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Search for repeated character combinations

khalidelmeknesi8-Sep-09 2:07

8-Sep-09 2:07

Hi everybody,

I have an tool that reads an file. That file has for example the follow content:

²{öï#°ÿùpO¬[ÿùpO¬ÿùpO¬¿ÿùpO¬ñÿùpO#ÿùpONÿ

I would like to search for repeated character combinations like the bold characters. The character combination ùpO repeated 6 times.

I would like to return some top 5 with the most repeated character combinations. Something like this:

ùpO : 6 times
xyz : 5 times
ab4 : 3 times
ab : 2 times
66 : 2 times

This is the code that reads the file:

string path = @openFileDialog1.FileName;
                try
                {
                    // Open the stream and read it back.
                    using (FileStream fs = File.OpenRead(path))
                    {
                        byte[] b = new byte[1024];
                        //UTF8Encoding temp = new UTF8Encoding(true);
                        UTF7Encoding temp = new UTF7Encoding(true);

                        while (fs.Read(b, 0, b.Length) > 0)
                        {
                            textBox1.Text += temp.GetString(b);

                        }
                    }
                }

Thanks!

Re: Search for repeated character combinations

sanforjackass8-Sep-09 2:58

sanforjackass

8-Sep-09 2:58

if you want to clculate how many each char repeat you can use this:

string[] s;
s=File.ReadAllLine(@"file name.txt");
int[] c=new int[255];
for(int y=0y

Re: Search for repeated character combinations

khalidelmeknesi8-Sep-09 3:08

khalidelmeknesi

8-Sep-09 3:08

I dont whant to count each character. I would like to discover some repeated character combinations.

Re: Search for repeated character combinations [modified]

sanforjackass8-Sep-09 4:00

sanforjackass

8-Sep-09 4:00

string s="xlstxtjpgxls";
string[] f = {"xls","txt","jpg" };
int[] x=new int[f.Length];
for (int y = 0; y < f.Length; y++)
{
for (int i = 0; i < s.Length; i++)
{
for (int j = 0; j < f[y].Length; j++)
{
if (f[y][j] != s[i + j])
{
break;
}
if (j == f[y].Length - 1)
{
x[y]++;
}
}
}
}
for (int g = 0; g < f.Length; g++)
{
Console.WriteLine(f[g]+":"+x[g]);
}
Console.ReadLine();

modified on Friday, September 11, 2009 4:57 PM

Re: Search for repeated character combinations [modified]

khalidelmeknesi16-Sep-09 22:48

khalidelmeknesi

16-Sep-09 22:48

I have found this example but it is not 100 % good. Could you please have a look?

using System;<br />
using System.Collections.Generic;<br />
using System.Linq;<br />
using System.Text;<br />
<br />
namespace ConsoleApplication1<br />
{<br />
    class Program<br />
    {<br />
        static void Main(string[] args)<br />
        {<br />
            string _givenString = "wvtnfhxyz1hdxyz1fdxyz1ejxyz1dhxyz1dxyz1eeaa1oeys";<br />
            Dictionary<string, int> _codes = new Dictionary<string, int>();<br />
            int _startingPoint = 0;<br />
            while (_startingPoint < _givenString.Length)<br />
            {<br />
                for (int j = 2; j < _givenString.Length; j++)<br />
                {<br />
                    for (int i = _startingPoint; i < _givenString.Length && i + j < _givenString.Length; i++)<br />
                    {<br />
                        if (!_codes.ContainsKey(_givenString.Substring(i, j)))<br />
                        {<br />
                            _codes.Add(_givenString.Substring(i, j), 1);<br />
                        }<br />
                        else<br />
                        {<br />
                            _codes[_givenString.Substring(i, j)] += 1;<br />
                        }<br />
                    }<br />
                }<br />
                <br />
                _startingPoint++;<br />
            }<br />
<br />
            List<KeyValuePair<string, int>> _sortedCodes = SortDictionary(_codes);<br />
            for (int i = 0; i < 5; i++)<br />
            {<br />
                Console.WriteLine(_sortedCodes[i].Key + " : " + _sortedCodes[i].Value + " times");<br />
            }<br />
            Console.ReadKey();<br />
        }<br />
<br />
        public static List<KeyValuePair<string, int>> SortDictionary(Dictionary<string, int> data)<br />
        {<br />
            List<KeyValuePair<string, int>> result =<br />
                  new List<KeyValuePair<string, int>>(data);<br />
            result.Sort(<br />
              delegate(<br />
                KeyValuePair<string, int> first,<br />
                KeyValuePair<string, int> second)<br />
              {<br />
                  return second.Value.CompareTo(first.Value);<br />
              }<br />
              );<br />
            return result;<br />
        }<br />
    }<br />
}

modified on Thursday, September 17, 2009 8:13 AM

Re: Search for repeated character combinations

sanforjackass18-Sep-09 12:05

sanforjackass

18-Sep-09 12:05

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CountString
{
class Program
{
static void Main(string[] args)
{
string _givenString = "wvtnfhxyz1hdxyz1fdxyz1ejxyz1dhxyz1dxyzeeaa1oeys";
Dictionary<string, int> _codes = new Dictionary<string, int>();
int _startingPoint = 0;
//while (_startingPoint < _givenString.Length)
//{
for (int j = 2; j < _givenString.Length; j++)
{
for (int i = _startingPoint; i < _givenString.Length && i + j < _givenString.Length+1; i++)
{
if (!_codes.ContainsKey(_givenString.Substring(i, j)))
{
_codes.Add(_givenString.Substring(i, j), 1);
}
else
{
_codes[_givenString.Substring(i, j)] += 1;
}
}
}
// _startingPoint++;
//}

List<KeyValuePair<string, int>> _sortedCodes = SortDictionary(_codes);
for (int i = 0; i < 5; i++)
{
Console.WriteLine(_sortedCodes[i].Key + " : " + _sortedCodes[i].Value + " times");
}
Console.ReadKey();
}

public static List<KeyValuePair<string, int>> SortDictionary(Dictionary<string, int> data)
{
List<KeyValuePair<string, int>> result =
new List<KeyValuePair<string, int>>(data);
result.Sort(
delegate(
KeyValuePair<string, int> first,
KeyValuePair<string, int> second)
{
return second.Value.CompareTo(first.Value);
}
);
return result;
}
}
}

does it work as you want??

Re: Search for repeated character combinations

Ian Shlasko8-Sep-09 5:41

Ian Shlasko

8-Sep-09 5:41

Well, I'm sure there's a better algorithm for this, but here's one off the top of my head:

Note that this is NOT an efficient algorithm, and will NOT earn you any prizes if this is a school assignment (And if that's the case, keep in mind your teacher may be reading this).

NONE

1. Keep a string:int dictionary of substring:count

2. Loop through each character:
  a. Looping from 2 to your maximum substring size (Say, 5)
    i.  Grab the substring of that length from the current position
    ii. Add/increment it in the dictionary

3. Look through the dictionary keys:
  a. See if the key is a substring of any other keys, with an equal count... If so, just delete this key.

Grab 'em, sort 'em, and display 'em...

If you want a better algorithm, you could try posting this in the Algorithms forum... I would guess there are at least a dozen formalized and documented algorithms to handle this, with all sorts of fancy names, that the folks there could point you to.

Proud to have finally moved to the A-Ark. Which one are you in?
Developer, Author (Guardians of Xen)

Re: Search for repeated character combinations

khalidelmeknesi8-Sep-09 21:48

khalidelmeknesi

8-Sep-09 21:48

Thanks for you answer, but I dont understand it to make it in code. Could you please make an example code? many thanks

Redirect Console for In-Memory Execution

Anindya Chatterjee8-Sep-09 1:49

Anindya Chatterjee

8-Sep-09 1:49

Hi,

I am developing a scripting tool in which I want to compile and execute the code in MEMORY, not as an executable file. But in there I need to redirect the console output to a Richtextbox and input to a simple textbox.

Example:

The script code is like this

public class Script
{
     public static void Main()
     {
          Console.WriteLine("Hello World");
          Console.ReadKey();
     }
}

When I compile and execute in memory I want to print "Hello World" in a richtextbox and input the key from a textbox to terminate the application.

How can I accomplish it? I know how to redirect input/output if it is an executable file, but I don't know how to do the same for in-memory execution. Can anyone please help me?

Anindya Chatterjee
--------------------------------------------------------
1. Don't Visit ..[^]

2. But Watch ..

Re: Redirect Console for In-Memory Execution

Not Active8-Sep-09 2:19

Not Active

8-Sep-09 2:19

What is the benefit you are seeking by compiling and executing in memory? Does it outweigh the risks of potential security vulnerabilities this exposes?

If this needed, why compile an entire application, just use the particular method that is necessary for your functionality.

only two letters away from being an asset

Re: Redirect Console for In-Memory Execution

Anindya Chatterjee8-Sep-09 3:27

Anindya Chatterjee

8-Sep-09 3:27

That is not the point. OK instead of in-memory execution I invoke the entry point function from the compiled assembly. But there also how would I redirect the console input output to a textbox or richtextbox?

Anindya Chatterjee
--------------------------------------------------------
1. Don't Visit ..[^]

2. But Watch ..

Re: Redirect Console for In-Memory Execution

Not Active8-Sep-09 3:36

Not Active

8-Sep-09 3:36

Anindya Chatterjee wrote:
how would I redirect the console input output to a textbox or richtextbox?

You don't. Execute the method from the assembly, get the output, then assign it to the textbox in your application.

only two letters away from being an asset

Re: Redirect Console for In-Memory Execution

Anindya Chatterjee8-Sep-09 3:43

Anindya Chatterjee

8-Sep-09 3:43

Sorry, I didn't get that.
If the script has a line like:

Console.WriteLine("Hello World");

then how would I get the output and assign to the textbox? That entry-point function is not returning any string. If I am wrong please correct me with some example.
And also what about

Console.ReadKey() or Console.ReadLine(...) ?

Thanks and regards,

Anindya Chatterjee
--------------------------------------------------------
1. Don't Visit ..[^]

2. But Watch ..

Re: Redirect Console for In-Memory Execution

Not Active8-Sep-09 4:14

Not Active

8-Sep-09 4:14

That's the point you can't do this. And why would you want to? If you have a textbox in your application and you need to pass the value from the textbox to an external application, then why do you need to try reassigning the input stream? Sounds more like you need to refactor the external application.

only two letters away from being an asset

how to change individual gridline color in datagridview

gtag8-Sep-09 1:48

gtag

8-Sep-09 1:48

Hi,

In datagridview, I want to change the color of particular gridline.

There is option to change all gridlines to any color but want to change particular gridline color.

Thanks in Advance.

GTag

XML tags for documentation: How to link to data type of parameter / function?

Guido Carl8-Sep-09 1:24

Guido Carl

8-Sep-09 1:24

Hello.

We got a newbie question on XML tags for documentation (only partly referring to C#):
The text needs to use the data type of a function (or a function parameter). The documentation text goes the same for all programming languages though you have different data type namings in C#, VB.NET, C++ ... As an example, in C# and C++ you have float data type but VB names it Single.

A code example (VB here):

''' <summary>The function <cref name="myFunction"/> has the data type Single/float.</summary>
Public Function myFunction As Single()
   Return myFunction(Me.Count)
EndFunction

Can we refer to the data type naming as we do to the function name? Could be a tag like <creftype name="myFunction"/>

We use VS2008 (and Sandcastle for html help).

Thanks for hints
Guido Carl

modified on Tuesday, September 8, 2009 7:40 AM

Re: XML tags for documentation: How to link to data type of parameter / function?

N a v a n e e t h8-Sep-09 2:11

N a v a n e e t h

8-Sep-09 2:11

float is an alias for System.Single. So you can write,

/// <summary>
/// This function returns a <see cref="System.Single"/>
/// </summary>
public float MyFunction()
{
    // your code
}

Navaneeth

How to use google | Ask smart questions

Re: XML tags for documentation: How to link to data type of parameter / function?

Guido Carl8-Sep-09 2:19

Guido Carl

8-Sep-09 2:19

Thanks. So easy if you know about it.

Guido

Context menu or Context menu with Icons

rizwan.saddal8-Sep-09 1:02

rizwan.saddal

8-Sep-09 1:02

Hi everyone there, I searched alot but didnt get any source to find out how I can add Icons or images on the left side of my context menu or context menu strip. Any urgent reply will be appreciated.
Regards

Re: Context menu or Context menu with Icons

DaveyM698-Sep-09 1:11

DaveyM69

8-Sep-09 1:11

Every ToolStripMenuItem you add to your context menu has an Image property.

Dave

Generic BackgroundWorker - My latest article!
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Why are you using VB6? Do you hate yourself? (Christian Graus)

iphone style scrolling

benams8-Sep-09 0:47

benams

8-Sep-09 0:47

I want to make an iphone style scrolling. I tryed to set the scroll position(in a loop) on mouse click but my application is flickering when doing that.
can anybody explain/solve my problem?

Re: iphone style scrolling

Alan Balkany8-Sep-09 4:23

Alan Balkany

8-Sep-09 4:23

Often, setting the DoubleBuffer style of your Form or Panel will solve the flickering problem:

this.SetStyle (ControlStyles.DoubleBuffer, true);

WinForm Opacity - BeginDrag / EndDrag

Programm3r8-Sep-09 0:19

Programm3r

8-Sep-09 0:19

Hi all,

I am trying to change the opacity of the Form while dragging it around. Basically it must set the opacity value to 0.5 when the drag begin and when it stop it must set it back to 1.0. The thing is I have overridden alot of method trying to accomplish this, without success? Confused | :confused:

Can anyone please help?
Many thanks in advance
Kind regards,

The only programmers that are better C# programmers, are those who look like this -> Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: WinForm Opacity - BeginDrag / EndDrag

Programm3r8-Sep-09 0:52

Programm3r

8-Sep-09 0:52

Something like this works:

private const int WM_ENTERSIZEMOVE = 0x0231;
private const int WM_EXITSIZEMOVE = 0x0232;

protected override void WndProc(ref Message m)
{
    base.WndProc(ref m);

    switch (m.Msg)
    {
        case WM_ENTERSIZEMOVE:
            this.Opacity = 0.5;
            break;
        case WM_EXITSIZEMOVE:
            this.Opacity = 1.0;
            break;
    }

    this.Invalidate();
}

Still trying to get rid of the small flicker....

The only programmers that are better C# programmers, are those who look like this -> Green Alien | [Alien]

Programm3r
My Blog: ^_^

how to insert color in the row of the richtextbox contorol

amir-haghighi7-Sep-09 23:08

amir-haghighi

7-Sep-09 23:08

Hi . plz see the this image::

Click here[^]

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