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Task/Sorting-algorithms-Shell-sort/Lua/sorting-algorithms-shell-sort.lua

@@ -0,0 +1,24 @@
+function shellsort( a )
+    local inc = math.ceil( #a / 2 )
+    while inc > 0 do
+        for i = inc, #a do
+            local tmp = a[i]
+            local j = i
+            while j > inc and a[j-inc] > tmp do
+                a[j] = a[j-inc]
+                j = j - inc
+            end
+            a[j] = tmp
+        end
+        inc = math.floor( 0.5 + inc / 2.2 )
+    end
+
+    return a
+end
+
+a = { -12, 3, 0, 4, 7, 4, 8, -5, 9 }
+a = shellsort( a )
+
+for _, i in pairs(a) do
+    print(i)
+end