Initial upload

go/chessboard/chessboard.go

@@ -0,0 +1,55 @@
+package chessboard
+
+// Declare a type named Rank which stores if a square is occupied by a piece - this will be a slice of bools
+// Declare a type named Chessboard contains a map of eight Ranks, accessed with values from "A" to "H"
+type Rank []bool
+type Chessboard map[string]Rank
+// CountInRank returns how many squares are occupied in the chessboard,
+// within the given rank
+func CountInRank(cb Chessboard, rank string) int {
+    sum := 0
+    file, ok := cb[rank]
+    if !ok {
+        return 0 
+    }
+    for _, f := range file {
+        if f {
+            sum += 1
+        }
+    }
+    return sum
+}
+
+// CountInFile returns how many squares are occupied in the chessboard,
+// within the given file
+func CountInFile(cb Chessboard, file int) int {
+    if file < 1 || file > 8 {
+        return 0
+    }
+    sum := 0
+    for _, rank := range cb {
+        if rank[file-1] {
+            sum += 1
+        }
+    }
+    return sum
+}
+
+// CountAll should count how many squares are present in the chessboard
+func CountAll(cb Chessboard) int {
+    sum := 0
+    for _, rank := range cb {
+        sum += len(rank)
+    }
+
+    return sum
+}
+
+// CountOccupied returns how many squares are occupied in the chessboard
+func CountOccupied(cb Chessboard) int {
+    sum := 0
+    for name := range cb {
+        sum += CountInRank(cb, name)
+    }
+    return sum
+}