How would I make for loop, loop in order through a table?

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#1

How would i make this for loop loop through this table in order

 local petTable = {
        Bunny = 20,
        Dog = 60,
        Cat = 100,
    }
    

    for i, v in pairs(petTable) do
        print(rng)
        if rng <= v then
            print(v)
            selectedRarity = v
            
            if v == 20 then
                local pet = "Bunny"
                costCheck(plr, pet)
            elseif v == 60 then
                local pet = "Dog"
                costCheck(plr, pet)
            elseif v == 100 then
                local pet = "Cat"
                costCheck(plr, pet)
            end
            
            break
        end
        rng -= v
    end

I am trying to make it so it loops first bunny, then dog, then cat. However it keeps starting with dog. How would I do this?

#2

Change pairs to ipairs.

Pairs will iterate through the table in a random order, while ipairs iterates through the table in order.

#3

Then the for loop doesnt even trigger @daisytheghostchild98

Looping through metatables
#4

It’s because what you’re storing is a Dictionary Table, which doesn’t have an ordered index. Imagine this, if we had a simple table with just numbers like so:

local simpleTableWithJustNumbers = { 10, 20, 500, 300, 2 }

This with the indexes (visual purposes only) would look like this.

local simpleTableWithJustNumbers = { 
    [1] = 10, 
    [2] = 20, 
    [3] = 500, 
    [4] = 300, 
    [5] = 2 
}

And if we used a for loop with ipairs, this would iterate in order (from index 1 to 5). This comes to the issue with your code, this is how you would visualise your table.

local petTable = {
    ["Bunny"] = 20,
    ["Dog"] = 60,
    ["Cat"] = 100,
}

There’s no way to numerically order this, how does the program know how to organise this? It doesn’t. So a work around for this is to store these properties in tables, like so (this is another visual example of what it would look like to the program):

local petTable = {
    [1] = {
        PetName = "Bunny",
        Rarity = 20
     },
    [2] = {
        PetName = "Dog",
        Rarity = 60
    },
    [3] = {
        PetName = "Cat",
        Rarity = 100
    }
}

Now the program knows how to iterate through them (order being Bunny, Dog and Cat). In that case, this is your updated code, I hope this helped you. :slight_smile:

local petTable = {
	{
		PetName = "Bunny",
		Rarity = 20
	},
	{
		PetName = "Dog",
		Rarity = 60
	},
	{
		PetName = "Cat",
		Rarity = 100
	}
}

for i, v in ipairs(petTable) do
	print(rng)
	
	if rng <= v.Rarity then
		print(v.Rarity )
		selectedRarity = v.Rarity 
		
		local pet
		
		if v.Rarity == 20 then
			pet = "Bunny"
			costCheck(plr, pet)
		elseif v.Rarity == 60 then
			pet = "Dog"
			costCheck(plr, pet)
		elseif v.Rarity == 100 then
			pet = "Cat"
			costCheck(plr, pet)
		end
		
		print(pet)
		
		break
	end
	
	rng -= v.Rarity
end
2 Likes
#5

@xmthl Tysm for helping with this one your a good programmer :slight_smile:

1 Like
#6

Not a problem, I’m glad I could help. :slight_smile:

1 Like
#7

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