FreeBirdLjj

print "Hello, switch"

-- If the default case does not have to be handled, we can use the following auxiliary function:
local function switch(value)
	-- Handing `cases` to the returned function allows the `switch()` function to be used with a syntax closer to c code (see the example below).
	-- This is because lua allows the parentheses around a table type argument to be omitted if it is the only argument.
	return function(cases)
		
		-- The default case is achieved through the metatable mechanism of lua tables (the `__index` operation).
		setmetatable(cases, cases)

jrus

local random = math.random
local function uuid()
    local template ='xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'
    return string.gsub(template, '[xy]', function (c)
        local v = (c == 'x') and random(0, 0xf) or random(8, 0xb)
        return string.format('%x', v)
    end)
end