Problem with class-like script I try to implement

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1

Sorry if this come as a noob question but here is my problem.

I have two script, the first is main.lua and the other is bigNumber.lua. My goal is to make some sort of incremental game.

main.lua :

import "bigNumber"

local bank = BigNumber:init(0, 0)
bank.add(bank, BigNumber:init(1, 0))
print(bank.number)

bigNumber.lua :

class('BigNumber').extends()

function BigNumber:init(_number, _power)
    self.number = _number
    self.power = _power
    return self
end

function BigNumber:add(otherBigNumber)
    self.number = self.number + otherBigNumber.number;
    self.power = self.power + otherBigNumber.power;
    return self
end

I just want to create some sort of class that can have a number and a power (both integer) and add two class like that, but in main.lua it print "2" where it should display "1"
Duplicating "bank.add(bank, BigNumber:init(1, 0))" multiple time and it still display "2"

What did I do wrong ?

2

My feeling is that I do not understand how to create two separate instance of "bigNumber"

I tried to instance another bigNumber and the first one got assigned the value of the second one

3

I don't code in Lua but I think that you have to call BigNumber(1, 0) (and not BigNumber:init(0, 0)) to create a new instance. You don't need to return self in the init method.

In your first code block, this line:

bank.add(bank, BigNumber:init(1, 0))

should be:

bank:add(BigNumber(1, 0))

NOTE: I understand that you are just trying things out but for cases like this, it would be better to just do:

bank.number += 1

to avoid garbage collection.

4

I found a solution. I did not know that "init" was a specific PlayDate thing

main.lua :

import "bigNumber"

local bank = BigNumber(5, 0)
bank:add(BigNumber(1, 0))
print(bank["Number"])

bigNumber.lua :

class('BigNumber').extends()

function BigNumber:init(_number, _power)
    self["Number"] = _number
    self["Power"] = _power
    return self
end

function BigNumber:add(otherBigNumber)
    self["Number"] = self["Number"] + otherBigNumber["Number"]
    self["Power"] = self["Power"] + otherBigNumber["Power"]
end

return bigNumber