Initial data commit

Task/Damm-algorithm/Sidef/damm-algorithm.sidef

@@ -0,0 +1,20 @@
+func damm(digits) {
+    static tbl = [
+          [0, 3, 1, 7, 5, 9, 8, 6, 4, 2],
+          [7, 0, 9, 2, 1, 5, 4, 8, 6, 3],
+          [4, 2, 0, 6, 8, 7, 1, 3, 5, 9],
+          [1, 7, 5, 0, 9, 8, 3, 4, 2, 6],
+          [6, 1, 2, 3, 0, 4, 5, 9, 7, 8],
+          [3, 6, 7, 4, 2, 0, 9, 5, 8, 1],
+          [5, 8, 6, 9, 7, 2, 0, 1, 3, 4],
+          [8, 9, 4, 5, 3, 6, 2, 0, 1, 7],
+          [9, 4, 3, 8, 6, 1, 7, 2, 0, 5],
+          [2, 5, 8, 1, 4, 3, 6, 7, 9, 0],
+    ]
+
+    !digits.flip.reduce({|row,col| tbl[row][col] }, 0)
+}
+
+for n in [5724, 5727, 112946] {
+    say "#{n}:\tChecksum digit #{ damm(n.digits) ? '' : 'in'}correct."
+}