Stupid question: For _ , k ...

[ClockworkCake]

I apologize in advance for how stupid this question is, but as of yet I have not managed to find an adequate answer in any lua manuals, and the google has been mighty unhelpful.

Is 'for _ , k' any different than 'for v , k'? Is the underscore simply being used for the variable, rather than v, or does it do something fundamentally different?

I've seen it in several Gmod LUA scripts.

Sorry about being such a newbie.

[King Flawless]

Short answer Yes

Long answer
[lua]
abcd = {"a","b","c","d"}
for _,v in pairs(abcd) do
print(_,v)
end
[/lua]

Output

1	a
2	b
3	c
4	d

[Donkie]

I've learned that _ means lua shouldn't care about making a local variable about that.
[lua]
concommand.Add("test_tsetse",function(_,_,args)
end)[/lua]
could therefor be used on a clientside concommand.

[Nev]

There is no difference; "_" is a perfectly valid variable name.

[ralle105]

And most people use it to indicate that that variable won't be used in the code (but as stated it very well can be)

[ClockworkCake]

[QUOTE=ralle105;29760996]And most people use it to indicate that that variable won't be used in the code (but as stated it very well can be)[/QUOTE]

Alright! Awesome.

Thanks very much, internet. :D

[c-unitV2]

[QUOTE=ralle105;29760996]And most people use it to indicate that that variable won't be used in the code (but as stated it very well can be)[/QUOTE]

This should be added to the table tutorial on the wiki if it already isn't, I have seen quite a few now get confused about this exact topic

[Buggzie]

I normally use _ because I don't need a k in that foreach loop, but mainly use it in a second foreach loop eg

[lua]for _, v in pairs( player.GetAll() ) do
for k, g in pairs( ents.GetAll() ) do
if g == v then print( tostring( v ) ) end
end
end[/lua]

I don't use that above, it's just a stupid example.

[c-unitV2]

[lua]for _, v in pairs( ents.GetAll() ) do
if( v:IsPlayer() ) then
print( tostring( v ) )
end
end[/lua]

:v:

[Buggzie]

[QUOTE=c-unitV2;29766548][lua]for _, v in pairs( ents.GetAll() ) do
if( v:IsPlayer() ) then
print( tostring( v ) )
end
end[/lua]

:v:[/QUOTE]

I normally use something like that too.