CODEWITHSUNDEEP
stringif-statementpropertiesluaroblox
Lurk
Lurk

Reputation: 23

lua checking multiple values for equailty

I like to make games in Roblox and I code in lua. Well coding games I find myself asking if a value equals another value a lot and it can make really long lines of code and can be quite repetitive.

For example:

if x.ClassName == 'Shirt' or
x.ClassName == 'Accessory' or
x.ClassName == 'Pants' or
x.ClassName == 'CharacterMesh' then
-- do thing
end

doing that not only can be very messy but is also just asking the same thing over and over again slightly modified.
I was wondering if there was a way in lua to ask if a value equals multiple diferant separate values

For example:

if x.ClassName == ( 'Shirt' or 'Accessory' or 'Pants' or 'CharacterMesh' ) then
-- do thing
end

Upvotes: 2

Views: 3719

Answers (2)

lhf
lhf

Reputation: 72312

You could do something like this:

if string.match('/Shirt/Accessory/Pants/CharacterMesh/', '/'..x.ClassName..'/') then ... end

but it's unlikely to be any faster than the if chain you have.

Upvotes: 0

Diego Pino
Diego Pino

Reputation: 11576

There's no native way to do this in Lua but you can implement a helper function set to achieve that.

function set(...)
   local ret = {}
   for _,k in ipairs({...}) do ret[k] = true end
   return ret
end

local classname = 'Shirt'
if set('Shirt', 'Accessory', 'Pants', 'CharacterMesh')[classname] then
   print('true')    
end

Upvotes: 4

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