Create cycleSort.js

src/algorithms/sorting/cycle-sort/cycleSort.js

@@ -0,0 +1,78 @@
+<script>
+// A javascript program to implement cycle sort algorith
+ 
+    // Function sort the array using Cycle sort algorithm
+    function cycleSort(arr, n)
+    {
+     
+        // count the number of memory writes
+        let writes = 0;
+   
+        // traverse the array elements and put it to on
+        // the right position
+        for (let cycle_start = 0; cycle_start <= n - 2; cycle_start++)
+        {
+         
+            // initialize an item as starting point
+            let item = arr[cycle_start];
+   
+            // Find a position where we put the item. So basically we
+            // count all the smaller elements on the right side of the item.
+            let pos = cycle_start;
+            for (let i = cycle_start + 1; i < n; i++)
+                if (arr[i] < item)
+                    pos++;
+   
+            // If the item is already in correct position then
+            if (pos == cycle_start)
+                continue;
+   
+            // ignore all the duplicate elements
+            while (item == arr[pos])
+                pos += 1;
+   
+            // keeo the item to it's right position
+            if (pos != cycle_start)
+            {
+                let temp = item;
+                item = arr[pos];
+                arr[pos] = temp;
+                writes++;
+            }
+   
+            // Rotate the rest of the cycle
+            while (pos != cycle_start)
+            {
+                pos = cycle_start;
+   
+                // Find a position where we could put the element
+                for (let i = cycle_start + 1; i < n; i++)
+                    if (arr[i] < item)
+                        pos += 1;
+   
+                // ignore all the duplicate elements
+                while (item == arr[pos])
+                    pos += 1;
+   
+                // keep the item to it's right position
+                if (item != arr[pos]) {
+                    let temp = item;
+                    item = arr[pos];
+                    arr[pos] = temp;
+                    writes++;
+                }
+            }
+        }
+    }
+      
+// Driver code starts here
+ 
+    let arr = [ 1, 8, 3, 9, 10, 10, 2, 4 ];
+       let n = arr.length;
+       cycleSort(arr, n);
+  
+      document.write("After sort : " + "<br/>");
+       for (let i = 0; i < n; i++)
+           document.write(arr[i] + " ");
+   
+</script>