20 lines
695 B
Fennel
20 lines
695 B
Fennel
(local {: contains
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: head
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: tail
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} (require :lib.table))
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(lambda space-is-neighbor? [all-neighbors from to]
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;; i have learned to check that i'm passing the correct type of move
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;; i.e. a number and not a string
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(assert (= "number" (type from)) "from must be a number")
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(assert (= "number" (type to)) "to must be a number")
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(assert (= "table" (type all-neighbors)) "all-neighbors must be a table")
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(let [neighborhood-list (icollect [_ n (ipairs all-neighbors)] (if (= from (head n)) n))
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neighborhood (head neighborhood-list)
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neighbors (tail neighborhood)
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is-neighbor (contains neighbors to)]
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is-neighbor))
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{: space-is-neighbor?}
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