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Task/Sorting-algorithms-Merge-sort/JavaScript/sorting-algorithms-merge-sort.js

@@ -0,0 +1,22 @@
+function merge(left,right,arr){
+	var a=0;
+	while(left.length&&right.length)
+		arr[a++]=right[0]<left[0]?right.shift():left.shift();
+	while(left.length)arr[a++]=left.shift();
+	while(right.length)arr[a++]=right.shift();
+}
+function mSort(arr,tmp,l){
+	if(l==1)return;
+	var 	m=Math.floor(l/2),
+		tmp_l=tmp.slice(0,m),
+		tmp_r=tmp.slice(m);
+	mSort(tmp_l,arr.slice(0,m),m);
+	mSort(tmp_r,arr.slice(m),l-m);
+	merge(tmp_l,tmp_r,arr);
+}
+function merge_sort(arr){
+	mSort(arr,arr.slice(),arr.length);
+}
+
+var arr=[1,5,2,7,3,9,4,6,8];
+merge_sort(arr); // arr will now: 1,2,3,4,5,6,7,8,9