Initial data commit

Task/Sorting-algorithms-Merge-sort/V-(Vlang)/sorting-algorithms-merge-sort.v

@@ -0,0 +1,41 @@
+fn main() {
+    mut a := [170, 45, 75, -90, -802, 24, 2, 66]
+    println("before: $a")
+    a = merge_sort(a)
+    println("after: $a")
+}
+
+fn merge_sort(m []int) []int {
+    if m.len <= 1{
+        return m
+    } else {
+        mid := m.len / 2
+        mut left := merge_sort(m[..mid])
+        mut right := merge_sort(m[mid..])
+        if m[mid-1] <= m[mid] {
+            left << right
+            return left
+        }
+        return merge(mut left, mut right)
+    }
+}
+
+fn merge(mut left []int,mut right []int) []int {
+    mut result := []int{}
+    for left.len > 0 && right.len > 0 {
+        if left[0] <= right[0]{
+            result << left[0]
+            left = left[1..]
+        } else {
+            result << right[0]
+            right = right[1..]
+        }
+    }
+    if left.len > 0  {
+        result << left
+    }
+    if right.len > 0 {
+        result << right
+    }
+    return result
+}