What is difference between . and : in module script?

[ridanit_ruma (Rumaed)]

When I write a function while writing a module script, I was curious about the difference between “:” and “:”.

local module = ()

function module.DotFunction()

end

function module:ColonFunction()

end

return module

Both work fine, but I know there is a difference when using module scripts.

local ModuleScript = require(game.ServerScriptService.ModuleScript)

ModuleScript.DotFunction()
ModuleScript:ColonFunction()

Does anyone know anything about this?

[TheRealANDRO (ANDRO)]

The : operator is a shorthand for module.ColonFunction(module, ...), it passes the object that the function has been called from as it’s first argument. Very useful for OOP.

[ridanit_ruma (Rumaed)]

So…
“ServerScript”

require(game.ServerScriptService.ModuleScript):Hello()

“ModuleScript”

local module = {}

function module:Hello(arg)
    print(arg)
end

return module

the output is “ServerScript”?

[TheRealANDRO (ANDRO)]

@ridanit_ruma

function module:Hello(arg)
    print(arg)
end

When this function is written as:

function module.Hello(object)
    print(object)
end

The output will be the module table itself.
{Hello = function 0x.....}