count times each category exist in string

Question

I want to count times each category exist in string

Like the one 

http://www.acm.org/about/class/ccs98-html

the main problem is that word Like General appear more than once

and each general may or may not have sub categories

i want to count how many times each category come .

I needed ASAP.

Regards

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faheem

Answer 1

Can you explain better what kind of 'source' do you have? For example, do you have xml file or a flat string?

Answer 2

I have string.

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faheem

Answer 3

in that case, there isn't 'good answer' for all situations, because you are in a bad situation : context-dependence.

In general you have to define a BNF (a grammar) that represent your hypothetical language (see: http://www.cse.chalmers.se/edu/year/2011/course/TIN321/lectures/proglang-04.html) and you need to implement a lexer/parser that will produce structural entities. (see theory of programming language)

Answer 4

I agree

But it's very long way to do it.

I wanted a shortest path

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faheem

Answer 5

Is it possible to have regular expressions  for it.

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faheem

Answer 6

maybe not! Because it count only occurrence.

In my opinion there isn't a shortest path or better, BNF is the shortest path if you don't have a xml or similar data structures.

For example, the webpage (proglang-04.html) has a xhtml structures and you can try to parse it in xml document. After that you can analyze the XDocument to linq.

Observe:

String xml_docs = @"<?xml version=""1.0"" encoding=""UTF-8""?>  
<emails> 
    <emailAddress>[e-mail]</emailAddress> 
    <emailAddress>[e-mail]</emailAddress> 
    <emailAddress>rgreen@set_ig.ca</emailAddress>  
</emails>";


XDocument doc = XDocument.Parse(xml_docs); 
 
var emailAddresses = (from emails in doc.Descendants("emailAddress") 
                      select emails.Value); 
 
foreach (var email in emailAddresses) 
{ 
    //Comment out if using WPF or Windows Form project 
    Console.WriteLine(email.ToString()); 
 
   //Remove comment if using WPF or Windows Form project 
   //MessageBox.Show(email.ToString()); 
}