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Math.random for objects?

Asked by
Codebot 85
9 years ago

I'm trying to pick a random ImageButton from my gui. I get a bad argument because random is expecting a number and not an Object.

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1this = script.Parent
2 
3local btn = this.Buttons:GetChildren()
4        for i = 1,#btn do
5            b = math.random(1,btn[i])
6            print(b)
7        end
8end
0
for some reason i think roblox updated that so it doesn't work anymore XD lomo0987 250 — 9y
0
@lomo0987 | ? What doesn't work anymore? What OP intended to make -will- work. Redbullusa 1580 — 9y

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1
Answered by
CaptainRuno 40
9 years ago

You don't need that extra 'btn' in there!

Instead of doing b = math.random(1,btn[i]) Try doing b = math.random(1,i) and then to get the random gui part just do local randomButton = btn[b]

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1
Answered by
Redbullusa 1580 Moderation Voter
9 years ago

OBJECTIVE

To pick a random ImageButton from your GUI.

UNDERSTANDING YOUR ERROR

"math.random is expecting a number and not an object."

The math.random function accepts at most two arguments, and they both must be integers.

You must be aware that this is a table:

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1local btn = this.Buttons:GetChildren()

Because the :GetChildren() method fetches every child in your this.Buttons and puts it in a table.

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1b = math.random(1, btn[i])

So what you're doing is you're indexing/accessing the table, so you get an object instead - which is the child of this.Buttons, but what you probably intended to pass an integer.

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1local this = script.Parent
2 
3local btn = this.Buttons:GetChildren()
4local RandomInteger = math.random(#btn) -- The minimum argument is assumed to be 1.
5-- RandomInteger is a number.
6 
7local RandomButton = btn[RandomInteger]
8-- Index the table with your RandomInteger (the random number).

You don't need a "for" loop, else you will iterate through ALL of the buttons when you only need 1.

Read up on arrays if you don't understand line 6.

Questions? Comments? Skepticism? Comment down below or PM me!

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