Trying to understand a few concepts

[MoonWitch]

I am working through oBindings by haste -- making sense of it... And I got to this little bit which even my googleFu can't understand

Basically I get lost on the

for key, action in next, tbl do

I have NO idea what the function of the next there is. Normally it should be a keyword/function to go to the next part of the table, but in this I just don't get what it does.
-- Note the comments are mine and may not make sense.

function _NS:RegisterKeyBindings(name, ...)
  local bindings = {}
  
  for i=1, select('#', ...) do -- for i=1, number of entries in the ellipsis (which are the possible tables passed via registerkeybindings)
    local tbl = select(i, ...) -- pushes the possible tables into tbl
    for key, action in next, tbl do -- puts [x] into key, the value into action of tbl
      if(type(action) == 'table') then -- ??
        for mod, modAction in next, action do -- (['CTRL-V'] = 'Paste' - CTRL = mod, 'paste' is modAction)
          if(not bindings[key]) then -- if no key is listed, it's just a spell, so increment and bind it to the number keys
            bindings[key] = {}
          end
 
          bindings[key][mod] = modAction
        end
      else
        bindings[key] = action -- normal keybind
      end
    end
  end
 
  _BINDINGS[name] = bindings
end

For those of you willing to see the entire code instead of just a part :
https://github.com/haste/oBindings/b...r/bindings.lua

[Lombra]

"t/l" is a typo? Either way, doing that should, for all intents and purposes, be the same as using pairs, because basically pairs returns a function, whereas here you just provide a function directly. Not completely sure of the details and too tired to elaborate right now!

[MoonWitch]

Originally Posted by Lombra "t/l" is a typo? Either way, doing that should, for all intents and purposes, be the same as using pairs, because basically pairs returns a function, whereas here you just provide a function directly. Not completely sure of the details and too tired to elaborate right now!

Yep, typo.. Fixed now -- sorry

Sooo

for key, action in next, tbl do

is just a more confusing way to say

for key, action in pairs(tbl) do

edit : tbl isn't a typo, I typed tbl and it changed after saving the post....

[Duugu]

Originally Posted by MoonWitch is just a more confusing way to say for key, action in pairs(tbl) do

Exactly. From http://www.lua.org/manual/5.2/manual.html#pdf-pairs:

If t has a metamethod __pairs, calls it with t as argument and returns the first three results from the call. Otherwise, returns three values: the next function, the table t, and nil

[MoonWitch]

Ah thanks, this helps tremendously.

Yes, this is how I learn, by picking apart addons and walk myself through the code in my own language.