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Task/Sorting-algorithms-Quicksort/Dart/sorting-algorithms-quicksort.dart

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+quickSort(List a) {
+  if (a.length <= 1) {
+    return a;
+  }
+
+  var pivot = a[0];
+  var less = [];
+  var more = [];
+  var pivotList = [];
+
+  // Partition
+  a.forEach((var i){
+    if (i.compareTo(pivot) < 0) {
+      less.add(i);
+    } else if (i.compareTo(pivot) > 0) {
+      more.add(i);
+    } else {
+      pivotList.add(i);
+    }
+  });
+
+  // Recursively sort sublists
+  less = quickSort(less);
+  more = quickSort(more);
+
+  // Concatenate results
+  less.addAll(pivotList);
+  less.addAll(more);
+  return less;
+}
+
+void main() {
+  var arr=[1,5,2,7,3,9,4,6,8];
+  print("Before sort");
+  arr.forEach((var i)=>print("$i"));
+  arr = quickSort(arr);
+  print("After sort");
+  arr.forEach((var i)=>print("$i"));
+}