First commit

exercises/ch02/reverse.lua

@@ -0,0 +1,12 @@
+local function reverse(a, s, e)
+    for i = s, e / 2 do
+        local counter_i = e - (i - 1)
+        local tmp = a[i]
+        a[i] = a[counter_i]
+        a[counter_i] = tmp
+    end
+end
+
+local a = {5, 3, 8, 1}
+reverse(a, 1, #a)
+print(table.unpack(a))