Lua Switch Case Experiment

local function testFunc(tag)
    print(tag)
end

local function testFunc2(tag)
    for k=0,3 do
        print(k.." : "..tag)
    end
end

local function testFunc3(x,y,z)
    for k=0,3 do
        print("X:"..x.." Y:"..y.." Z:"..z)
    end
    return 7777
end

switch1 = {
    [1] = function(tag,x,y,z) testFunc(tag) end,
    [2] = function(tag,x,y,z) testFunc2(tag) end,
    [3] = function(tag,x,y,z) return testFunc3(x,y,z) end,
    ['default'] = function() print("defaulted") end,
}

local func = switch1[4]
if(func) then
  func("myName",-2,10,5.0)
else
  print " The program has been terminated."
  print " Thank you!";
end

function switch(param,tag,x,y,z,case_table)
    local case = case_table[param]
    if case then return case(tag,x,y,z) end
    local def = case_table['default']
    return def and def() or nil
end

local s = switch(1,"pr0ngus",7,5,5,switch1)
print(s)

s = switch(2,"pr0ngus",7,5,5,switch1)
print(s)

s = switch(3,"pr0ngus",7,5,5,switch1)
print(s)

s = switch(4,"pr0ngus",7,5,5,switch1)
print(s)