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Task/Sorting-algorithms-Merge-sort/Dart/sorting-algorithms-merge-sort.dart

@@ -0,0 +1,54 @@
+merge(left, right, items) {
+  var a = 0;
+  var t;
+
+  while (left.length != 0 && right.length != 0) {
+    if (right[0] < left[0]) {
+     t = right[0];
+     right.removeRange(0,1);
+    } else {
+      t = left[0];
+      left.removeRange(0,1);
+    }
+    items[a++] = t;
+  }
+
+  while(left.length != 0) {
+    t = left[0];
+    left.removeRange(0,1);
+    items[a++] = t;
+  }
+
+  while(right.length != 0) {
+    t = right[0];
+    right.removeRange(0,1);
+    items[a++] = t;
+  }
+}
+
+mSort(items, tmp, l) {
+  if (l == 1) {
+    return;
+  }
+
+  var m = (l/2).floor().toInt();
+  var tmp_l = tmp.getRange(0, m);
+  var tmp_r = tmp.getRange(m, tmp.length-m);
+
+  mSort(tmp_l, items.getRange(0,m), m);
+  mSort(tmp_r, items.getRange(m, items.length-m), l-m);
+  merge(tmp_l, tmp_r, items);
+}
+
+merge_sort(items) {
+  mSort(items,items.getRange(0, items.length),items.length);
+}
+
+void main() {
+  var arr=[1,5,2,7,3,9,4,6,8];
+  print("Before sort");
+  arr.forEach((var i)=>print("$i"));
+  merge_sort(arr);
+  print("After sort");
+  arr.forEach((var i)=>print("$i"));
+}