Table Functions

brennanv · February 22, 2014, 12:53am

I am trying to have a Nuke Balloon remove all balloons on the screen. Currently whenever I run this function it returns nil for the balloons

local function RemoveAllBalloons() &nbsp;&nbsp;&nbsp;&nbsp;for i=1, #balloons do &nbsp; &nbsp; &nbsp; &nbsp; print(balloons[i].MyName) &nbsp; &nbsp; end end &nbsp;

Therefore whenever I change the print to balloons[i]:removeSelf() of course it is going to result in an error.

Whenever i spawn a balloon this is the code that I use

local function SpawnBalloon() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local balloon = display.newImageRect( "Balloon.png", 72, 72 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon.y = display.contentHeight + 150 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon.rotation = 0 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon.MyName = "Balloon" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon.score = 1; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon.positioninballons = #balloons+1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon.x = math.random(30, display.contentWidth - 30) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;group:insert( balloon ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;table.insert( balloons, balloon.positioninballons, balloon ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;physics.addBody( balloon, { density=1.0, friction=0.3, bounce=0.3 } ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local function touchHandler( event ) &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon:removeSelf() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;table.remove(balloons, positioninballons) &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;myData.score = myData.score + 1 &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PlayerScore.text = "Score: " .. myData.score &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon:addEventListener("touch", touchHandler) end &nbsp;

Spawns the balloon no problem and everything works fine. Now when it comes to the nuke balloon the touchHandler function is a bit different

local function touchHandler( event ) &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon:removeSelf() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;table.remove(balloons, positioninballons) &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;myData.score = myData.score + 1 &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PlayerScore.text = "Score: " .. myData.score &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;transition.to(flash, {alpha=1, time=50}) &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;RemoveAllBalloons() &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;timer.performWithDelay(100, ResetFlash, 1) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon:addEventListener("touch", touchHandler) &nbsp;

So I am pretty sure that I have everything written correctly, as in syntax that is. There is just a problem when it comes to removing them or even printing them. I have no idea why every single table index is coming back as nil and if anyone can explain to me why that would be much appreciated.

Deleur_Apps · February 22, 2014, 1:16am

do this:

local balloon = {} local function SpawnBalloon() local currBalloon = #balloon+1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon] = display.newImageRect( "Balloon.png", 72, 72 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].y = display.contentHeight + 150 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].rotation = 0 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].MyName = "Balloon" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].score = 1; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].positioninballons = [currBalloon] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].x = math.random(30, display.contentWidth - 30) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;group:insert( balloon[currBalloon] ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;physics.addBody( balloon[currBalloon], { density=1.0, friction=0.3, bounce=0.3 } ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local function touchHandler( event ) &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon]:removeSelf() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon] = nil &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;myData.score = myData.score + 1 &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PlayerScore.text = "Score: " .. myData.score &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon]:addEventListener("touch", touchHandler) end &nbsp;

*have not tested this*

Deleur_Apps · February 22, 2014, 1:16am

do this:

local balloon = {} local function SpawnBalloon() local currBalloon = #balloon+1 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon] = display.newImageRect( "Balloon.png", 72, 72 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].y = display.contentHeight + 150 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].rotation = 0 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].MyName = "Balloon" &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].score = 1; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].positioninballons = [currBalloon] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon].x = math.random(30, display.contentWidth - 30) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;group:insert( balloon[currBalloon] ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;physics.addBody( balloon[currBalloon], { density=1.0, friction=0.3, bounce=0.3 } ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;local function touchHandler( event ) &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon]:removeSelf() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon] = nil &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;myData.score = myData.score + 1 &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PlayerScore.text = "Score: " .. myData.score &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;balloon[currBalloon]:addEventListener("touch", touchHandler) end &nbsp;

*have not tested this*