Please help me to simplify this code

General
1 
function setup()
    obj0=456
    obj1=9899
    obj2=5453
    obj3=54
    obj5=3232
    obj6=232
    obj7="hello"
    obj8=889
    target=1
end
function draw()
    --//when user input "target" detected//--
    if target==0 then
        print(obj0)
    elseif target==1 then
        print(obj1)
    elseif target==2 then
        print(obj2)
    elseif target==3 then
        print(obj3)
    elseif target==4 then
        print(obj4)
    elseif target==5 then
        print(obj5)
    elseif target==6 then
        print(obj6)
    elseif target==7 then
        print(obj7)
    elseif target==8 then
        print(obj8)
    end
end

Now there are only 8 objs,but if I add to 50,I can’t imagine how many “elseif” I have to use.Is there any thing like"obj.target" in lua? Thanks!

2

Oh,Sorry for the terrible layout.It’s looks good on my draft.

3

You should use a table:

function setup()
    objects = {}
    target = 1

    -- Add your objects
    addObject( 456 )
    addObject( 9899 )
    addObject( "hello" )
    addObject( 123 )
    -- ... and so on
end

function addObject( value )
    table.insert( objects, value )
end

function draw()
    -- when user input "target" detected
    print( objects[target] )
end
4

Awesome!Thanks a lot!
Another question,I still couldn’t figure out where to put my picture in xcode when i use sprite like this

sprite("Documents:door",0,-open)

There aren’t any folder named"documents" in codea runtime neither xcode.
Do I have to change all my sprite to this

sprite("mypro:door",0,-open)

and copy all my pics to a folder named mypro.spritepack?

5

You can, or you can put a “Documents.spritepack” into Xcode. Then you won’t have to change your Lua code.

6

WOW! Excellent idea! Thanks a lot bro

7

If you have not read it, I recommend the online manual for Lua version 5.0 and its advice on constructing new tables. A variation on @Simeon’s advice would be:

function setup()
    obj = {
        [0] = 456, -- If you really want the first obj to be 'obj[0]'
        9899,
        5453,
        54,
        3232,
        232,
        "hello",
        889
    }
    target = 1
end

function draw()
    print(obj[target]) -- But generally not a good idea to have 'print()' called
                       -- up to 60 times a second
end
8

OK,I’ve already download it into my iPad.Thanks