Merge pull request akshitagit#166 from Subhransu02/big

cycle_sort in js added

Author: akshitagupta15june

Algorithms/cyclic_sort.js

@@ -0,0 +1,48 @@
+function cycleSort(array) {
+    // loop from the beginning of the array to the second to last item
+    for (let currentIndex = 0; currentIndex < array.length - 1; currentIndex++) {
+      // save the value of the item at the currentIndex
+      let item = array[currentIndex]
+  
+      let currentIndexCopy = currentIndex
+      // loop through all indexes that proceed the currentIndex
+      for (let i = currentIndex + 1; i < array.length; i++)
+        if (array[i] < item)
+          currentIndexCopy++
+  
+      // if currentIndexCopy has not changed, the item at the currentIndex is already in the correct currentIndexCopy
+      if (currentIndexCopy == currentIndex)
+        continue
+  
+      // skip duplicates
+      while (item == array[currentIndexCopy])
+        currentIndexCopy++
+  
+      // swap
+      let temp = array[currentIndexCopy]
+      array[currentIndexCopy] = item
+      item = temp
+  
+      // repeat above steps as long as we can find values to swap
+      while (currentIndexCopy != currentIndex) {
+        currentIndexCopy = currentIndex
+        // loop through all indexes that proceed the currentIndex
+        for (let i = currentIndex + 1; i < array.length; i++)
+          if (array[i] < item)
+            currentIndexCopy++
+  
+        // skip duplicates
+        while (item == array[currentIndexCopy])
+          currentIndexCopy++
+  
+        // swap
+        temp = array[currentIndexCopy]
+        array[currentIndexCopy] = item
+        item = temp
+      }
+    }
+  }
+  
+  let array = [12, 11, 15, 10, 9, 1, 2, 3, 13, 14, 4, 5, 6, 7, 8]
+  cycleSort(array)
+  alert(array)