Author: admin

Angular 4 Deployment

by

September 12, 2017

10:09 am

2,347 Comments on Angular 4 Deployment

Angular JS

Use any of the commands:

  1. ng build
  2. ng build –prod
  3. ng build –prod –base-href /directory-name/sub-directory-name/

Create testing branch on github

  1. add normal git repository
  2. git branch gh-pages
  3. git push -u origin gh-pages

To push on the git repository

  1. git init
  2. git add origin
  3. git add .
  4. git commit -m “Initial Commit”
  5. git push -u origin master
  6. ng build –prod –base-href https://whateveruser.github.io/whateverprojectrepo/
  7. ngh

ng build –prod –base-href https://github.com/whateveruser/whateverprojectrepo/

Ref:

  1. https://www.youtube.com/watch?v=nxV3weqMzYo

.htaccess for production site

RewriteEngine on
# Don't rewrite files or directories
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]

# Rewrite everything else to index.html to allow html5 state links
RewriteRule ^ index.html [L]

 

OOPS

by

August 18, 2017

3:17 pm

2,301 Comments on OOPS

Java, Javascript, Php, Python

1. Rectangle Class

Design a class Rectangle
Data Members:

  • length
  • breadth

Member Functions:

  • setDimension()
  • area()
  • perimeter()

2. Worker Class

Design a class Worker
Data Members:

  • wages
  • working_days

Member Functions:

  • setData()
  • payment()

3. Box Class

Design a class Box
Data Members:

  • length
  • breadth
  • height

Member Functions:

  • setDimension()
  • volume()

4. Student Class

Design a class Student
Data Members:

  • roll_number
  • name

Member Functions:

  • setData()
  • getData()

5. Account Class

Design a class Account
Data Members:

  • balance

Member Functions:

  • deposit(amount)
  • withdraw(amount)
  • showBalance()

6. Set Class

Design a class Set that stores three numbers
Member Functions:

  • SUM()
  • MEAN()
  • MAX()
  • MIN()

7. Rectangle Class (Method Overloading – Java / C++)

Design a class Rectangle
Data Members:

  • length
  • breadth

Member Functions:

  • setDimension(int side)
  • setDimension(int length, int breadth)
  • area()
  • perimeter()

8. Box Class (Constructors – Java / C++)

Design a class Box
Data Members:

  • length
  • breadth
  • height

Constructors:

  • Box(int side)
  • Box(int length, int breadth)
  • Box(int length, int breadth, int height)

Member Function:

  • volume()

9. Account Class (Static Data Member)

Design a class Account
Data Members:

  • balance
  • interest_rate (static, default value = 10.25)

Member Function:

  • interest(no_of_years)

10. Student Class (Auto Roll Number)

Design a class Student
Data Members:

  • roll_number (auto-generated)
  • name

Member Functions:

  • getData()

Additional Requirement:

  • Keep track of the total number of students using a static variable.

11. Student Objects Using Array

Design a class Student
Data Members:

  • roll_number
  • name

Member Functions:

  • getData()
  • showData()

Task:

  • Create an array of 5 Student objects and display their details.

12. Student Class with College

Create an array of Student objects
Data Members:

  • roll_no
  • name
  • college

Member Functions:

  • readData()
  • showData()

13. Student & ClassRoom

Design:

  • Student class
  • ClassRoom class

Task:

  • Add a list of students to ClassRoom
  • Display the student list

14. Account & Bank

Design:

  • Account class
  • Bank class

Task:

  • Add a list of accounts to Bank
  • Display account details

15. Java Packages

Create two packages:

  • MyCircle
  • MyRectangle

Data Members:

  • radius (Circle)
  • length, breadth (Rectangle)

Member Functions:

  • area()
  • circumference()
  • perimeter()

16. RBI Class (Java Only)

Design a class RBI
Data Member:

  • balance

Member Functions:

  • RBI() (constructor)
  • deposit(int amount)
  • withdraw(int amount)
  • showBalance()

Array to CSV in Java

by

July 11, 2017

8:49 am

126 Comments on Array to CSV in Java

Java

 

package com.demo;

import java.io.IOException;
import com.csvreader.CsvWriter;

public class ArrayToCSVDemo {

  public static void main(String[] args) {
    
    String array[] = {"Suryanagar, Vikhroli", "Java", "SQL", "13"};
    
    try {
      
      CsvWriter writer = new CsvWriter("awesomefile.csv");
      
      writer.writeRecord(array);
      
      writer.close();
      
    } catch (IOException e) {

      e.printStackTrace();
    }
    
  }

}

Reference Link: http://www.journaldev.com/12014/opencsv-csvreader-csvwriter-example

Jar File: http://www.java2s.com/Code/Jar/j/Downloadjavacsvjar.htm

Using FileWriter class

import java.io.FileWriter;

public class TestFileWriter {

  public static String implodeString(String[] split) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < split.length; i++) {			
        sb.append(split[i]);
        if (i != split.length - 1) {
            sb.append("\",\"");
        }
    }
    return "\"" . concat(sb.toString()) .concat("\"");
  }
  
  public static void main(String[] args) {
    
    String array[] = {"Suryanagar, Vikhroli", "Java", "SQL", "13"};
    
    try {
      
      FileWriter fw = new FileWriter("testout.csv");
      //fw.write("\"Suryanagar, Vikhroli\", Java, SQL, 13");
      fw.write(implodeString(array));
      fw.close();
    } catch (Exception e) {
      System.out.println(e);
    }

    System.out.println("Success...");

  }

}

 

 

Hello World django

by

July 7, 2017

1:07 pm

2,239 Comments on Hello World django

Python

Here are simple steps to create hello world web application in python using django framework

  1. Step 1: Install virtual environment and create virtual environment for your project 
    pip install virtualenvwrapper-win

    mkvirtualenv myproject
  2. pip install virtualenv
  3. virtualenv name_to_your_env

  4. name_to_your_env\Scripts\activate
  5. After activation 

$ django-admin.py startproject HelloWorld  $ cd HelloWorld 
$ ls HelloWorld manage.py
  6. $ python manage.py runserver 
Validating models... 
0 errors found ... 
Django version 1.6.5, using settings 'HelloWorld.settings' 
Starting development server at http://127.0.0.1:8000/ 
Quit the server with CONTROL-C.
  7. $ django-admin startapp HelloWorldApp
    $ ls
    HelloWorld HelloWorldApp manage.py
  8. edit settings.py under HelloWorld project directory
    # Application definition
    INSTALLED_APPS = ( ‘django.contrib.admin’,
    ‘django.contrib.auth’,
    ‘django.contrib.contenttypes’,
    ‘django.contrib.sessions’,
    ‘django.contrib.messages’,
    ‘django.contrib.staticfiles’,
    ‘HelloWorldApp’, )
  9. modify the urls.py which is under the project directory, HelloWorld 
    from django.conf.urls import patterns, include, url 
from HelloWorldApp.views import foo 

#from django.contrib import admin 
#admin.autodiscover() 

urlpatterns = patterns('', 
# Examples: 
# url(r'^$', 'HelloWorld.views.home', name='home'), 
# url(r'^blog/', include('blog.urls')), 
#url(r'^admin/', include(admin.site.urls)), 
url(r'HelloWorldApp/$', foo), 
)
  10. modify views.py under app directory, HelloWorldApp 
    # Create your views here. 
from django.http import HttpResponse 
def foo(request): 
    return HttpResponse("Hello World!")
  11. Run the server 
    python manage.py runserver

     

  12. Hit this URL on browser
    http://localhost:8000/HelloWorldApp/

 

Ref Links:

  • https://docs.djangoproject.com/en/1.11/howto/windows/
  • http://www.bogotobogo.com/python/Django/Python_Django_hello_world.php
  • https://stackoverflow.com/questions/18684231/python-setup-command-not-found
  • https://stackoverflow.com/questions/8074955/cannot-import-name-patterns
  • https://scotch.io/tutorials/build-your-first-python-and-django-application
  • http://jinja.pocoo.org/docs/2.10/templates/

Apache POI (Poor Obfuscation Implementation File System)

by

June 22, 2017

11:38 am

1,062 Comments on Apache POI (Poor Obfuscation Implementation File System)

Java

Prerequisite
Download all poi jar files
https://poi.apache.org/download.html

  1.  Terms
    • Workbook – The file contains number of sheets
    • Sheet – Matrix contains rows and cell
    • Row – Record of an entity in one row
    • Cell – A single cell which hold value
  2. JFileChooser fileChooser = new JFileChooser();
        int returnValue = fileChooser.showDialog(null, "Select File");
        
        if(returnValue == JFileChooser.APPROVE_OPTION) {
            Workbook workbook = new HSSFWorkbook(new FileInputStream(fileChooser.getSelectedFile()));
            
            Sheet sheet = workbook.getSheetAt(0);
            
            for(Iterator<Row> rit = sheet.rowIterator(); rit.hasNext();){
                for(Iterator<Cell> cit = rit.next().cellIterator(); cit.hasNext();){
                    System.out.println(cit.next());
                }
                System.out.println("");
            }
        } else {
            System.out.println("Invalid output");
        }
  3. JFileChooser fileChooser = new JFileChooser();
        int returnValue = fileChooser.showDialog(null, "Select File");
        
        if(returnValue == JFileChooser.APPROVE_OPTION) {
            FileInputStream excelFile = new FileInputStream(fileChooser.getSelectedFile());
            Workbook workbook = new XSSFWorkbook(excelFile);
            
            Sheet sheet = workbook.getSheetAt(0);
            
            for(Iterator<Row> rit = sheet.rowIterator(); rit.hasNext();) {
                for(Iterator<Cell> cit = rit.next().cellIterator(); cit.hasNext();) {
                    System.out.print(cit.next() + "\t" + cit.next());
                }
                System.out.println("");
            }
        }
  4.  Workbook workbook = new HSSFWorkbook();
        
        Sheet sheet1 = workbook.createSheet("movies");
//        Sheet sheet2 = workbook.createSheet("Test Cases");
//        Sheet sheet3 = workbook.createSheet(WorkbookUtil.createSafeSheetName("$*(^&?"));
        
        Row row = sheet1.createRow(0);
        
//        Cell cell = row.createCell(4);
//        cell.setCellValue("Hello World");
//        Cell cell2 = row.createCell(3);
//        cell2.setCellValue("terminator");
//        System.out.println(cell.getRichStringCellValue().toString());
//        System.out.println(cell2.getRichStringCellValue().toString());

        Cell cell1 = row.createCell(0);
        Cell cell2 = row.createCell(1);
        Cell cell3 = row.createCell(2);
        Cell cell4 = row.createCell(3);
        Cell cell5 = row.createCell(4);
        
        cell1.setCellValue(5);
        cell2.setCellValue("+");
        cell3.setCellValue(6);
        cell4.setCellValue("=");
        cell5.setCellFormula("A1+C1");
        
        try {
            FileOutputStream outputStream = new FileOutputStream("test1.xlsx");
            workbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
  5.  Complete Program 
    import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Iterator;
import javax.swing.JFileChooser;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.util.WorkbookUtil;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

/**
 *
 * @author Shailesh Sonare
 */
public class ApachePOIDemo {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] shailesh) throws IOException {
        
        /*
        
        Workbook workbook = new HSSFWorkbook();
        
        Sheet sheet1 = workbook.createSheet("movies");
//        Sheet sheet2 = workbook.createSheet("Test Cases");
//        Sheet sheet3 = workbook.createSheet(WorkbookUtil.createSafeSheetName("$*(^&?"));
        
        Row row = sheet1.createRow(0);
        
//        Cell cell = row.createCell(4);
//        cell.setCellValue("Hello World");
//        Cell cell2 = row.createCell(3);
//        cell2.setCellValue("terminator");
//        System.out.println(cell.getRichStringCellValue().toString());
//        System.out.println(cell2.getRichStringCellValue().toString());

        Cell cell1 = row.createCell(0);
        Cell cell2 = row.createCell(1);
        Cell cell3 = row.createCell(2);
        Cell cell4 = row.createCell(3);
        Cell cell5 = row.createCell(4);
        
        cell1.setCellValue(5);
        cell2.setCellValue("+");
        cell3.setCellValue(6);
        cell4.setCellValue("=");
        cell5.setCellFormula("A1+C1");
        
        try {
            FileOutputStream outputStream = new FileOutputStream("test1.xlsx");
            workbook.write(outputStream);
            outputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        */
        /*
        JFileChooser fileChooser = new JFileChooser();
        int returnValue = fileChooser.showDialog(null, "Select File");
        
        if(returnValue == JFileChooser.APPROVE_OPTION) {
            Workbook workbook = new HSSFWorkbook(new FileInputStream(fileChooser.getSelectedFile()));
            
            Sheet sheet = workbook.getSheetAt(0);
            
            for(Iterator<Row> rit = sheet.rowIterator(); rit.hasNext();){
                for(Iterator<Cell> cit = rit.next().cellIterator(); cit.hasNext();){
                    System.out.println(cit.next());
                }
                System.out.println("");
            }
        } else {
            System.out.println("Invalid output");
        }
        */
        
        JFileChooser fileChooser = new JFileChooser();
        int returnValue = fileChooser.showDialog(null, "Select File");
        
        if(returnValue == JFileChooser.APPROVE_OPTION) {
            FileInputStream excelFile = new FileInputStream(fileChooser.getSelectedFile());
            Workbook workbook = new XSSFWorkbook(excelFile);
            
            Sheet sheet = workbook.getSheetAt(0);
            
            for(Iterator<Row> rit = sheet.rowIterator(); rit.hasNext();) {
                for(Iterator<Cell> cit = rit.next().cellIterator(); cit.hasNext();) {
                    System.out.print(cit.next() + "\t" + cit.next());
                }
                System.out.println("");
            }
        }
        
    }    
}

     

     

polymorphism

by

June 9, 2017

11:54 am

28 Comments on polymorphism

Java

class A {
    public void test(){
        System.out.println("hello");
    }
    
    public void foo(){
        System.out.println("fooo");
    }
}

class B extends A {
    @Override
    public void test(){
        System.out.println("world");
    }
    public void bar(){
        System.out.println("baar");
    }
}


public class PolymorphismDemo {

    public static void main(String[] args) {
        
        A a = new A();
        a.test(); // allowed: will print hello
        a.foo(); // allowed: will print fooo
        //a.bar(); // not allowed: compile time error
        
        B b = new B();
        b.test(); // allowed: will print world
        b.foo(); // allowed: will print fooo
        b.bar(); // allowed: will print baar
        
        A c = new B();
        c.test(); // allowed: will print world
        c.foo(); // allowed: will print fooo
        //c.bar(); // not allowed: compile time error
        
        //B d = new A(); // not allowed: compile time error
        
        A e = new B();
        A f = (A)e;
        f.test(); // allowed: will print world
        f.foo(); // allowed: will print fooo
        //f.bar(); // not allowed: compile time error
        
        B g = new B();
        A h = (A)g;
        h.test(); // allowed: will print world
        h.foo(); // allowed: will print fooo
        //h.bar(); // not allowed: compile time error
    }    
}

 

programs on pointers

by

June 8, 2017

2:20 pm

18 Comments on programs on pointers

C Programming

  1. WAP to exchange values of 2 variables by calling a function exchange
  2. WAP to find length of a string by calling a function lenght
  3. WAP to copy contents of one string into another by calling a function copy.
  4. WAP to reverse contents of a string
  5. WAP to find sum of 10 int values by calling a function sum (passing array as an argument)
  6. WAP to find mean of 10 in values by calling a function MEAN (passing array as an argument)
  7. WAP to dynamically read n values and find their sum
  8. WAP to read information about n students and display them
  9. WAP to find area and circumference of a circle by calling a single function circle
  10. WAP to call functions area and circumference of circle by using function pointer
  11. WAP to count total number of words in a string by calling a function wcount
  12. WAP to read a String and coutn total vowels in that string
  13. WAP to read a string and count total no of digits in that string
  14. WAP to read a string and copy it into another array
  15. WAP to rad a string and reverse that string