Re: split method?

[Norbert Kiesel <nkiesel@...>]

On Mon, 2011-06-27 at 12:37 -0400, Dave Collins wrote:
> I’ve used this split (string to table) method I found here:
> http://stackoverflow.com/questions/1426954/split-string-in-lua.
> 
>  
> 
> I’ve got it working, but I don’t understand it.

Read the manual again, especially the part about Function calls (2.5.8).

> 
>  
> 
> function string:split(delimiter)
> 
>       local result = { }   
> 
>       local from  = 1   
> 
>       local delim_from, delim_to = string.find( self, delimiter, from
> )   
> 
>       while delim_from do     
> 
>             table.insert( result, string.sub( self, from ,
> delim_from-1 ) )     
> 
>             from  = delim_to + 1     
> 
>             delim_from, delim_to = string.find( self, delimiter, from
> )   
> 
>       end   
> 
>       table.insert( result, string.sub( self, from  ) )   
> 
>       return result 
> 
> end 
> 
>  
> 
> This is how I’m calling it:
> 
>  
> 
> local myDateString = "2011-06-21"
> 
> local myDateTbl = myDateString.split(myDateString,"-")

You could (should?) call it like that:

local myDateTbl = myDateString:split("-")

Function definitions using : add an implicit first parameter called
"self".  Again, read section 2.5.8 of the manual (or the relevant
sections from the wonderful Lua Wiki).

</nk>