Re: split method?

[Wesley Smith <wesley.hoke@...>]

> I’ve got it working, but I don’t understand it.
>
>
>
> 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,"-")
>
> dump_table(myDateTbl)
>


I think this function could be a lot simpler.  string.gmatch is more
suited to this type of problem than string.find IMHO:

local myDateString = "2011-06-21"

function string:split(delim)
	local res = {}
	for v in self:gmatch(string.format("([^%s]+)%s?", delim, delim)) do
		res[#res+1] = v
	end
	return res
end

local myDateTbl = myDateString.split(myDateString,"-")
print(unpack(myDateTbl))