Functions Inside Table

Can you do that?

I'd like to do something like:

object = {
health = 10
  function removeHealth(health)
  self.health = self.health - health
  }
}
zombie = object
zombie.removeHealth(9)
print(zombie.health)

How could I?

Regards,
Augustas

looks to me like you got that code from somewhere that probably shows you how,given your use of the self variable… Anyways

object = {
  health = 10,
  removeHealth = function(self,health)
    self.health = self.health - health
  end
}

Not really, I know lua a limited level because of computercraft, but I know java object oriented programming, I'm trying to get the true version of how you do it in java by writing what I think is the closest between java and lua. Since I know you kind of have to do it in tables, nvm, I'm not gonna explain how my brain works xD

Thanks

Creating functions is as easy as creating a simple variable. Functions act as variables:

local myFunction = function (text)
  print(text)
end

function myFunction () … end is only a syntactical sugar. That's why you can assign functions to any variable you want.

Also, this line here:

zombie = object

Variables don't actually hold a table, only it's pointer to the memory, which means that now those two variables hold the same table. To have a copy of the table you could make a function which would take all contents from a table and put it into a new table.

It looks like you're creating a some sort of game using 'classes' in Lua. Many people prefer to use setmetatable to 'copy' and make a new instance of that table:


Using your metod:

local myClass = {
text = "Hello"
}

local myClassInstance = myClass

print(myClassInstance.text) -->> Hello
print(myClass.text) -->> Hello

myClassInstance.text = "World"

print(myClassInstance.text) -->> World
print(myClass.text) -->> World

Using setmetatable:

local myClass = {
text = "Hello"
}

local myClassInstance = setmetatable({}, {__index = myClass})

print(myClassInstance.text) -->> Hello
print(myClass.text) -->> Hello

myClassInstance.text = "World"

print(myClassInstance.text) -->> World
print(myClass.text) -->> Hello

If you have questions just ask!

Off topic: is there a chance you're from in Lithuania :P/>/>?

Yes it does. You don't need to use a forward declaration.

Oh never mind, now that I think about it I was getting it confused when using recurse.