how do i check if a value is nil?

fixylol · Post by **fixylol** » Sat Apr 16, 2016 1:30 pm

i tried "if not [value] then" and "if [value] == nil then" but it says its trying to index a nil value :/

bobbyjones · Post by **bobbyjones** » Sat Apr 16, 2016 2:24 pm

Make sure to check that the table exists.

If table then 
    If table[index] then
        Do stuff
    end
end

s-ol · Post by **s-ol** » Sat Apr 16, 2016 2:35 pm

Well its simpler to do

Code: Select all

if table and table.value then
end

Or 

if table and table.value == nil then
end

The problem seems to be thaz you try to do A.B but A is already nil.

fixylol · Post by **fixylol** » Sat Apr 16, 2016 2:51 pm

the table does exist, however

Code: Select all

if not table[value] then...

still causes an error.

T-Bone · Post by **T-Bone** » Sat Apr 16, 2016 3:55 pm

The error message states that the table does not exist.

If the table truly does exist, then there's no way we can help you with the information you have provided.

fixylol · Post by **fixylol** » Sun Apr 17, 2016 2:17 pm

whenever i put a for loop in LoadLevel (so the map resets when the player dies), it seems to crash, but when i put a line of code that points to the level, it seems to work fine :/

Robin · Post by **Robin** » Sun May 08, 2016 11:23 pm

Right, you're nearly there. The problem is that you have a doubly nested table. This should work:

Code: Select all

if not CurrentLevel[chartiley] or not CurrentLevel[chartiley][chartilex] then return end

how do i check if a value is nil?

how do i check if a value is nil?

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