This is a read-only snapshot of the ComputerCraft forums, taken in April 2020.

local tArgs = { ... } WTF ?

Started by gabriel2anjos, 12 May 2012 - 01:09 AM

gabriel2anjos #1

gabriel2anjos's profile picture

6 posts

Posted 12 May 2012 - 03:09 AM

Hello! I'm writting some programs in lua in computercraft. Sometimes, when i'm looking some codes, i see this:

local tArgs = { ... } if #tArgs &amp;lt; 1 then printUsage() return end

It was taken from the gps program

Could someone explain me WHATTA HELL is this tArgs. I simply don't have idea…
One more little thing:


if not bOpen then

is the same as:


if bOpen == false then

???

OmegaVest #2

436 posts

Posted 12 May 2012 - 03:19 AM

1: tArgs are just Dan200's name for the variables pulled from the program line. So, when you put in "gps host 141 64 2", the "host", "141", "64" and "2" would be in the tArgs table. However, the actual call for that information comes from the … .

2: not means the reverse of whatever is immediately after it. So, not bOpen ( a boolean ) would be the same thing as bOpen == false.

gabriel2anjos #3

gabriel2anjos's profile picture

6 posts

Posted 12 May 2012 - 03:21 AM

Aaaah.
1- So the tArgs is just a name to the table?
2- The not act as a logical not, ok?

Xtansia #4

496 posts

Location New Zealand

Posted 12 May 2012 - 03:50 AM

Also

if not variable then

Can also be used in place of

if variable == nil then

For variables that aren't booleans