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 $arrSam1[0] = array("a", array("2"));
 $arrSam1[1] = array("b", array("1","2", "3", "4"));
 $arrSam1[2] = array("c", array("1","2", "3"));
 
 $arrSam = usort($arrSam1, 'cmp');

 function cmp($a, $b)
 {
   return count($a[1]) > count($b[1]) ? -1 : 1;
 }

Common elements in two arrays javascript

arrNum1 = new Array(1,2,3);
arrNum2 = new Array(2,3,4,5);
arrNum3 = new Array();

arrNum3 =  intersect_safe(arrNum1, arrNum2);

for(i=0;i<arrNum3.length;i++)
 alert(arrNum3[i]);

function intersect_safe(a, b)
{
  var ai=0, bi=0;
  var result = new Array();

   while(ai<a.length && bi < b.length )
  {
     if(a[ai] != b[bi])
     { 
       bi++; 
     }
     else
     {
       result.push(a[ai]);
       ai++;
       bi++;
     }
  }

  return result;
}

  var arr = [1,2,3,4];

Method 1:

var total = 0;
$.each(arr,function() {
    total += this;
});

Method 2:

  var sum = eval(arr.join('+'));

Method 3:

  var i = arrMaxInvst.length;
  var sum = 0;
 
  while (--i) 
   sum += arrMaxInvst[i];

var arr = new Array();
arr[0] = 100;
arr[1] = 0;
arr[2] = 50;

Array.prototype.max = function() {
  return Math.max.apply(null, this)
}

Array.prototype.min = function() {
  return Math.min.apply(null, this)
}

var min = Math.min.apply(null, arr),
    max = Math.max.apply(null, arr);

To find the Maximum value in Array Use Below

 var max_of_array = Math.max.apply(Math, array);

CREATE TABLE ipaddress(id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
                       date VARCHAR(255),
                       ip VARCHAR(255));

INSERT INTO ipaddress(date, ip)
               VALUES('1-1-2012', '195.165.1.2'),
                     ('1-1-2012', '195.165.1.3'),
                     ('12-2-2012', '195.165.1.8');

Total number of Visits should be grouped based on IP Address

SELECT COUNT(ip), MONTHNAME(STR_TO_DATE(date, '%c-%e-%Y')) as period
  FROM ipaddress
 GROUP BY period;

package com.javadb2.mugil.employee;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;

import com.javadb2.mugil.db.display;
import com.mysql.jdbc.Connection;
import com.mysql.jdbc.PreparedStatement;

public class update
{	 
	public static void main(String args[])
	{
	  bean objBean = new bean();
	  objBean.setEmpId(Integer.parseInt(getInput("Enter Employee Id :")));
	  objBean.setEmpName((String)getInput("Enter Employee Name:"));
	  objBean.setEmpSalary(Integer.parseInt(getInput("Salary")));
	  updateValues(objBean);
	}
	
	public static void updateValues(bean objBean)
	{	
		System.out.println(objBean.getEmpName());
		System.out.println(objBean.getEmpSalary());
		
		String strSQL = "UPDATE employeelist" +
				"   SET empname = ? ," +
				"       salary  = ?" +
				" WHERE empid = ?";
		
		try 
		{
			Connection conn = (Connection) DriverManager.getConnection("jdbc:mysql://localhost/test", "root", "pass");
			PreparedStatement stmt = (PreparedStatement) conn.prepareStatement(strSQL);
			
			stmt.setString(1, objBean.getEmpName());
			stmt.setDouble(2, objBean.getEmpSalary());
			stmt.setInt(3, objBean.getEmpId());
			
			int affected = stmt.executeUpdate();
						
			if(affected == 1)
			{
 			  System.out.println("Updated Successfully");
			}
			else
			{
			  System.err.println("Unable to Update Employee");
			}
		} 
		catch (SQLException e) 
		{
		  e.printStackTrace();
		}
	}

	public static String getInput(String prompt)
	{
		BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
		
		System.out.print(prompt);
		System.out.flush();
		
		try 
		{
			return stdin.readLine();
		} 
		catch (Exception e) 
		{
			// TODO: handle exception
			return e.getMessage();
		}
	}
}

Database Table

 CREATE TABLE employeeList(empid int not null primary key auto_increment,
                           empname varchar(255),
                           salary  double);

Bean Class

package com.javadb2.mugil.employee;

public class bean
{
  private int  empId;
  private String  empName;
  private double  empSalary;
	
  public int getEmpId() 
  {
    return empId;
  }
	
  public void setEmpId(int empId) 
  {
    this.empId = empId;
  }
	
  public String getEmpName() 
  {
    return empName;
  }
  
  public void setEmpName(String empName) 
  {
    this.empName = empName;
  }
  
  public double getEmpSalary() 
  {
    return empSalary;
  }

  public void setEmpSalary(double empSalary) 
  {
    this.empSalary = empSalary;
  }
}

Crud Operation with Bean Class

 package com.javadb2.mugil.employee;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;

import com.javadb2.mugil.db.display;
import com.mysql.jdbc.PreparedStatement;
import com.mysql.jdbc.Statement;

public class insert
{	
  public static void main(String[] args) 
  {
    bean objBean = new bean();
		
    objBean.setEmpName(display.getInput("Enter the Employee Name"));
    objBean.setEmpSalary(Integer.parseInt(display.getInput("Enter Salary")));
		
    boolean result = getInsertedKey(objBean);
		
    if(result)
    {
      System.out.println("The Last Inserted Primary Key is "+objBean.getEmpId());			 
    }
   }
	
   public static boolean getInsertedKey(bean objBean)
   {	
     ResultSet keys = null;
		
     String strSQL = "INSERT INTO employeeList(empname, salary)VALUES(?,?)";		
		
     try 
     {
	Connection conn 	= getConnection();
	PreparedStatement stmt 	= (PreparedStatement) conn.prepareStatement(strSQL, Statement.RETURN_GENERATED_KEYS);
			
	stmt.setString(1, objBean.getEmpName());
	stmt.setDouble(2, objBean.getEmpSalary());
			
	int affected = stmt.executeUpdate();
			
	if(affected == 1)
	{
  	   keys = stmt.getGeneratedKeys();
	   keys.next();
	   int newkey = keys.getInt(1);
	   objBean.setEmpId(newkey);
	}
	else
	{
	   System.err.println("Unable to Update Values");
	   return false;
	}
      }
      catch (SQLException e) 
      {
	 processException(e);
	 System.err.println("Error in Establishing Connection");
      }
		
      return true;
  }
	
  public static Connection getConnection() throws SQLException
  {
    Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/test", "root", "pass");
    return conn;
  }
	
  public static void processException(SQLException e)
  {
     System.err.println("Error Message "+e.getMessage());
     System.err.println("Error Code"+e.getErrorCode());
     System.err.println("SQL State"+e.getSQLState());
  }
}

 public class JAVADB2
 {
   public static void main(String args[]) throws SQLException 
   {	
     try	
     {
	Connection conn = null;		
	ResultSet  rs 	= null;
	Statement  stmt	= null;
			
	String strSQL = "SELECT * FROM employee";
	conn = incDB.getConnection();
	stmt = (Statement)conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.FETCH_FORWARD);			
			
 	rs = stmt.executeQuery(strSQL);			
	display.getRecords(rs);
      } 
      catch (SQLException e) 
      {
	incDB.getException(e);
      }
    }	
}
Utility Methods
 public class incDB
{	
	private static String USER_NAME = "root";
	private static String USER_PASS = "pass";
	private static String CONN_STRING = "jdbc:mysql://localhost/test";
	
	public static Connection getConnection() throws SQLException
	{
		return DriverManager.getConnection(CONN_STRING, USER_NAME, USER_PASS);
	}
	
	public static void getException(SQLException e)
	{
		System.out.println("Message :"+e.getMessage());
		System.out.println("Error Code :"+e.getErrorCode());
		System.out.println("State : "+e.getSQLState());
	}
}

public class incDB
{	
	private static String USER_NAME = "root";
	private static String USER_PASS = "";
	private static String CONN_STRING = "jdbc:mysql://localhost/test";
	
	public static Connection getConnection() throws SQLException
	{
		return DriverManager.getConnection(CONN_STRING, USER_NAME, USER_PASS);
	}
	
	public static void getException(SQLException e)
	{
		System.out.println("Message :"+e.getMessage());
		System.out.println("Error Code :"+e.getErrorCode());
		System.out.println("State : "+e.getSQLState());
	}
}

Stored Procedure

  DROP PROCEDURE IF EXISTS getEmpDetail;
  CREATE PROCEDURE getEmpDetail(IN Salary INT)
  BEGIN   
   SELECT empid, empname, sal
     FROM employee
    WHERE sal < Salary;
  END;

Java Code

public static void main(String args[]) throws SQLException 
{	
  try	
  {
    Connection conn = null;		
    ResultSet  rs   = null;
			
    Integer salary = Integer.parseInt(display.getInput("Enter the Salary Amount"));
			
    String strSQL = "{CALL getEmpDetail(?)}";
    conn = incDB.getConnection();
    PreparedStatement stmt = (PreparedStatement) conn.prepareStatement(strSQL, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.FETCH_FORWARD);			
    
    stmt.setInt(1, salary);
    rs = stmt.executeQuery();
		
    display.getRecords(rs);
  } 
  catch (SQLException e) 
  {
    incDB.getException(e);
  }
}

Utility Function

 public class incDB
{	
	private static String USER_NAME = "root";
	private static String USER_PASS = "pass";
	private static String CONN_STRING = "jdbc:mysql://localhost/test";
	
	public static Connection getConnection() throws SQLException
	{
		return DriverManager.getConnection(CONN_STRING, USER_NAME, USER_PASS);
	}
	
	public static void getException(SQLException e)
	{
		System.out.println("Message :"+e.getMessage());
		System.out.println("Error Code :"+e.getErrorCode());
		System.out.println("State : "+e.getSQLState());
	}
}

public static void getRecords(ResultSet rs) throws SQLException 
{	
  while(rs.next())
  {
    StringBuffer buffer =  new StringBuffer();
    buffer.append("Emp Id :"+ rs.getString("empid")+ " Emp Name :"+rs.getString("empname"));
    System.out.println(buffer.toString());
  }
		
  if(rs.isBeforeFirst())
    System.out.println("Finished Printing");
 }
	
 public static String getInput(String prompt)
 {
   BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
   System.out.print(prompt);
   System.out.flush();
	
   try 
   {
     return stdin.readLine();
   } 
   catch (Exception e) 
   {
     return "Error :"+e.getMessage();
   }
  }

Stored Procedure

 DROP PROCEDURE IF EXISTS getEmpDetails;
CREATE PROCEDURE getEmpDetails(IN Salary INT, OUT total INT)
BEGIN   
   SELECT count(*) into total
    FROM employee
   WHERE sal < Salary;
  SELECT empid, empname, sal
    FROM employee
   WHERE sal < Salary;
END;

Java Code

public static void main(String args[]) throws SQLException 
{	
  try	
  {
     Connection conn = null;		
     ResultSet  rs   = null;
			
     Integer salary = Integer.parseInt(display.getInput("Enter the Salary Amount"));			
     String strSQL  = "{CALL getEmpDetails(?, ?)}";
     conn           = incDB.getConnection();
     java.sql.CallableStatement stmt = conn.prepareCall(strSQL, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.FETCH_FORWARD);			
     stmt.setInt(1, salary);
     stmt.registerOutParameter("total", Types.INTEGER);
			
     rs        = stmt.executeQuery();
     int nRows = stmt.getInt("total");
			
     System.out.println("Total no of Records :"+nRows);
     display.getRecords(rs);
  } 
  catch (SQLException e) 
  {
     incDB.getException(e);
  }
}

Utility Functions

public static void getRecords(ResultSet rs) throws SQLException 
{	
   while(rs.next())
   {
     StringBuffer buffer =  new StringBuffer();
     buffer.append("Emp Id :"+ rs.getString("empid")+ " Emp Name :"+rs.getString("empname"));
     System.out.println(buffer.toString());
   }
		
    if(rs.isBeforeFirst())
      System.out.println("Finished Printing");		
}

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