A loop in a loop, breaking both loops

[Sheepolution]

Code: Select all

for i=1,10 do
  	_j = 0
 	for j=1,10 do
 			print(j)
 			_j = j
 		if (j==4) then
 			
 			break
 		end
 	end
 	if (_j~=10) then
 		break
 	end
 end

This is what I have right now. It works, but I feel like I'm overdoing stuff. Something too do this easier? Is there a Lua function I'm missing maybe?

[ferdielance]

Depending on your needs, the following may work more simply, or may not be practical at all.

* A: Put the whole double loop structure inside a function, and use return to get out when the time comes. (Not good in situations where having a function call every time you do the double loop is too costly)

* B: Use while for the outer loop (while counter<= value and looping == true do) and set "looping" to false in the inner loop when the time comes. This feels neater to me than having a separate break outside.

[Lafolie]

Why are you doing this? Sounds like a while loop would be much more useful.

[adnzzzzZ]

You can always use goto to break from nested loops. I'm ready

[slime]

You can always use goto to break from nested loops. I'm ready

goto is only in Lua 5.2 and LuaJIT, not regular 5.1 (which is what love uses by default.)

[Sheepolution]

Depending on your needs, the following may work more simply, or may not be practical at all.

* A: Put the whole double loop structure inside a function, and use return to get out when the time comes. (Not good in situations where having a function call every time you do the double loop is too costly)

* B: Use while for the outer loop (while counter<= value and looping == true do) and set "looping" to false in the inner loop when the time comes. This feels neater to me than having a separate break outside.

So something like this?

Code: Select all

i, loop = 1, true
 while (i<10 and loop) do
 	for j=1,10 do
 		print(j)
 		if (j==4) then
 			loop = false
 			break
 		end
 	end
 	i=i+1
 end

It does indeed look cleaner.

Why are you doing this? Sounds like a while loop would be much more useful.

I'm trying to make a tile-based platformer. I need to check all tiles, and if I hit a solid one, both loops need to break.

[Jasoco]

There's a better way to do collision detection with a grid. A simpler way that doesn't require you to do this.

How is your level tile layout formatted? Are you using a grid like you should?