chore: import upstream snapshot with attribution

examples/lua/fizzbuzz.lua

@@ -0,0 +1,20 @@
+#!/usr/bin/env luajit
+cfizz,cbuzz=0,0
+for i=1,20 do
+	cfizz=cfizz+1
+	cbuzz=cbuzz+1
+	io.write(i .. ": ")
+	if cfizz~=3 and cbuzz~=5 then
+		io.write(i)
+	else
+		if cfizz==3 then
+			io.write("Fizz")
+			cfizz=0
+		end
+		if cbuzz==5 then
+			io.write("Buzz")
+			cbuzz=0
+		end
+	end
+	io.write("\n")
+end

examples/lua/sorting.lua

@@ -0,0 +1,13 @@
+#!/usr/bin/env luajit
+fruits = {"banana","orange","apple","grapes"}
+
+for k,v in ipairs(fruits) do
+   print(k,v)
+end
+
+table.sort(fruits)
+print("sorted table")
+
+for k,v in ipairs(fruits) do
+   print(k,v)
+end

examples/lua/symmetric_difference.lua

@@ -0,0 +1,20 @@
+#!/usr/bin/env luajit
+A = { ["John"] = true, ["Bob"] = true, ["Mary"] = true, ["Elena"] = true }
+B = { ["Jim"] = true, ["Mary"] = true, ["John"] = true, ["Bob"] = true }
+
+A_B = {}
+for a in pairs(A) do
+    if not B[a] then A_B[a] = true end
+end
+
+B_A = {}
+for b in pairs(B) do
+    if not A[b] then B_A[b] = true end
+end
+
+for a_b in pairs(A_B) do
+    print( a_b )
+end
+for b_a in pairs(B_A) do
+    print( b_a )
+end