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Diffstat (limited to 'lib/game/space-is-neighbor.fnl')
-rw-r--r-- | lib/game/space-is-neighbor.fnl | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/game/space-is-neighbor.fnl b/lib/game/space-is-neighbor.fnl new file mode 100644 index 0000000..373feaf --- /dev/null +++ b/lib/game/space-is-neighbor.fnl @@ -0,0 +1,19 @@ +(local {: contains + : head + : tail + } (require :lib.table)) + +(lambda space-is-neighbor? [all-neighbors from to] + ;; i have learned to check that i'm passing the correct type of move + ;; i.e. a number and not a string + (assert (= "number" (type from)) "from must be a number") + (assert (= "number" (type to)) "to must be a number") + (assert (= "table" (type all-neighbors)) "all-neighbors must be a table") + + (let [neighborhood-list (icollect [_ n (ipairs all-neighbors)] (if (= from (head n)) n)) + neighborhood (head neighborhood-list) + neighbors (tail neighborhood) + is-neighbor (contains neighbors to)] + is-neighbor)) + +{: space-is-neighbor?} |