Vector Demo in Java

Program for vector in java.

Below is the program.

import java.util.*;

class vectorDemo
{
    public static void main(String args[])
    {
        Vector v = new Vector(3,2);

        System.out.println("Intial Size : " + v.size());
        System.out.println("Intial Capacity : " + v.capacity());

        v.addElement(new Integer(1));
        v.addElement(new Integer(2));
        v.addElement(new Integer(3));
        v.addElement(new Integer(4));

        System.out.println("Capacity after 4 additions : " + v.capacity());
        v.addElement(new Double(4.55));
        System.out.println("Capacity after adding double element : " + v.capacity());       
    }
}

Array Keys and Array Values

Below is Simple Example which shows how the array keys or array values can be obtained from a array.


<?php

     $personinfo=array(array("name"=>"john","address"=>"pune","age"=>30),
          array("name"=>"Sathya","address"=>"Nashik","age"=>39),
          array("name"=>"madhav","address"=>"pune","age"=>22));

      $arr1=array_keys($personinfo);

      $arr2=array_values($personinfo);

       echo "OUTPUT AS ONLY KEYS FOR GIVEN ARRAY";
       echo "<br><br>";
       print_r($arr1);

      echo "<br><br>";   
      echo "OUTPUT AS ONLY VALUES FOR GIVEN ARRAY";
      echo "<br><br>";
      print_r($arr2);

?>

PHP Function to create slug from string

Here is simple Function to create slug from string.

function getSlug($title)

             {

                        $slug = preg_replace("/[^a-zA-Z0-9 ]/", "", $title);

                           $slug = str_replace(" ", "-", $slug);

                        $slug=strtolower($slug);

                        return($slug); 

  }

PHP Function to generate random unique string.

Here is a Simple Function to generate random unique string.

            function GenerateNumber($min, $max)

{

                        // Create the meta-password

                        $sMetaPassword = "";

                        global $CONFIG;

                        $ahPasswordGenerator = array(

                        "C" => array('characters' => 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ', 'minimum' => $min, 'maximum' => $max),

//"S" => array('characters' => "!@()-_=+?*^&", 'minimum' => 2, 'maximum' => 2

"N" => array('characters' => '1234567890', 'minimum' => $min, 'maximum' => $max)

);

                        foreach ($ahPasswordGenerator as $cToken => $ahPasswordSeed)

$sMetaPassword .= str_repeat($cToken, rand($ahPasswordSeed['minimum'], $ahPasswordSeed['maximum']));

                                    $sMetaPassword = str_shuffle($sMetaPassword);

                        // Create the real password

                        $arBuffer = array();

                        for ($i = 0; $i < strlen($sMetaPassword); $i ++)

$arBuffer[] = $ahPasswordGenerator[(string)$sMetaPassword[$i]]['characters'][rand(0, strlen($ahPasswordGenerator[$sMetaPassword[$i]]['characters']) - 1)];

                        return implode("", $arBuffer);

} 

PHP Function to check whether the given number is decimal or not.

Below is a simple Function to check whether the given number is decimal or not.

function check_decimal($dec_val, $decimals = 2)

{

                        $pattern = "/^[-]*[0-9][0-9]*\.[0-9]{".$decimals."}$/";

                        if (preg_match($pattern,  $dec_val))

                                    return true;

                        else

                                    return false;

}

PHP Function to check whether a given date is valid or not.

Here is a Simple Function to check whether a given date is valid or not.

           function is_valid_date($value, $separator='-')

{

              if(strlen($value) <= 10)

                        {

                        // check date

                        $arr=explode($separator,$value);

                        $day=$arr[2];

                        $month=$arr[1];

                        $year=$arr[0];

                        if(@checkdate($month, $day, $year))

                                    return true;

              }

             return false;

}

PHP Function to calculate days difference between given 2 dates.

Here is a simple  Function to calculate days difference between given 2 dates.

function daysDifference($endDate, $beginDate)

{

              //explode the date by "-" and storing to array

             $date_parts1=explode("-", $beginDate);

             $date_parts2=explode("-", $endDate);

             //gregoriantojd() Converts a Gregorian date to Julian Day Count

            $start_date=gregoriantojd($date_parts1[1], $date_parts1[2], $date_parts1[0]);

             $end_date=gregoriantojd($date_parts2[1], $date_parts2[2], $date_parts2[0]);

             return $end_date - $start_date;

}

PHP Function to convert date from mm/dd/yyyy to yyyy-mm-dd

Here is a simple Function to convert date from  mm/dd/yyyy to yyyy-mm-dd.

function convert_date($date)

{

                        if($date=='')

                        return '';

                     else

                        $dateArray=explode('/',$date);

                        return "$dateArray[2]-$dateArray[0]-$dateArray[1]";

}

PHP Function to validate an email address

Here is a simple Function to validate an email address in php.

function check_email($mail_address)

{

                        if($mail_address == '')

                        {

                                    return false;

                        }

                        else

                        {

if (preg_match("/^[0-9a-z]+(([\.\-_])[0-9a-z]+)*@[0-9a-z]+(([\.\-])[0-9a-z-]+)*\.[a-z]{2, 4}$/i",  strtolower($mail_address)))

                                    return true;

                        else

                                    return false;

                        }

}

PHP Function to get extension of a file.

Here is a simple function which returns the extension of the file.

           function getExtension($str)

{

                        $i = strrpos($str,".");

                        if (!$i) { return ""; }

                        $l = strlen($str) - $i;

                        $ext = substr($str,$i+1,$l);

                        return $ext;

}