Re: Using Lua to combine CSV files

[Rici Lake <lua@...>]

On 26-Jun-07, at 1:05 PM, Shmuel Zeigerman wrote:

> chandan datta wrote:
> > Thanks /Shmuel  /for the code,but it would really help if someone 
> > comes up a faster way-or if at all doing this in Lua is a good idea.
>
> You can create an index file (similar to "table of contents" in a 
> book).
> Creating such an index is slow but using is very fast.
> It will contain offsets into the log files, so it'd be possible
> to "jump" to the required record (or group of records) - rather than
> doing a linear search.

Presumably, the files are in order, so you could do a binary search
instead of a linear search, even though the records are variable
length. Use the :seek() method to move about in the file.