Web Developers Solution

Try and catch in Error Handling It is possible for a script to use multiple exceptions to check for multiple conditions. It is possible to use several if..else blocks, a switch, or nest multiple exceptions. These exceptions can use different exception classes and return different error messages: <?php class myException extends Exception {   public function errorMessage() {     $errMsg= 'Error on line '.$this->getLine().' in '.$this->getFile()     .': <b>'.$this->getMessage().'</b> is not a valid EMail address';     return $errMsg;   } } $email = "sagar@domain...com"; try {   //check if   if(filter_var($email, FILTER_VALIDATE_EMAIL) === FALSE) {     //throw exception if email is not valid     throw new myException($email);   }   //check for "example" in mail address   if(strpos($email, "example") !== FALSE) {     throw new Exception("$email is an example e-mail");  

Overloading  :-  Function overloading means you want more work or login from a function or  you can use different login in a function. You can not use same function in a class so for use this login you can use __call magic function where you can pass method name and parameter and can add login according to their parameter. Take a look on code:- class test { public function __construct() { //Your logic for constructor } public function __call($method_name , $parameter) { if($method_name == "overlodedFunction")  //Function overloading logic for function name overlodedFunction { $count = count($parameter); switch($count) { case "1": //Business log in case of overlodedFunction function has 1 argument echo "You are passing 1 argument"; break; case "2": //Incase of 2 parameter echo "You are passing 2 parameter"; break; case "3": //Incase of 2 parameter echo "You a

Fixtures in Meteor Basically in short fixtures is js file where you can set default data which will insert automatically when the app runs. Like when you created a app and you want that when you will reset your database or delete all record from database then by default some record became inserted in collection of mongodb. like you can add some data in fixtures if (user.find().count() === 0) {   user.insert({     "name": "Industria de Diseno Textil SA",     "country": "ES",     active:false   });   userinsert({     "name": "Under Armour Inc.",     "country": "US",     active:false   });   user.insert({     "name": "Nike Inc.",     "country": "US",     active:false   }); }  So as you set code in fixures that will check if user collection does not have any record then by default it will insert three record when app

How to write MongoDB find query in Meteor? Or  How to write MongoDB update query in Meteor? First of all find query  Select symbol.yahoo from user where active='true' user.find({active:true},{fields:{'symbol.yahoo':1}}); Update query in MongoDB Meteor update user set open_at=9pm and trade_date ='2012-12-20' where symbol.yahoo='meteor'  var updata = {             open_at : '9pm',             trade_date : '20122-12-30' } user.update({'symbol.yahoo':'meteor'}, {$set:updata});