Re: Extracting a List from a List of lists

From:

Lew <lew@nospam.lewscanon.com>

Newsgroups:

comp.lang.java.programmer

Date:

Thu, 08 Feb 2007 20:02:29 -0500

Message-ID:

<eIidnebV1cm7VVbYnZ2dnUVZ_hWdnZ2d@comcast.com>

It helps other readers if you distinguish who wrote what.

Michael Rauscher wrote:

List<List<String>> res;

1. for ( int i = 0, n = res.size(); i < n; i++ )
        List<String> l = res.get(i);

2. Iterator<List<String>> it = res.iterator();
    while ( it.hasNext() )
        List<String> l = it.next();

3. for ( List<String> l : res )

Damo wrote:

But if I use those ways you mentioned , each time around the loop l
will contain a different list, i wont be using the lists in the loop.
so at the end of the loop i will only have one list, ie the last one.

That has nothing to do with using Michael's suggestion but with what you do
with the result each time through the loop. The assumption in Michael's
suggestion is that you will

do something useful with each list

during each iteration.

You cannot expect newsgroup answers to write out every line of code. You
should impute the missing parts. If you "won't be using the lists in the loop"
then you only have yourself, not Michael, to blame.

- Lew