Re: Program to find occurences of a word in a file

From:

James Kanze <james.kanze@gmail.com>

Newsgroups:

comp.lang.c++

Date:

Tue, 20 Nov 2007 03:30:24 -0800 (PST)

Message-ID:

<ca4a2301-f00f-41ba-ba5a-f949c092801c@w28g2000hsf.googlegroups.com>

On Nov 20, 6:44 am, Sohail Somani <soh...@taggedtype.net> wrote:

On Mon, 19 Nov 2007 20:29:38 -0800, Neehar wrote:

I was asked to do this without sorting. Is there a better way to do
this?

This could eliminate the map based solutions as map does an
implicit sort on insertion.

Sort of, and of course, std::map.

I would think a hash based data structure might do, like
Python's dictionaries?

std::unsorted_map, from the next version of the standard?

Another alternative, if you're going to implement the underlying
data structure yourself, would be a trie. Still, I'd start with
std::map< Word, int >. The real problem would be defining Word;
we've not been given enough information to do this. (If the
definition is just the usual meaning in non-technical English,
then I don't think the problem is solvable. On the other hand,
just any sequence of non-white space characters, separated by
white space, makes the solution so trivial it certainly wouldn't
be asked with 30 minutes to solve it.)

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