[Solved] (typo) How can I save a list of args in a variable, and call a function with it?

[cloudfrog]

A sample is worth a thousand words. Take the following line:

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love.graphics.setColor( 228/255, 6/255, 38/255, 1)

I want to define my color value elsewhere, and then set it when needed. I don't want to have to store r,g,b,a separately though. Below is what I would like to do, just not sure exactly how.

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-- in love.load() for example
Settings.myColor = { 228/255, 6/255, 38/255, 1 }


-- Later in my draw()
love.graphics.setColor(Settings.myColor)

[veethree]

setColor can take a table as an argument.

Just do

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love.graphics.setColor(Settings.myColor)

[MrFariator]

As veethree pointed out, you can just use a table. However, for some functions that do not allow a table to be passed, you can still wrap the arguments in a table, and use unpack().

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local arguments = { 4, 2, 1 }
local myFunction = function ( arg1, arg2, arg3 )
  print(arg1, arg2, arg3) -- prints: 4, 2, 1
end
myFunction ( unpack(arguments) )

Of course, I wouldn't recommend you to rely on this too much, or in time critical code, because unpack() can be fairly slow. In a case like this, where the number of arguments is known, it'd be better to do just:

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local arguments = { 4, 2, 1 }
local myFunction = function ( arg1, arg2, arg3 )
  print(arg1, arg2, arg3) -- prints: 4, 2, 1
end
myFunction ( arguments[1], arguments[2], arguments[3] )

[pgimeno]

Beware of nil values in the arguments, though, as those will cause unpack() to stop returning arguments.

[dusoft]

A sample is worth a thousand words. Take the following line:

Code: Select all

love.graphics.setColor( 228/255, 6/255, 38/255, 1)

I want to define my color value elsewhere, and then set it when needed. I don't want to have to store r,g,b,a separately though. Below is what I would like to do, just not sure exactly how.

Code: Select all

-- in love.load() for example
Settings.myColor = { 228/255, 6/255, 38/255, 1 }


-- Later in my draw()
love.graphics.setColor(Settings.myColor)

Also, please use Support forum for this kind of questions.

[cloudfrog]

Ok... I'm sorry this was lack of coffee on my part. My first thought was that I already tried exactly that (pass the table as the args). and i did!

However in the code where i populate the table I actually had:

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Settings.debugCollisionColor = { 228/255,  6,255,  38/255 , 1}

Rather then an error, i was just getting the wrong color. I took a screenshot just now to show it. But when also setting up a test using named args s.r, s.g etc I was able to see the mistake.

Thank you all for the input.


Note taken on using the support forum.