bouchtaoui-dev

// This one I use very often
dispatch_async(dispatch_get_main_queue(), ^{
  // run following code in main queue
  // this block will be put in the queue to be executed later
});

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
	// do some task in background
	dispatch_async(dispatch_get_main_queue(), ^{
		// update some UI

bouchtaoui-dev

@interface Box:NSObject
{
    //Instance variables
    double length;   // Length of a box
    double breadth;  // Breadth of a box
}
@property(nonatomic, readwrite) double height; // Property

@end

bouchtaoui-dev

#import <Foundation/Foundation.h>

#if DEBUG == 0
#define DBLog(...)
#elif DEBUG == 1
#define DBLog(...) NSLog(__VA_ARGS__)
#endif

int main()

bouchtaoui-dev

-(NSString *) someMethod:(int) id withError:(NSError **)errorPtr{
    if(id == 1)
    {
       return @"Execution of some code...";
    }
    else
    {
       NSString *domain = @"com.MyCompany.MyApplication.ErrorDomain";
       NSString *desc =@"Unable to complete the process";
       NSDictionary *userInfo = [[NSDictionary alloc] 

bouchtaoui-dev

// NSString+MyAddition.h

@interface NSString(MyAdditions)

- (NSString *) getCopyRightString;

@end

@implementation NSString(MyAdditions)

bouchtaoui-dev

// in some class.h

@protocol ProtocolName
@required
// list of required methods
@optional
// list of optional methods
@end

bouchtaoui-dev

#include <stdio.h>
#include <wiringPi.h>

#define LED     4
#define PIR     5

int main() {
        // doe een setup om wiringPi te gebruiken
        if(wiringPiSetup()<0) {
                printf("Error setting up wiringPi...");

bouchtaoui-dev

#include <signal.h>
#include <stdio.h>
#include <wiringPi.h>

#define LED     4
#define PIR     5

volatile char isRunning = 1;

void processMotionDetection();

bouchtaoui-dev

/**
 * promise object
 * Explanation: When creating a promise object, it is supposed to be in a pending state.
 * If a certain process succeeded, we call resolve() callback and it is assumed resolved,
 * also called fulfilled. Meaning, you fulfilled your promise :)
 * If the process failed, than the promise is rejected.
 */
let promise = new Promise((resolve, reject) => {
    // We're now in a pending state
    User.find({}, (user, err) => {  // <-- this an async work

bouchtaoui-dev

/**
 * promise object
 */

function getUserWithId(id) {
    return new Promise((resolve, reject) => {
        // Look for a user with id in the database
        User.find({_id: id}, (user, err) => {
            if(err) return reject(err);