Category Archives: CS Courses

Propositional Logic : Truth Table and Contradiction

Posted on January 2, 2020 | Leave a comment

https://en.wikipedia.org/wiki/Propositional_formula

Knowledge Representation:

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Posted in Advanced Formal Modelling, Artificial Intelligence

What is this keyword in OOP

Posted on December 20, 2019 | Leave a comment

What is “this”?

You may have noticed something slightly strange in our methods. Look at this one for example:

greeting: function() { alert('Hi! I\'m ' + this.name.first + '.'); }

1	greeting: function() { alert('Hi! I\'m ' + this.name.first + '.'); }

You are probably wondering what “this” is. The this keyword refers to the current object the code is being written inside — so in this case this is equivalent to person.

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Posted in Java, Javascript, OO Analysis and Design, OOP

JavaScript OOP Paradigm Clear

Posted on December 20, 2019 | Leave a comment

https://www.freecodecamp.org/news/an-introduction-to-object-oriented-programming-in-javascript-8900124e316a/

https://developer.mozilla.org/en-US/docs/Learn/JavaScript/Objects/Basics

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Posted in Javascript, OO Analysis and Design, OOP

Touch Command in Bash

Posted on November 10, 2019 | Leave a comment

http://www.linfo.org/touch.html

As it is very new to me. I am sharing that with you all.

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Posted in Bash/Shell Scripting

OOP concept clearings from some MOOC courses

Posted on October 27, 2019 | Leave a comment

Code:

Student.java

class Student{


    //variable declaration
    int id;
    String name;
    String gender;


    //method deinitions
    boolean updateProfile(String newName){
        name=newName;
        return true;
    }



}

class Student{

//variable declaration

int id;

String name;

String gender;

//method deinitions

boolean updateProfile(String newName){

name=newName;

return true;

}

StudentTest.java

class StudentTest{


    public static void main(String[] args){


//Creating a new student object
Student s = new Student();


//setting student state


s.id =1000;
s.name="Zaki";
s.gender="male";



//3. Update your profile with correct name
s.updateProfile("John");


    }



}

class StudentTest{

public static void main(String[] args){

//Creating a new student object

Student s = new Student();

//setting student state

s.id =1000;

s.name="Zaki";

s.gender="male";

//3. Update your profile with correct name

s.updateProfile("John");

}

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Posted in Java, Java, OO Analysis and Design, OOP, Python

Started My Java Revise and Python Learning

Posted on October 27, 2019 | Leave a comment

Need to revise everything.

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Posted in Java, OOP, Programming, Python

Stored Procedures

Posted on December 14, 2017 | Leave a comment

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Posted in Database, LICT, MSSQL, Stored Procedures

SQL Identity Key ,T-SQL

Posted on December 14, 2017 | Leave a comment

How do I… Reseed a SQL Server identity column?

Microsoft SQL Server?s identity column generates sequential values for new records using a seed value. Seeding and reseeding an identity column is easy and relatively safe, if you do it correctly. Susan Sales Harkins shows you how it works.

www.techrepublic.com

Request Rejected

searchsqlserver.techtarget.com

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Posted in Database, MSSQL, SQL, T-SQL

Some Resources(Books, Links) for OOAD

Posted on October 1, 2017 | Leave a comment

https://www.quora.com/What-are-the-best-object-oriented-programming-and-design-pattern-online-courses

https://www.quora.com/Is-there-any-good-online-course-on-Object-Oriented-Analysis-and-Design

https://www.codeproject.com/Articles/1137299/Object-Oriented-Analysis-and-Design

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Posted in OO Analysis and Design, OOP

Polymorphism: Method Overloading and Method Overriding and Method Hiding

Posted on September 9, 2017 | Leave a comment

using System;
using Polymorphism;

namespace Polymorphism
{
    public static class CalCc
    {
        public static int add(int a, int b)
        {
            return a + b;
        }

        public static int add(int a, int b, int c)
        {
            return a + b + c;
        }


        public static float add(float a, float b)
        {
            return (a + b);
        }
    }
}
    

    class ProgramTest
    {
        static void Main(string[] args)
        {
        Console.WriteLine(CalCc.add(12,23));
        Console.WriteLine(CalCc.add(12,23,25));
            Console.WriteLine(CalCc.add(5.6f,7.8f));
            Console.ReadKey();
        }
    }

using System;

using Polymorphism;

namespace Polymorphism

{

public static class CalCc

{

public static int add(int a, int b)

{

return a + b;

}

public static int add(int a, int b, int c)

{

return a + b + c;

}

public static float add(float a, float b)

{

return (a + b);

}

class ProgramTest

{

static void Main(string[] args)

{

Console.WriteLine(CalCc.add(12,23));

Console.WriteLine(CalCc.add(12,23,25));

Console.WriteLine(CalCc.add(5.6f,7.8f));

Console.ReadKey();

}

using System;
using Polymorphism;

namespace Polymorphism
{
    public static class CalCc
    {
        public static int add(int a, int b)
        {
            return a + b;
        }

        public static int add(int a, int b, int c)
        {
            return a + b + c;
        }


        public static float add(float a, float b)
        {
            return (a + b);
        }
    }
}
    

    class ProgramTest
    {
        static void Main(string[] args)
        {
        Console.WriteLine(CalCc.add(12,23));
        Console.WriteLine(CalCc.add(12,23,25));
            Console.WriteLine(CalCc.add(5.6f,7.8f));
            Console.ReadKey();
        }
    }

using System;

using Polymorphism;

namespace Polymorphism

{

public static class CalCc

{

public static int add(int a, int b)

{

return a + b;

}

public static int add(int a, int b, int c)

{

return a + b + c;

}

public static float add(float a, float b)

{

return (a + b);

}

class ProgramTest

{

static void Main(string[] args)

{

Console.WriteLine(CalCc.add(12,23));

Console.WriteLine(CalCc.add(12,23,25));

Console.WriteLine(CalCc.add(5.6f,7.8f));

Console.ReadKey();

}

Method Overriding:

//override mane ektar opor arekta chore bosha
//mane ekta method er opor arekta method chore boshakei bole method overriding
//eta runtime ei hoy
//jei method tay override hoy setay override use korte hoy
//jei method tar opor override hoy seake virtual sombodhon korte hoy
//in this example we are overriding the eat method
using System;

namespace MethodOverride
{
    class Program
    {
        static void Main(string[] args)
        {
            Dog d=new Dog();
            d.eat();
            Console.ReadKey();
        }
    }

    public class Animal
    {
        public virtual void eat()
        {
            Console.WriteLine("Eating Food.");
        }
    }


    public class Dog : Animal
    {
        public override void eat()
        {
            Console.WriteLine("Eating bread");
        }
        
    }

}

//override mane ektar opor arekta chore bosha

//mane ekta method er opor arekta method chore boshakei bole method overriding

//eta runtime ei hoy

//jei method tay override hoy setay override use korte hoy

//jei method tar opor override hoy seake virtual sombodhon korte hoy

//in this example we are overriding the eat method

using System;

namespace MethodOverride

{

class Program

{

static void Main(string[] args)

{

Dog d=new Dog();

d.eat();

Console.ReadKey();

}

public class Animal

{

public virtual void eat()

{

Console.WriteLine("Eating Food.");

}

public class Dog : Animal

{

public override void eat()

{

Console.WriteLine("Eating bread");

}

another good exmple:

using System;

namespace MethodOverrideExample
{
    class Program
    {
        static void Main(string[] args)
        {
            Cars[] c = new Cars[2];
            c[0]=new newCars();
            c[1]=new oldCars();

            foreach (Cars key in c)
            {
                key.printInfo();
            }
            Console.ReadKey();

        }
    }
    
    class Cars
    {
        public virtual void printInfo()
        {
            Console.WriteLine("This is the base class");
        }
    }

    class newCars : Cars
    {
        public  override void printInfo()
        {
            Console.WriteLine("This is new cars class");
        }

    }

    class oldCars : Cars
    {

        public override void printInfo()
        {
            Console.WriteLine("This is the old cars");
        }
       
    }


}

using System;

namespace MethodOverrideExample

{

class Program

{

static void Main(string[] args)

{

Cars[] c = new Cars[2];

c[0]=new newCars();

c[1]=new oldCars();

foreach (Cars key in c)

{

key.printInfo();

}

Console.ReadKey();

}

class Cars

{

public virtual void printInfo()

{

Console.WriteLine("This is the base class");

}

class newCars : Cars

{

public override void printInfo()

{

Console.WriteLine("This is new cars class");

}

class oldCars : Cars

{

public override void printInfo()

{

Console.WriteLine("This is the old cars");

}

this video is good for learning overriding:

Method Hiding:

using System;


namespace Method_Hiding
{
    class FC
    {
        public virtual void Display()
        {
            Console.WriteLine("FC: Display");
        }
    }

    class SC : FC
    {
        public new void Display()
        {
            //base.Display();
            Console.WriteLine("SC: Display");
        }
    }

    class TC : SC
    {
        public new void Display()
        {
            //base.Display();
            Console.WriteLine("TC: Display");
        }
    }



    class Program
    {
        static void Main(string[] args)
        {
            SC p1=new SC();
            p1.Display();

            //((FC) p1).Display(); oobject casting

            FC p2=new FC();
            p2.Display();


            // SC pp = new FC(); it is not possible
            Console.ReadKey();

        }
    }
}

using System;

namespace Method_Hiding

{

class FC

{

public virtual void Display()

{

Console.WriteLine("FC: Display");

}

class SC : FC

{

public new void Display()

{

//base.Display();

Console.WriteLine("SC: Display");

}

class TC : SC

{

public new void Display()

{

//base.Display();

Console.WriteLine("TC: Display");

}

class Program

{

static void Main(string[] args)

{

SC p1=new SC();

p1.Display();

//((FC) p1).Display(); oobject casting

FC p2=new FC();

p2.Display();

// SC pp = new FC(); it is not possible

Console.ReadKey();

}

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Posted in .NET, C#, OO Analysis and Design, OOP

OOP Topics Need To Cover

Posted on July 20, 2017 | Leave a comment

https://www.javacodegeeks.com/2017/05/oops-concepts-need-know.html

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Posted in OO Analysis and Design, OOP

OOP Topics Need To Cover

Posted on July 20, 2017 | Leave a comment

https://www.javacodegeeks.com/2017/05/oops-concepts-need-know.html

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Posted in OO Analysis and Design, OOP

OOP Topics Need To Cover

Posted on July 20, 2017 | Leave a comment

https://www.javacodegeeks.com/2017/05/oops-concepts-need-know.html

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Posted in OO Analysis and Design, OOP

OOP in C#

Posted on July 14, 2017 | Leave a comment

Calculator.cs

namespace ConsoleApp6.Math

{
    public class Calculator
    {
        public int Add(int a,int b)
        {
            return a + b;
        }
    }
}

namespace ConsoleApp6.Math

{

public class Calculator

{

public int Add(int a,int b)

{

return a + b;

}

Program.cs

using ConsoleApp6.Math;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp6
{
    class Program
    {
        static void Main(string[] args)
        {
            Person john = new Person();
            john.FirstName = "John";
            john.LastName = "Smith";
            john.Introduce();

            Calculator calculator = new Calculator();
            var result = calculator.Add(1, 2);
            System.Console.WriteLine(result);
        }
    }
}

using ConsoleApp6.Math;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ConsoleApp6

{

class Program

{

static void Main(string[] args)

{

Person john = new Person();

john.FirstName = "John";

john.LastName = "Smith";

john.Introduce();

Calculator calculator = new Calculator();

var result = calculator.Add(1, 2);

System.Console.WriteLine(result);

}

Person.cs

using System;

namespace ConsoleApp6
{
    public class Person
    {
        public string FirstName;
        public string LastName;

        public void Introduce()
        {
            Console.WriteLine("My name is:"+FirstName+" "+LastName);
        }
    }
}

using System;

namespace ConsoleApp6

{

public class Person

{

public string FirstName;

public string LastName;

public void Introduce()

{

Console.WriteLine("My name is:"+FirstName+" "+LastName);

}

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Posted in C#, OOP

SOLID Concepts

Posted on June 23, 2017 | Leave a comment

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Posted in OO Analysis and Design, OOP

Category Archives: CS Courses

Propositional Logic : Truth Table and Contradiction

What is this keyword in OOP

What is “this”?

JavaScript OOP Paradigm Clear

Touch Command in Bash

OOP concept clearings from some MOOC courses

Started My Java Revise and Python Learning

Stored Procedures

SQL Identity Key ,T-SQL

Some Resources(Books, Links) for OOAD

Polymorphism: Method Overloading and Method Overriding and Method Hiding

OOP Topics Need To Cover

OOP Topics Need To Cover

OOP Topics Need To Cover

OOP in C#

SOLID Concepts

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Random Quotes

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Recent Comments

About Me & MyBlog

Caution and Tips:

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Category Archives: CS Courses

What is “this”?

Random Quote

Random Quotes

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Caution and Tips:

My Facebook

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