Dima,s Blog

Tuesday, April 8, 2014

Observer pattern

My new Observer pattern demo with a real world example https://www.youtube.com/watch?v=M_E9tw_OLCg&list=PLuXnRrIBHWJOUZALh8YXTDf2xqYSRfl9_

Friday, December 6, 2013

rpc programming in c with rpcgen linux

I started new video tutorial lesson in rpc programming. Hoe you like it.
https://www.youtube.com/watch?v=YmafTmYl5Qk
http://youtu.be/Z_VR8sxIBkY

Saturday, August 3, 2013

How to import Excel sheet to MYSQL

1. This is my Excel sheet with one table.

2. Save the Excel sheet in .csv format.

3.Open the saved file with a text editor.

4.You can see rows are separated in new lines and columns separated with commas.

5. Create mysql database and create a table with same number of columns as the Excel table.In my example, my sql table fields are username,password and type.

6.Execute this query

LOAD DATA LOCAL INFILE 'C:\\Users\\Monto\\Documents\\Book1.csv' INTO TABLE alumini.login FIELDS TERMINATED BY ',' ENCLOSED BY '"' LINES TERMINATED BY '\r\n' (usrename, password,type);

7. The result

Sunday, June 2, 2013

Simple bracket checking program (python3)

Hi, I have posted a simple bracket checking program in java. That program is based on stacks. Some other programming languages facilitates to write such a program in much easier. This post is about write such a program in python 3. Enjoy the simple syntax without object oriented classes and objects.
bracketcheck.py code :

def bracketcheck(inputstring):
    inpt=[]
    for i in range(0,len(inputstring)):
        if(inputstring[i]=='('):
            inpt.append('(')
        elif(inputstring[i]=='['):
            inpt.append('[')
        elif(inputstring[i]=='{'):
            inpt.append('{')

            
        elif(inputstring[i]==')'):
            if(len(inpt)>0):
                if(inpt.pop()=='('):
                    print("")
                else:
                    print("incompatible opening bracket for ')' at position "+str(i+1))
            else:
                print("missing the opening bracket for ')' at position "+str(i+1))

                
        elif(inputstring[i]==']'):
            if(len(inpt)>0):
                if(inpt.pop()=='['):
                    print("")
                else:
                    print("incompatible opening bracket for ']' at position "+str(i+1))
            else:
                print("missing the opening bracket for ']' at position "+str(i+1))

                
        elif(inputstring[i]=='}'):
            if(len(inpt)>0):
                if(inpt.pop()=='{'):
                    print("")
                else:
                    print("incompatible opening bracket for '}' at position "+str(i+1))
            else:
                print("missing the opening bracket for '}' at position "+str(i+1))

    if(len(inpt)>0):
        print("error")


def main():
    inputstr=input()
    bracketcheck(inputstr)

main()

The output :

Saturday, May 25, 2013

Web developing using angularjs bootstrap and php

Hi, I did an assignment given by our university. I think this will help you to understand how to use angularjs, bootstrap and php to develop dynamic web sites. I'll put the question and the answer I developed as well.

Task 03
Prepare a HTML form to get subject marks for each student (three subjects for each student) and put them into an array.
Array should be like;
Student 01 marks01 marks02 marks03
Student02 marks01 marks02 marks03
…………
Number of students is 10
Calculate the total marks for each student and save them in an array under “Total”
Calculate the average for each student and save them in the same array under “Average”
Sort the array based on the average marks
Print the results on a table including the student id/name, total, average

Answer

marks.html file

<!doctype html>  
      <html ng-app><head>  
      <link rel="stylesheet" type="text/css" href="lib/bootstrap/css/bootstrap.css">  
      <link rel="stylesheet" type="text/css" href="lib/bootstrap/css/bootstrap.min.css">  
      <link rel="stylesheet" type="text/css" href="lib/bootstrap/css/bootstrap-responsive.css">  
      <link rel="stylesheet" type="text/css" href="lib/bootstrap/css/bootstrap-responsive.min.css">  
      <script type="text/javascript" src="lib/angular.min.js"></script>  
      <script type="text/javascript" src="lib/jquery-2.0.0.min.js"></script>  
      <script type="text/javascript" src="lib/jstorage.js"></script>  
      <script type="text/javascript" src="lib/bootstrap/js/bootstrap.js"></script>  
      <script type="text/javascript" src="lib/bootstrap/js/bootstrap.min.js"></script>  
      <script type="text/javascript" src="marks.js"></script>  
 </head>  
 <body ng-controller="marks">  
      <div class="container" >  
           <div class="row">  
                <div class="span2">  
                     <ul class="nav nav-list">  
                      <li class="active"><a href="#">{{name}}</a></li>   
                      <li class="active">Dimantha M.G.T</li>   
                      <li class="active">CST</li>   
                     </ul>  
                </div>  
                <div class="span10">  
                     <form action="marks.php" method="post">  
                     <ul>  
                          <li ng-repeat="student in data" class="control-group success">  
                               <input type="text" ng-model="student.Name" name="stu[]"/><input type="text" ng-model="student.mks1" name="m1[]"/><input type="text" ng-model="student.mks2" name="m2[]"/><input type="text" ng-model="student.mks3" name="m3[]"/></li>  
                               <li class="control-group info"><input type="text" placeholder="Name" ng-model="stdName"/><input type="text"placeholder="mks1" ng-model="mrk1"/><input type="text"placeholder="mks2" ng-model="mrk2"/><input type="text"placeholder="mks3" ng-model="mrk3"/></li></li>  
                               <li><input type="button" ng-click="addStudent()" value="Add Student" class="btn btn-success"/></li><br>  
                               <li><input type="submit" value="Submit" class="btn btn-info"/></li>  
                     </ul>  
                     </form>  
                </div>  
           </div>  
      </div>  
 </body>  
 </html>

marks.js file

function marks ($scope) {
 // body...
 $scope.name="CST/10/0011";
 $scope.data=[{
  "Name":"bbw","mks1":54,"mks2":67,"mks3":71
  },{"Name":"thilina","mks1":44,"mks2":84,"mks3":90}]

 $scope.current={
  
 }

 $scope.addStudent=function(){
  //alert("bbbb")
  $scope.data.push({"Name":$scope.stdName,"mks1":$scope.mrk1,"mks2":$scope.mrk2,"mks3":$scope.mrk3})
  $scope.stdName=""
  $scope.mrk1=""
  $scope.mrk2=""
  $scope.mrk3=""
  console.log($scope.data)
 }

 $scope.submit=function(){

 }
 
 console.log($scope.data)


}

marks.php file

<html>
<head>
<link rel="stylesheet" type="text/css" href="lib/bootstrap/css/bootstrap.css">
 <link rel="stylesheet" type="text/css" href="lib/bootstrap/css/bootstrap.min.css">
 <link rel="stylesheet" type="text/css" href="lib/bootstrap/css/bootstrap-responsive.css">
 <link rel="stylesheet" type="text/css" href="lib/bootstrap/css/bootstrap-responsive.min.css">
</head>
<body>
<div class="row">
 <div class="span2">
  <ul class="nav nav-list">
   <li class="active"><a href="#">CST/10/0011</a></li> 
   <li class="active">Dimantha M.G.T</li> 
   <li class="active">CST</li> 
  </ul>
 </div>
 <div class="span10">
<?php

$name=$_POST["stu"];
$marks1=$_POST["m1"];
$marks2=$_POST["m2"];
$marks3=$_POST["m3"];


for ($i=0; $i<count($marks1); $i++){
 $tot= $marks1[$i]+$marks2[$i]+$marks3[$i];
 $av=$tot/3;
 $total[$i]=array('Total'=>$tot,'Average'=>$av);

}

//sort($total);

foreach ($total as $key => $row) {
    $t[$key]  = $row['Total'];
    $avg[$key] = $row['Average'];
 $id[$key] = $name[$key];
}

array_multisort($avg, SORT_DESC, $t, SORT_ASC,$id, SORT_ASC, $total,$name);

echo "<table class='table table-hover'>";
echo "<tr><th>Student</th><th>Average</th><th>Total Marks</th></tr>";
for ($i=0; $i<count($marks1); $i++){
 printf("<tr><td>%s</td><td>%.2f</td><td>%.2f</td></tr>",$name[$i],$total[$i]['Average'],$total[$i]['Total']);
}
echo "</table>";
?>
</div>

</div>
</body>
</html>

Download the full project with resources http://www.mediafire.com/download/73hzigoh8xxwvdb/answer.zip

Sunday, May 5, 2013

Arrange text files in a directory according to their previous folder names (C#)

This is a program that can re arrange all the text files in a directory in another directory within folders which having their previous folder names. You can try this for any file type (I did for text files).

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

namespace imagecoppy
{
    class Program
    {
        static void Main(string[] args)
        {
     

           formatDri();

            Console.ReadKey();
        }

        static void renameFiles() { 
        
        
        }

       

        static void formatDri() {
            System.IO.DirectoryInfo dif = new System.IO.DirectoryInfo(@"D:\vishwa");
            System.IO.DirectoryInfo[] subdif  = dif.GetDirectories();
            System.IO.DirectoryInfo txtdir = dif.CreateSubdirectory("TEXTFILES");
            System.IO.FileInfo[] dirname;
            foreach (System.IO.DirectoryInfo sub in subdif) {
           
               
                dirname = sub.GetFiles("*.txt*");
                if (dirname.Length != 0)
                {
                    txtdir.CreateSubdirectory(sub.Name);
                    foreach (System.IO.FileInfo txtfile in dirname)
                    {
                       
                        txtfile.CopyTo(@"D:\vishwa\TEXTFILES\" + sub.Name + "\\" + txtfile.Name, false);
                    }
            }

            System.IO.FileInfo[] txtInfo=dif.GetFiles("*.txt*");
            // this part is same as the previous post 
           
            
            }
        
        }
    }
}

Saturday, May 4, 2013

Write a program to organize files in a folder (C#)

Hi, This is a program to organize files in a folder by type. You can do this for file size ,last access time or any other attribute as your wish. This program select a specific type of files among all files in a folder and create a sub folder for the type and copy all the files of that type to the created folder. Try this.

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

namespace imagecoppy
{
    class Program
    {
        static void Main(string[] args)
        {
            System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(@"C:\Users\Monto\Pictures");
            di.CreateSubdirectory("JPJs");

            System.IO.FileInfo[] fileNames = di.GetFiles("*.png*");
            foreach (System.IO.FileInfo fi in fileNames)
            {
                Console.WriteLine("{0}: {1}: {2}", fi.Name, fi.LastAccessTime, fi.Length);
                fi.CopyTo(@"C:\Users\Monto\Pictures\JPJs\"+fi.Name,false);
            }

            Console.ReadKey();
        }
    }
}

Look at some java codes of parallel programs http://tjisblogging.blogspot.com/