How do i define multiple variables at once?

[TopDole]

I read most of the lua book a while back and have been coding for quite a while but i havent found out how to define multiple variables yet. Does anyone know? Is it even possible?

A couple things I tried that I wish worked:

P1.x, P2.x, P3.x, P4.x = 0
P1.x = P2.x = P3.x = P4.x = 0

[Wojak]

Code: Select all

P1.x, P2.x, P3.x, P4.x = 0,0,0,0

http://www.lua.org/pil/4.1.html

[zorg]

You can define multiple vars as how Wojak wrote, but you cannot assign one thing to multiple variables at once.

[s-ol]

You can define multiple vars as how Wojak wrote, but you cannot assign one thing to multiple variables at once.

You can write a helper though:

Code: Select all

function all( val, num ) 
 local r = {} 
 for i=1,(num or 10) do
  r[i] = val
 end
 return unpack(r)
end

-- use
local a, b, c, d, e = all( 0 ) -- for up to 10 vars
local a, b, C = all( 0, 3 ) 

[Muris]

I know this is bit of a derailing thing, but one of the best things I've found about lua is as following:

Code: Select all

 x, y = y, x 

The swapping is just so brilliant compared to other languages where you usually end up writing a helper function to do it.

[zorg]

code-snip

Don't forget to

Code: Select all

return unpack(r)

in that helper function though, else anything you define with that will be nil
Also our postcounts were in sync, and will be again if you reply

[s-ol]

-*Accidental double submit -

[s-ol]

code-snip

Don't forget to

Code: Select all

return unpack(r)

in that helper function though, else anything you define with that will be nil
Also our postcounts were in sync, and will be again if you reply

Whoops, That's what I get for coding on mobile...
yaaaaay