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Task/Sorting-algorithms-Pancake-sort/JavaScript/sorting-algorithms-pancake-sort.js

@@ -0,0 +1,33 @@
+Array.prototype.pancake_sort = function () {
+    for (var i = this.length - 1; i >= 1; i--) {
+        // find the index of the largest element not yet sorted
+        var max_idx = 0;
+        var max = this[0];
+        for (var j = 1; j <= i; j++) {
+            if (this[j] > max) {
+                max = this[j];
+                max_idx = j;
+            }
+        }
+
+        if (max_idx == i)
+            continue; // element already in place
+
+        var new_slice;
+
+        // flip this max element to index 0
+        if (max_idx > 0) {
+            new_slice = this.slice(0, max_idx+1).reverse();
+            for (var j = 0; j <= max_idx; j++)
+                this[j] = new_slice[j];
+        }
+
+        // then flip the max element to its place
+        new_slice = this.slice(0, i+1).reverse();
+        for (var j = 0; j <= i; j++)
+            this[j] = new_slice[j];
+    }
+    return this;
+}
+ary = [7,6,5,9,8,4,3,1,2,0]
+sorted = ary.concat().pancake_sort();