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JC
Joined: 02 Jun 2006
Posts: 16
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 Posted: Wed Aug 09, 2006 4:45 pm Post subject: Dynamic Function Calls |
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Hi Folks,
I not sure if what I am trying to do is possible, hopefully someone will be able to shed some light. I want to pass a function name to a second function and get the second function to call the first one.
eg:
| Code: | Main(SubMain,"blah")
function Main(pName,pstuff)
execute function (pName)
stuff........
end
function SubMain()
stuff here........
end |
Can it be done ?
TIA,
JC
_________________
Remember, don't sweat the petty things
and don't pet the sweaty things....... |
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romero126
Joined: 24 Dec 2005
Posts: 200
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| Posted: Wed Aug 09, 2006 4:58 pm Post subject: |
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Yes
| Code: | Variables are handled as functions.
So any variable can be passed off as a function
If it doesnt error out that is.
function Main(pName, pStuff)
if (type(pName) == "function") then
result = pName() -- result is whatever pName returns
else
-- Not a function!@#?!
end
print(result)
end
function MySub()
-- blah blah blah
return "value" -- returns back to main.
end |
For more information http://www.lua.org/manual/5.0/manual.html#2.5.8 |
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daurnimator
Joined: 11 Dec 2005
Posts: 38
Location: melbourne, australia
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| Posted: Wed Aug 09, 2006 5:00 pm Post subject: |
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why wouldn't you?
try: (code works)
| Code: |
function SubMain()
screen:print(0,0,"test",Color.new(255,0,0))
end
function Main(func)
while true do
screen:clear(Color.new(255,255,255))
func()
screen.flip()
end
end
Main(SubMain)
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daurnimator
Joined: 11 Dec 2005
Posts: 38
Location: melbourne, australia
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| Posted: Wed Aug 09, 2006 5:13 pm Post subject: |
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| damn, beat me ;) |
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JC
Joined: 02 Jun 2006
Posts: 16
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| Posted: Wed Aug 09, 2006 5:23 pm Post subject: |
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Wonderful. Thanks for the help (and the quick replies).
JC
_________________
Remember, don't sweat the petty things
and don't pet the sweaty things....... |
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romero126
Joined: 24 Dec 2005
Posts: 200
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| Posted: Thu Aug 10, 2006 4:56 pm Post subject: |
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| daurnimator wrote: | why wouldn't you?
try: (code works)
| Code: |
function SubMain()
screen:print(0,0,"test",Color.new(255,0,0))
end
function Main(func)
while true do
screen:clear(Color.new(255,255,255))
func()
screen.flip()
end
end
Main(SubMain)
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No error-checking.
No way to terminate loop.
screen:clear() doesnt need to be called.
screen.flip() -- might not be needed.
Too much extra code and not enough explination.
Sorry I dont mean to nitpick at your code, but I thought it might help! |
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