegant way of indexing a two-dimensional sequence
with the coordinates as keys.
The input is something like.
(
"#####"
"#...O"
"#.#.#"
"I.#.#"
"#...#"
"#####")
The midje test below indicates what kind of behaviour I'm looking for. I
can't come up with a solution that is elegant. I'm sure there are better
ways to do this, especially in such a sequence oriented language as clojure.
Would someone please give me a hand here?
(defn- index-maze [str-maze]
(let [width (count (first str-maze))
symbols (flatten (map seq str-maze))
total-size (count symbols)]
(apply conj
(for [position (range total-size)
:let [row (quot position width)
column (mod position width)
sym (nth symbols position)]]
{[row column] sym}))))
(fact
"makes a map with the coordinates as keys symbols as values"
(index-maze '("#I#"
"#O#")) => (in-any-order {
[0 0] \#
[0 1] \I
[0 2] \#
[1 0] \#
[1 1] \O
[1 2] \#}))
Regards
Johan Martinsson
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