Let me cut right to the chase. How exactly would I go about grabbing a random item with in a table IF it’s boolean value is true. Essentially, I want to randomly select something from the table, but what’s selected must be set to false rather than true if that makes sense.
I’ve considered, math.random for getting a random thing with in the table, but how exactly to get something with a value of false specifically and avoiding any thing that is set as true.
Any examples or ideas? Below is the layout of my table too. If you need further clarification I’m willing to explain.
Uh sorry, gotta fix something real quick. otherwise the concept is the same
you just have to make a new table with the values that are false and then select a random item from them.
So one solution that I thought of just now has 2 parts: 1st part is do as you are doing now except I question why you say
table[math.random(1, #UsedCharacters)]
instead of
UsedCharacters[math.random(1, #UsedCharacters)]
After you get the random value, you will use a while loop to check if the value is true or false depending on what you need it to be. If it is not what you need it to be, then go up one value and check that one. If that one is not what you need, then go down one from the original value. If that is not what you need then go up 2 from the original value. If that is not what you need then go down 2 from the original value. Until you find a value that can be used, you just keep going up 1 then down 1 from the randomly selected value and then up 2 down 2 then up 3 down 3 checking all the closest values to the randomly picked value.
Here is a working snippet I made. Just make sure to have the latest version of my library
local Math = require(script.ModuleScript)
local t = {
a = false,
b = true,
c = false
}
local filteredTable = Math.filterT(t, function(value, key)
return value == false
end)
local keys = Math.keysT(t)
local randomKey = keys[math.random(1, #keys)]
print(randomKey)
So we’ve got it so it chooses a random object from the table if it’s boolean value is false, but I need to take the object thats chosen with in the table and make it’s value true, so it’s avoided in the future.
So you want to set the value to false if the index is chosen? If so you will need to update the index through the original table since Math.filter returns a clone of the original table but is just filtered.
To respond to @IlyasTawawe , I didn’t even write the code but no it would not crash the script or thread. As for performance, it is one of the best without creating new arrays or tables and without compromising the randomness. If you create a new table, you can make it significantly faster IF you are doing it on a large quantity of data.
To respond to Juggersnaut, I don’t know what his module does. To use a while loop, it would look something like this:
local max = #UsedCharacters
local rand = math.random(1, max)
local numUp = rand
local numDown = rand
local selected = nil
while true do
if UsedCharacters[numUp]==true then
selected=numUp
break
elseif UsedCharacters[numDown]==true then
selected=numDown
break
end
numUp = numUp+1
numDown = numDown-1
if numDown < 0 then
numDown=0
if numUp==max then break end
end
if numUp > max then
numUp = max
if numDown==0 then break end
end
end
if not selected then
print("Found none true")
else
print("Found "..tostring(selected).." to be true")
end
It would work, but you’re doing guess work. your function’s speed can go from the best to the absolute worst depending on the situation. on the other hand doing it the table way will guarantee the consistency and the speed in any case with a penalty of temporary small memory footprint!
