Re: Reaching a table element - . and [] differs?

[Enrico Colombini <erix@...>]

Attila wrote:
> No matter if I use return t.id or t.a, the returning value is nil. After 
> that I used return t[id], and strange, that works perfectly. Can 
> somebody say me, what is the difference between . and []? Because the 
> reference manual says:
> "The language supports this representation by providing a.name as 
> syntactic sugar for a["name"]. There are several convenient ways to 
> create tables in Lua (see §2.5.7)."

t.id is the field indexed by the string "id" of the table t.

t[id] is the field indexed by the *value* contained in the variable 
'id', which is what you probably want.

  Enrico