#import <Foundation/Foundation.h>

void PrintPathInfo() {
	NSString *path = @"~";
	path = [path stringByStandardizingPath];
	NSString *aString = [NSString stringWithFormat:@"My home folder is at: '%@'", path];
	NSLog(aString);
	NSArray *aArray = [path componentsSeparatedByString:@"/"];
	
	int i = 0;
	int o = [aArray count] - 1;
	
	while (i <= o) {
		if(i == 0) {
			NSLog(@"/");
		}
		else {
			NSString* bString = [aArray objectAtIndex:i];
			NSLog(bString);
		}
		i++;
	}
	
}


void PrintProcessInfo() {
	NSProcessInfo * aInfo = [NSProcessInfo processInfo];
	int aInt = [aInfo processIdentifier];
	NSString * aString = [aInfo processName];
	NSString * bString = [NSString stringWithFormat:@"Process Name: '%@' Process ID: '%i'", aString, aInt];
	NSLog(bString);
}

void PrintBookmarkInfo() {
	
	NSArray *keys =		[NSArray arrayWithObjects:
						@"Stanford University",
						@"Apple",
						@"CS193P", 
						@"Stanford on iTunes U",
						@"Stanford Mall", 
						nil];
	
	NSArray *values =	[NSArray arrayWithObjects:
						[NSURL URLWithString:@"http//www.stanford.edu"],
						[NSURL URLWithString:@"http//www.apple.com"],
						[NSURL URLWithString:@"http//cs193p.stanford.edu"],
						[NSURL URLWithString:@"http//itunes.stanford.edu"],
						[NSURL URLWithString:@"http//stanfordshop.com"],
						nil];
	
	NSDictionary *aDictionary = [NSDictionary dictionaryWithObjects:values forKeys:keys];
		
	for (id key in aDictionary) {
		if([key hasPrefix:@"Stanford"]) {
			NSLog(@"Key: '%@' URL: '%@'", key, [aDictionary objectForKey:key]);
		}
	}
	
}

void PrintIntrospectionInfo() {
	NSArray * aArray = [NSArray arrayWithObjects:[NSString stringWithString:@"HELLO WORLD!"],[NSURL URLWithString:@"http://www.web6.nl"],[NSDictionary init], nil];
	for (id value in aArray) {
		
		//Getting the classname
		NSString * className = [[value class] description];
		NSLog(	@"Class name: %@",className);
		
		//Checking if it is a member of NSString
		NSString * stringChild;
		if ( [value superclass] == [NSString class] ) {
			stringChild = @"YES";
		}
		else {
			stringChild = @"NO";
		}
		NSLog(@"Is Member of NSString: %@",stringChild);
		
		//Checking if it is kind of an NSString
		NSString * stringKind;
		if ( [value isKindOfClass:[NSString class]] ) {
			stringKind = @"YES";
		}
		else {
			stringKind = @"NO";
		}
		NSLog(@"Is Kind of NSString: %@",stringKind);
		
		//Checking if it resomonds to selectors
		NSString * selectorResponse;
		if ([value respondsToSelector:@selector(lowercaseString)]) {
			selectorResponse = @"YES";
		}
		else {
			selectorResponse = @"NO";
		}
		NSLog(@"Responds to lowercaseString: %@",selectorResponse);
		
		//Prefiorm Selector
		if(selectorResponse == @"YES") {
			NSLog(@"lowercaseString is: %@",[value performSelector:@selector(lowercaseString)]);
		}
			
		
		NSLog(	@"=================================");
	}
	
	

}

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

	PrintPathInfo();           // Section 1 
	NSLog(	@"\n");
	PrintProcessInfo();        // Section 2 
	NSLog(	@"\n");
	PrintBookmarkInfo();       // Section 3 
	NSLog(	@"\n");
	PrintIntrospectionInfo();  // Section 4
	
    [pool drain];
    return 0;
}