====== advtrains.random_id ======
//Generates an unique identifier.//

//Note: this page has been written for Advtrains 2.0.1 TSS and Minetest 5.1.0. Examples and practices described in this page don't take advantage of improvements introduced in later releases.//

===== Syntax =====
<code lua>
advtrains.random_id()
</code>

===== Extended description =====
Generates a random 6-digit identifier.

===== Parameters =====
*This function does not take any parameters.*

===== Example =====
<code lua>
-- Create a brick platform
advtrains.random_id() -- 160218
advtrains.random_id() -- 372546
</code>

===== In source code =====
advtrains/helpers.lua, lines 330 to 336:

<file lua random_id.lua>
function advtrains.random_id()
    local idst=""
        for i=0,5 do
	    idst=idst..(math.random(0,9))
    end
    return idst
end
</file>