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snipts » class 
showing 1-20 of 24 snipts for class
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∞ get the index of the first occurrence of an object by class (using a block)
/* * Some references: * http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/Blocks/Articles/00_Introduction.html * http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/NSArray.html#//apple_ref/occ/instm/NSArray/indexOfObjectPassingTest: * */ /* Predeclare a block */ BOOL (^IsSameClass)(id, NSUInteger, BOOL *) = ^(id element, NSUInteger idx, BOOL * stop) { *stop = [element isKindOfClass:UITabBar.class]; return *stop; }; NSUInteger index = [myNSArray indexOfObjectPassingTest:IsSameClass]; /* Using a block literal */ NSUInteger index = [myNSArray indexOfObjectPassingTest:^(id element, NSUInteger idx, BOOL * stop){ *stop = [element isKindOfClass:UITabBar.class]; return *stop; }];
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∞ get the first occurrence of an object of a specific class
/* * Some references: * http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/ObjectiveC/Articles/ocFastEnumeration.html * http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/ObjectiveC/Articles/ocCategories.html#//apple_ref/doc/uid/TP30001163-CH20-SW1 * http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Protocols/NSObject_Protocol/Reference/NSObject.html#//apple_ref/occ/intfm/NSObject/isKindOfClass: * */ /* NSArray+Additions.h */ @interface NSArray (Additions) - (id)objectOfClass:(Class)aClass; @end /* NSArray+Additions.m */ #import "NSArray+Additions.h" @implementation NSArray (Additions) - (id)objectOfClass:(Class)aClass { for (id element in self) { if ([element isKindOfClass:aClass]) { return (element); } } return (nil); } @end
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∞ get the index of the first occurrence of an object by class
/* * Some references: * http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/ObjectiveC/Articles/ocFastEnumeration.html * http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/ObjectiveC/Articles/ocCategories.html#//apple_ref/doc/uid/TP30001163-CH20-SW1 * http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Protocols/NSObject_Protocol/Reference/NSObject.html#//apple_ref/occ/intfm/NSObject/isKindOfClass: * http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/NSArray.html#//apple_ref/occ/instm/NSArray/indexOfObject: * */ /* NSArray+Additions.h */ @interface NSArray (Additions) - (NSInteger)indexOfObjectByClass:(Class)aClass; @end /* NSArray+Additions.m */ #import "NSArray+Additions.h" @implementation NSArray (Additions) - (NSInteger)indexOfObjectByClass:(Class)aClass { for (id element in self) { if ([element isKindOfClass:aClass]) { return ([self indexOfObject:element]); } } return (-1); } @end
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∞ bank.cpp
#include <string> using namespace std; #include "bankAccount.h" string bank::getName() { return name; } double bank::getBalance() { return balance; ) void bank::setBalance(double balancePassed) { balance=balancePassed; } double bank::getOverdraft() { return overdraft; } void bank::setOverdraft(double overdraftPassed) { overdraft=overdraftPassed; } int bank::getState(); { return state; } void bank::setState(int statePassed) { state=statePassed; } int bank::Withdraw(string namePassed, double ) { return
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∞ bank.h
#ifndef BANKHEADER_H_INCLUDED #define BANKHEADER_H_INCLUDED class bank { public: string getName(); double getBalance(); void setBalance(double); double getOverdraft(); void setOverdraft(double); int getState(); void setState(int); int Withdraw(string, double); int TransferTo(string, double) private: string name; double balance double overdraft; int state; #endif // BANKHEADER_H_INCLUDED
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∞ cat home
#include <iostream> #include <string> using namespace std; class cat //start a class called cat { public: //public variables string catName; string catColor; int catTag; void set(int temp, string temp2); //function that is used to assign data into private void print(); //function that is used to print out data private: //private variables int catTel; string catAdd; }; void cat::set(int temp, string temp2) //function used to assign data into private { catTel=temp; //stores first variable into catTel catAdd=temp2; //stores second variable into catAdd } void cat::print() //function used to print out data { cout<<"Cat's name: "<<catName<<endl; cout<<"Cat's color: "<<catColor<<endl; cout<<"Cat's tag: "<<catTag<<endl; cout<<"Cat's owner number: "<<catTel<<endl; cout<<"Cat's address: "<<catAdd<<endl<<endl; } int main() { cat c1; // create object c1 in class cat cat c2; //create object c2 in class cat cout<<"Welcome to MX's cat home, lol"<<endl<<"============================="<<endl; c1.catName="Cat1"; //input data c1.catColor="Blue"; //^ c1.catTag=123; //^ c2.catName="Cat2"; //^ c2.catColor="Purple"; //^ c2.catTag=124; //^ c1.set(5678, "Land1"); //pass private data through function set so that they can be stored in private c2.set(9123, "Land2"); //^ c1.print(); //print out data c2.print(); //^ return 0; }
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∞ AS3 Class File
package { import flash.display.MovieClip; public class MyClass extends MovieClip { public function MyClass() { } } }
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∞ Lazy Registry Class
<?php /** * LRegistry Class * * Managing globals with the registry pattern. * This class provides lazy loading functionallity. This means it is possible to * add a callback or class (with arguments) which will be called or instanciated * when it is being used for the first time. * * @version 1.0 * @author Victor Villaverde Laan * @link http://www.freelancephp.net/php-lazy-registry-class/ * @license MIT license */ class LRegistry { /** * Singleton pattern * @var Registry object */ private static $_instance = NULL; /** * Containing all entries * @var array */ private $_entries = array(); /** * Default overwrite entries when being set more than once * @var boolean */ private $_default_overwrite = TRUE; /** * Private contructer for singleton protection */ private final function __construct() { } /** * Private clone method for singleton protection */ private final function __clone() { } /** * Get instance of this class * @return Registry object */ public static function get_instance() { if ( self::$_instance === NULL ) self::$_instance = new LRegistry; return self::$_instance; } /** * Get value of given key * @param string $key * @param boolean $reload reload if class or callback was already loaded * @return mixed */ public static function get( $key, $reload = FALSE ) { $instance = self::get_instance(); // check if entry exists if ( ! key_exists( $key, $instance->_entries ) ) $instance->_exception( 'Key "' . $key . '" could not be found.' ); // get current entry $entry = $instance->_entries[$key]; // check if entry should be loaded or reloaded if ( ! $entry['loaded'] OR $reload ) { if ( $entry['type'] == 'class' ) { // get reflection class $ref_class = new ReflectionClass( $entry['class'] ); // create instance $entry['value'] = $ref_class->newInstanceArgs( $entry['args'] ); } else if ( $entry['type'] == 'callback' ) { // run callback and set return value $entry['value'] = call_user_func_array( $entry['callback'], $entry['args'] ); } else { $instance->_exception( 'Type "' . $type . '" is not supported.' ); } // set (new) value and change "loaded" setting $instance->_entries[$key]['value'] = $entry['value']; $instance->_entries[$key]['loaded'] = TRUE; } return $entry['value']; } /** * Set value of given key * @param string $key * @param mixed $value * @param boolean $overwrite optional, when set will ignore the default overwrite setting * @return boolean value was set succesfully */ public static function set( $key, $value, $overwrite = NULL ) { // set normal value settings $settings = array( 'type' => 'value', 'loaded' => TRUE, 'value' => $value ); return self::get_instance()->_set( $key, $settings, $overwrite ); } /** * Set lazy entry of a class. Instance will only be created when entry * is requested using the get method. * @param string $key * @param string $class * @param array $args * @param boolean $overwrite optional, when set will ignore the default overwrite setting * @return boolean value was set succesfully */ public static function set_lazy_class( $key, $class, $args = array(), $overwrite = NULL ) { // set lazy class settings $settings = array( 'type' => 'class', 'class' => $class, 'args' => $args, 'loaded' => FALSE, 'value' => NULL ); return self::get_instance()->_set( $key, $settings, $overwrite ); } /** * Set lazy entry of a callback function.Function will only be called when entry * is requested using the get method. * @param string $key * @param array $callback * @param array $args * @param boolean $overwrite optional, when set will ignore the default overwrite setting * @return boolean value was set succesfully */ public static function set_lazy_callback( $key, $callback, $args = array(), $overwrite = NULL ) { // set lazy callback settings $settings = array( 'type' => 'callback', 'callback' => $callback, 'args' => $args, 'loaded' => FALSE, 'value' => NULL ); return self::get_instance()->_set( $key, $settings, $overwrite ); } /** * Check if given entry exists * @param string $key * @return boolean */ public static function has( $key ) { return key_exists( $key, self::get_instance()->_entries ); } /** * Check if given (lazy) entry is already loaded * @param string $key * @return boolean */ public static function is_loaded( $key ) { return ( self::has( $key ) AND self::get_instance()->_entries[$key]['loaded'] === TRUE ); } /** * Remove the given entry * @param string $key */ public static function remove( $key ) { if ( ! self::has( $key ) ) self::get_instance()->_exception( 'Key "' . $key . '"does not exist.' ); unset( self::get_instance()->_entries[$key] ); } /** * Set default overwriting entries when being set more than once. * @param boolean|NULL $overwrite optional, if empty can be used as a getter * @return boolean */ public static function default_overwrite( $overwrite = NULL ) { if ( $overwrite !== NULL ) self::get_instance()->_default_overwrite = (bool) $overwrite; return self::get_instance()->_default_overwrite; } /** * Set value of given key (private use) * @param string $key * @param mixed $settings * @param boolean $overwrite optional, when set will ignore the default overwrite setting * @return boolean value was set succesfully */ protected function _set( $key, $settings, $overwrite = NULL ) { $instance = self::get_instance(); // check if overwriting is allowed $overwrite = ( $overwrite === NULL ) ? $this->_default_overwrite : $overwrite; // check if entry exists and overwriting is allowed if ( key_exists( $key, $this->_entries ) AND ! $overwrite ) return FALSE; $this->_entries[$key] = $settings; return TRUE; } /** * Throw an exception * @param string $message */ protected function _exception( $message ) { throw new Exception( 'LRegistry: ' . $message ); } } /*?> // ommit closing tag, to prevent unwanted whitespace at the end of the parts generated by the included files */
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∞ Return a class is a certain page template is used
<?php function page_template_class() { $page_template_class = ''; if (is_page_template('kinderen.php')) { $page_template_class = 'kinderen'; } if (!empty($page_template_class)) { echo ' class="'.$page_template_class.'"'; } else { return false; } } ?>
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∞ PHP class template
<?php /** * @author 1:Carlos Pires} * @copyright Copyright (c) 2010, 2:2km interativa!} */ class ${3:nome da classe} { $end } ?>
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∞ showing different python classes types
class A(object): def foo(self,x): print "executing foo(%s, %s)" % (self, x) @classmethod def class_foo(cls, x): print "executing class_foo(%s, %s)" % (cls, x) #@staticmethod def static_foo(x): print "executing static_foo(%s)" % x A.class_foo(1) A.static_foo(1) A.class_foo(2) A.static_foo(2) a=A() a.foo(1) a.class_foo(1) a.static_foo(1)
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∞ string class
#include <iostream> using namespace std; int main() { string str1="Singapore Polytechnic is the oldest polytechnic."; cout<<str1<<endl; cout<<str1.find("o",20)<<endl<<endl; //use of find str1.replace(29,6,"coolest"); //use of replace //str1.erase(29,6); //use of erase //str1.insert(29,"coolest"); cout<<str1<<endl; return 0; }
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∞ bankaccount
//This is Account.h #include <string> #include <iostream> using namespace std; class Account { public: Account(); Account(char* Name); ~Account(); string getName(); void setName(string Name); double getBalance(); void setBalance(double Balance); double getOverdraft(); void setOverdraft(double Overdraft); int withdraw(double amount); int transferTo(Account* acc,double amount); void deposit(double amount); double calcInterest(double rate, int year); void state(void); private: string name; double balance; double overdraft; }; //This is Account.cpp #include "Account.h" using namespace std; Account :: Account() { balance = 0; overdraft = 0; name = ""; } Account :: Account(char* Name) { balance = 0; overdraft = 0; name = Name; } Account :: ~Account() { } string Account :: getName() { return name; } void Account :: setName(string Name) { name = Name; } double Account :: getBalance() { return balance; } void Account :: setBalance(double Balance) { balance = Balance; } double Account :: getOverdraft() { return overdraft; } void Account :: setOverdraft(double Overdraft) { overdraft = Overdraft; } int Account :: withdraw(double amount) { if (amount < (balance + overdraft)) { balance -= amount; return 1; } return 0; } int Account :: transferTo(Account* acc, double amount) { if (withdraw(amount)) { acc->deposit(amount); return 1; } return 0; } void Account ::deposit(double amount) { balance += amount; } double Account :: calcInterest(double rate, int year) { double interest = 0.0; if (balance > 0.0) { interest = balance * rate * year; } return interest; } void Account :: state() { cout<<endl; cout<<"Name : "<<getName()<<endl; cout<<"Balance : "<<getBalance()<<endl; cout<<"Overdraft : "<<getOverdraft()<<endl; } //This is main.cpp #include <iostream> #include <string> #include "Account.h" using namespace std; int main() { Account* acc1 = new Account("TestName1"); Account* acc2 = new Account("TestName2"); double rate = 0.05; int yr = 1; double interest; int choice; char Name[128]; double amt; do { cout<<"1 : Set Name for account 1"<<endl; cout<<"2 : Set Name for account 2"<<endl; cout<<"3 : Set Overdraft limit for account 1"<<endl; cout<<"4 : Set Overdraft limit for account 2"<<endl; cout<<"5 : Deposit money into account 1"<<endl; cout<<"6 : Deposit money into account 2"<<endl; cout<<"7 : Withdraw money from account 1"<<endl; cout<<"8 : Withdraw money from account 2"<<endl; cout<<"9 : Transfer money from account 1 to account 2"<<endl; cout<<"10 : Transfer money from account 2 to account 1"<<endl; cout<<"11 : Print out interest of account 1"<<endl; cout<<"12 : Print out interest of account 2"<<endl; cout<<"13 : Print cout the statement for account 1"<<endl; cout<<"14 : Print cout the statement for account 2"<<endl; cout<<"0 : Quit"<<endl; cout<<endl<<"Enter choice : "; cin>>choice; cout<<endl; switch(choice) { case 1: cout<<"Enter name for account 1"<<endl; cin>>Name; acc1->setName(Name); break; case 2: cout<<"Enter name for account 2"<<endl; cin>>Name; acc2->setName(Name); break; case 3: cout<<"Set Overdraft for account 1"<<endl; cin>>amt; acc1->setOverdraft(amt); break; case 4: cout<<"Set Overdraft for account 2"<<endl; cin>>amt; acc2->setOverdraft(amt); break; case 5: cout<<"Enter the amount to deposit for account 1"<<endl; cin>>amt; acc1->deposit(amt); break; case 6: cout<<"Enter the amount to deposit for account 2"<<endl; cin>>amt; acc2->deposit(amt); break; case 7: cout<<"Enter the amount to withdraw for account 1"<<endl; cin>>amt; if (acc1->withdraw(amt)) { cout<<"Withdraw succesfully for account 1"<<endl; } else { cout<<"Not enough cash for withdrawal"<<endl; } break; case 8: cout<<"Enter the amount to withdraw for account 2"<<endl; cin>>amt; if (acc2->withdraw(amt)) { cout<<"Withdraw succesfully for account 2"<<endl; } else { cout<<"Not enough cash for withdrawal"<<endl; } break; case 9: cout<<"Enter the amount to tranfer from account 1 to account 2"<<endl; cin>>amt; if (acc1->transferTo(acc2, amt)) { cout<<"Transfer succesfully to account 2"<<endl; } else { cout<<"Not enough cash for transfering"<<endl; } break; case 10: cout<<"Enter the amount to tranfer from account 2 to account 1"<<endl; cin>>amt; if (acc2->transferTo(acc1, amt)) { cout<<"Transfer succesfully to account 1"<<endl; } else { cout<<"Not enough cash for transfering"<<endl; } break; case 11: cout << "The interest of account 1: "; interest = acc1->calcInterest(rate, yr); cout << interest<<endl; break; case 12: cout << "The interest of account 2: "; interest = acc2->calcInterest(rate, yr); cout << interest<<endl; break; case 13: acc1->state(); break; case 14: acc2->state(); break; default: if(choice!=0) cout << "You enter wrong choice. Please re-enter choice again."<<endl; break; } cout<<endl<<endl; } while (choice != 0); return 0; }
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∞ class-object
#include <iostream> #include <string> using namespace std; class Doggy { char doggyName[80]; char doggyType[80]; char doggyOwner[40]; int dogTag; public: int gettel(int telnum, int Telnum); void settel(int telnum, int Telnum); char getAddress(char Address, char address); void setAddress(char Address, char address); void store(char * name, char * type, char * owner, int num); void show(); void showadd_tel(); void store1(int tel, char *add); private: int telnum; char address[100]; };//semi col to mark End Of class dec int Doggy :: gettel(int telnum, int Telnum) { return telnum; } void Doggy :: settel(int telnum, int Telnum) { Telnum = telnum; } char Doggy :: getAddress(char Address, char address) { return address; } void Doggy :: setAddress(char Address, char address) { Address = address; } //:: is the binary scope, eg the fuction belong to which class void Doggy::store(char * name, char * type, char * owner, int num) { strcpy(doggyName, name); strcpy(doggyType, type); strcpy(doggyOwner, owner); dogTag = num; } void Doggy::show() { cout << "dog's Name: " << doggyName << endl; cout << "dog's Type: " << doggyType << endl; cout << "dog's Owner: " << doggyOwner << endl; cout << "dog tag number: " << dogTag << endl; } void Doggy :: showadd_tel() { cout << "telephone no.: " << telnum << endl; cout << "address: " << address << endl; } void Doggy :: store1(int tel, char *add) { telnum = tel; strcpy(address, add); } int main() { //create 3 new dog object Doggy d1; Doggy d2; Doggy d3; Doggy at1; Doggy at2; Doggy at3; cout << "Welcome to my Dog Kennel" << endl; d1.store("dipsy", "Maltest","Alice", 1001); d2.store("lala", "Dobberman","Bob", 1002); d3.store("tinki", "Collie","Malory", 1003); at1.store1(123, "woodlands"); at2.store1(234, "bugis"); at3.store1(345, "amk"); d1.show(); at1.showadd_tel(); cout << endl; d2.show(); at2.showadd_tel(); cout << endl; d3.show(); at3.showadd_tel(); cout << endl; return 0; }
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∞ class initialiser
+ (void) initialize { if (self == [ClassName class]) { /** * initialize class properties */ } }
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∞ Database Helper Class with Cache
<?php class Database { public $db = array( 'host'=>DB_HOST, 'user'=>DB_USER, 'pswd'=>DB_PSWD, 'db'=>DB_DB, 'status'=>true ); public $caching = array( 'on'=>false, 'time'=>'', 'cache_path'=>'/db_query_cache/' ); public $tbl; private $queryCount = 0; function __construct($wtbl='') { if(@mysql_connect($this->db['host'],$this->db['user'],$this->db['pswd'])) { mysql_select_db($this->db['db']); $this->tbl = $wtbl; } else { $this->db['status'] = false; } } function tbl($tbl) { $this->tbl = $tbl; return $this; } function cache($cache_time=3600) { // Tell the code to cache the query // It will be set to false after the query execution $this->caching['on'] = true; $this->caching['time'] = $cache_time; return $this; } function cacheActions($query) { $this->caching['on'] = false; $cache_file = realpath('.').$this->caching['cache_path'].md5($query).'.txt'; if(file_exists($cache_file)) { // If the cache exists, lets see if we must delete it if((time()-filemtime($cache_file))>=$this->caching['time']) { unlink($cache_file); // Creating a new one with the results $results = $this->cache_query($query); file_put_contents($cache_file,serialize($results)); // Returning the results return $results; } else { // If we're not deleting it, we're using it return unserialize(file_get_contents($cache_file)); } } else { // Creating a new one with the results $results = $this->cache_query($query); file_put_contents($cache_file,serialize($results)); // Return the results return $results; } } function cache_query($query) { $result = mysql_query($query); $results = array(); while($row = mysql_fetch_assoc($result)) { $results[] = $row; } return $results; } function find($arg='',$params=array()) { ++$this->queryCount; // If we don't have a table, return false; if($this->tbl=='') return false; // If we didn't specify the fields, get all. $fields = (isset($params['fields'])) ? $params['fields'] : '*'; if(is_integer($arg)||ereg('^[0-9]+$',$arg)) { // If is integer or a numeric string, look for a result by its ID return mysql_fetch_assoc(mysql_query('select '.$fields.' from '.$this->tbl." where id='$arg'")); } else { // If isn't a integer, select all row with $params parameters or not. $query_params = ''; if(is_array($params)) { // The query's params var // Handle each one of $params options $query_params .= (isset($params['where'])&&strlen($params['where'])>1) ? ' where '.$params['where'] : ''; $query_params .= (isset($params['group'])) ? ' group by'.$params['group'] : ''; $query_params .= (isset($params['order'])) ? ' order by '.$params['order'] : ''; $query_params .= (isset($params['limit'])) ? ' limit '.((isset($params['offset'])) ? $params['offset'].',' : '').$params['limit'] : ''; } $query = 'select '.$fields.' from '.$this->tbl.$query_params; if($this->caching['on']) { return $this->cacheActions($query); } else { $result = mysql_query($query); $results = array(); while($row = mysql_fetch_assoc($result)) { $results[] = $row; } return $results; } } } function query($query) { $result = mysql_query($query); $results = array(); while($row = mysql_fetch_assoc($result)) { $results[] = $row; } return $results; } function add($args) { $args = func_get_args(); $values = array(); foreach($args as $value) { $values[] = "'".$this->escp($value)."'"; } return mysql_query('insert into '.$this->tbl.' values('.join(',',$values).')'); } function update($fields='',$condition) { if(!is_array($fields)||$this->tbl=='') return false; $values = array(); foreach($fields as $field=>$value) { $values[] = $field."='".mysql_real_escape_string($value)."'"; } $values = join(',',$values); return mysql_query('update '.$this->tbl.' set '.$values.' where '.$condition); } function del($conditions='') { if($this->tbl=='') return false; $conditions = ($conditions!='') ? ' where '.$conditions : ''; return mysql_query('delete from '.$this->tbl.$conditions); } function escp($what) { return mysql_real_escape_string($what); } function get_increment($table='') { $table = ($this->tbl=='') ? $table : $this->tbl; if($table=='') return false; $query = mysql_fetch_assoc(mysql_query('show table status from '.$this->db['db']." where name='$table'")); return $query['Auto_increment']; } function ar($is_update=false) { if(!$is_update) { return mysql_affected_rows(); } else { $ar = (preg_match('/Rows matched: ([0-9]+)/',mysql_info(),$matches)) ? $matches[1] : 0; return $ar; } } } ?>
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∞ JavaScript adds classes to BODY based on URL
function setBodyClass() { var url = new String(window.location.pathname), dirs = url.split('/'), classes = ' home'; if (dirs) { classes = ''; for (i = 0; i < dirs.length; i++) { var dir = dirs[i].split('.'); // removes file extentions if (dir[0]) { classes += ' '; classes += dir[0].toLowerCase(); } } } // check if body has an existing class if (!document.body.className) { document.body.className = classes; } else { var newClassName = document.body.className; newClassName += classes; document.body.className = newClassName; } }
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∞ Session Helper class
<?php // Example of usage below the code class Session { // To permit the same session var being accessed // more than once at same time on different places. var $prefix; function Session() { session_start(); $this->prefix = $_SERVER['HTTP_HOST']; if($this->get('flash')) { foreach($_SESSION[$this->prefix]['flash'] as $name=>$vals) { ++$_SESSION[$this->prefix]['flash'][$name]['counter']; if($_SESSION[$this->prefix]['flash'][$name]['counter']>1) { unset($_SESSION[$this->prefix]['flash'][$name]); } } } } function get($session_var) { return ((isset($_SESSION[$this->prefix][$session_var])) ? $_SESSION[$this->prefix][$session_var] : false); } function get_cookie($cookie_name) { return ((isset($_COOKIE[$cookie_name])) ? $_COOKIE[$cookie_name] : false); } function set($session_var,$value) { $_SESSION[$this->prefix][$session_var] = $value; } function set_cookie($cookie_name,$value) { setcookie($cookie_name,$value,time()+3600*24,'/'); } function del() { $session_vars = func_get_args(); foreach($session_vars as $session_var) { if($this->get($session_var)||is_array($this->get($session_var))) { unset($_SESSION[$this->prefix][$session_var]); } } } function del_cookie() { $cookies = func_get_args(); foreach($cookies as $cookie) { if($this->get_cookie($cookie)) { setcookie($cookie,'del',time()-3600,'/'); } } } function flash($flash_var,$value) { $_SESSION[$this->prefix]['flash'][$flash_var] = array('val'=>$value,'counter'=>0); } function get_flash($flash_var) { return ((isset($_SESSION[$this->prefix]['flash'][$flash_var]['val'])) ? $_SESSION[$this->prefix]['flash'][$flash_var]['val'] : false); } } // USAGE EXAMPLES // First, obviously, we must instanciate the class // I like to name my var $Session, but it could be shorter like $S. $Session = new Session(); // Performing basic $_SESSION operations: // Setting a $_SESSION var $Session->set('varname','value'); // It's the same as $_SESSION['varname'] = 'value' // Retrieving a $_SESSION var's value $Session->get('varname'); // Deleting a $_SESSION var // Accept multiple arguments $Session->del('varname','varname2','varname3'); // Now, about the function FLASH // It sets a $_SESSION var that will last only the next HTTP request // It's useful to define error messages for forms // Example: we have a page form.php and process.php where this last // will manipulate data sended by form.php // PROCESS.PHP if($_POST['name']=="") { $Session->flash('error','Sorry, you must enter a name'); header('location: form.php'); } // FORM.PHP if($Session->get_flash('error')) { echo $Session->get_flash('error'); // This would display "Sorry, you must enter a name" } // About the COOKIES funcions: // They works like the session functions, changing only its names: set_cookie() and del_cookie()(this one accept multiple args as well) ?>
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∞ Database Helper class
<?php // Examples of how to use below, after the class code. class Database { var $QueryCount = 0; function Database() { mysql_connect(DB_HOST,DB_USER,DB_PSWD); mysql_select_db(DB_DB); } function query($query) { ++$this->QueryCount; return mysql_query($query); } function select($table,$data='',$addOn='') { ++$this->QueryCount; $data = ($data=='') ? '*' : $data; return mysql_query("select $data from $table $addOn"); } function insert($table,$where,$data,$debug=false) { $data = (!preg_match('/^\'[^\']*\'/',$data)) ? "'".$data."'": $data; if($debug==false) { return mysql_query("insert into ".$table.$where." values($data)"); } else { echo "insert into ".$table.$where." values($data)"; } } function update($table,$what,$where) { return mysql_query("update $table set $what where $where"); } function delete($table,$id='') { $id = ($id=='') ? '' : "where $id"; return mysql_query("delete from $table $id"); } function fobject($result) { return mysql_fetch_object($result); } function assoc($result) { return mysql_fetch_assoc($result); } function farray($result) { return mysql_fetch_array($result,MYSQL_NUM); } function nr($result) { return mysql_num_rows($result); } function ar($is_update=false) { if($is_update==false) { return mysql_affected_rows(); } else { preg_match('/Rows matched: ([0-9]+)/',mysql_info(),$matched); $ar = (int) $matched[1]; return $ar; } } function totalQueries() { return $this->QueryCount; } function get_increment($table) { $query = mysql_fetch_assoc(mysql_query('show table status from '.DB_DB." where name='$table'")); return $query['Auto_increment']; } function close() { mysql_close(); } } // Example of usage // // Connecting // On this example, I'm using constants just because I was using this class within an app. define('DB_HOST','localhost'); define('DB_USER','root'); define('DB_PSWD','pswd'); define('DB_DB','posts'); $Db = new Database(); // Inserting a post in table 'posts' with 3 fields/columns: author,title,text // Note that third parameter is optional if the second is already in correct column order $Db->insert('posts',"'Shino','First post','First post text'","'author','title','text'"); // If we had a field 'id' as a primary key and first field/column we would want to get the auto_increment before iserting $new_post_id = $Db->getIncrement('posts'); $Db->insert('posts',"'".$new_post_id."','Shino','Second post','Second post text'"); // Retrieving posts list $posts = $Db->select('posts','title,text,author',"where author='Shino'"); // We could do the following too: // $Db->select('posts','',"where author='Shino'"); // Ommiting the second parameter is the same as '*' while($post = $Db->assoc($posts)) { echo '<h1>'.$post['title'].'</h1>'; echo '<h3>'.$post['author'].'</h3>'; echo '<p>'.$post['text'].'</p>'; } echo '<strong>Articles found: '.$Db->nr($posts).'</strong>'; // Updating post $Db->update('posts',"author='Dee'","id='10'"); // Number of posts updated // We set the parameter to true indicating that it is a update query's result. // We do this because if you accidentaly don't alter anything, for MySQL, it won't look like a update, and the affected_rows will be 0. echo $Db->ar(true).' posts updated'; // Deleting posts with author 'Shino' $Db->delete('posts',"author='Shino'"); // Number of posts deleted echo $Db->ar().' posts deleted'; // Number of queries executed by query() or select() on this page echo $Db->totalQueries(); ?>
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∞ Overloading constructor #2
#include <iostream> using namespace std; class Obj { private: int a; double b; public: Obj(int a, double b); Obj(int a); Obj(); ~Obj(); }; Obj::Obj() { this->a = 1; this->b = 1.0; cerr << "Obj(): " << this->a << " " << this->b << endl; } Obj::Obj(int a) { this->a = a; this->b = 1.0; cerr << "Obj(a): " << this->a << " " << this->b << endl; } Obj::Obj(int a, double b) { this->a = a; this->b = b; cerr << "Obj(a,b): " << this->a << " " << this->b << endl; } Obj::~Obj() { cerr << "Destructor loaded" << endl; } int main(int argc, char **argv) { cerr << "obiekt_a --- "; Obj obiekt_a; cerr << "obiekt_b --- "; Obj obiekt_b(2); cerr << "obiekt_c --- "; Obj obiekt_c(2,3.0); return 0; }