gistfile1.m

#import <Foundation/Foundation.h>
/*
 * call:
 *            PrintPathInfo();
 *
 * params:
 *            None.
 *
 * returns:
 *            nothing (void?)
 *
 * Excercises NSString methods for manipulating file path.
 * Logs the location of the current User's home directory
 * and then enumerated a list of the components of that path.
 */
void PrintPathInfo() {
	NSString *path = [@"~" stringByExpandingTildeInPath];
	NSLog(@"My home folder is at '%@'", path);
	for (id component in [path pathComponents]) {
		NSLog(@"%@", component);
	}
}
/*
 * call:
 *			PrintProcessInfo();
 *
 * params:
 *			None.
 *
 * returns:
 *			nothing (void?)
 *
 * Finds out a bit about this own process using NSProcessInfo
 * Logs the process name and process identifier like this:
 * example:
 *          12/09/09 4:18:03 PM WhatATool[13207] Process Name: 'WhatATool' Process Identifier: 13207 
 */
void PrintProcessInfo() {
	NSProcessInfo *process_info = [NSProcessInfo processInfo];
	NSLog(@"Process Name: '%@' Process Identifier: %d", [process_info processName], [process_info processIdentifier]);
}
/*
 * call:
 *			PrintBookmarkInfo();
 *
 * params:
 *			None.
 *
 * returns:
 *			nothing (void?)
 *
 * Play with NSMutableDictionay.
 * Logs urls stored in the dictionary that have keys that
 * begin with 'Stanford'.
 */
void PrintBookmarkInfo() {
	NSMutableDictionary *bookmarks = [NSMutableDictionary dictionaryWithObjectsAndKeys:
										[NSURL URLWithString:@"http://www.stanford.edu"],		@"Stanford University",		
										[NSURL URLWithString:@"http://www.apple.com"],			@"Apple",					
										[NSURL URLWithString:@"http://cs193p.stanford.edu"],	@"CS193P",					
										[NSURL URLWithString:@"http://itunes.stanford.edu"],	@"Stanford on iTunes U",	
										[NSURL URLWithString:@"http://stanfordshop.com"],		@"Stanford Mall", nil];
	
	for (NSString *key in bookmarks) {
		if ([key hasPrefix:@"Stanford"]) {
			NSLog(@"Key: '%@' URL: '%@'", key, [bookmarks objectForKey:key]);
		}
	}
	
}
/*
 * call:
 *			PrintIntrospectionInfo();
 *
 * params:
 *			None.
 *
 * returns:
 *			nothing (void?)
 *
 * Play with Introspection.
 * Logs answers to the following questions about various objects
 * example output:
 *		2008-01-10 20:56:03 WhatATool[360] Class name: NSCFString
 *		2008-01-10 20:56:03 WhatATool[360] Is Member of NSString: NO
 *		2008-01-10 20:56:03 WhatATool[360] Is Kind of NSString: YES
 *		2008-01-10 20:56:03 WhatATool[360] Responds to lowercaseString: YES
 *		2008-01-10 20:56:03 WhatATool[360] lowercaseString is: hello world!.
 */
void PrintIntrospectionInfo() {
	NSMutableArray *bucket = [NSMutableArray arrayWithCapacity:10];
	[bucket addObjectsFromArray:[NSArray arrayWithObjects:
								 [NSURL URLWithString:@"http://www.stanford.edu"], 
								 @"Stanford University", 
								 [NSDictionary dictionaryWithObjectsAndKeys:@"http://www.stanford.edu",@"Stanford University", nil],
								 [NSProcessInfo processInfo],
								 [[NSMutableString alloc] initWithString: @"1st Mutable String"],
								 [[NSMutableString alloc] initWithString: @"2nd Mutable String"],
								 nil]]; 
	for( id obj in bucket) {
		NSLog(@"Class Name: %@", [obj className]);
		NSLog(@"Is Member of NSString: %@", ([obj isMemberOfClass:[NSString class]] == YES ? @"YES" : @"NO"));
		NSLog(@"Is Kind of NSString: %@", ([obj isKindOfClass:[NSString class]] == YES ? @"YES" : @"NO"));
		int responds = [obj respondsToSelector:@selector(lowercaseString)];
		NSLog(@"Responds to lowercaseString: %@", (responds == YES ? @"YES" : @"NO"));
		if (responds == YES) {
			NSLog(@"lowercaseString is: '%@'", [obj lowercaseString]);
		}
		NSLog(@"======================================");
	}
}

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
	
	NSLog(@"======== Section 1 =========");
	PrintPathInfo();
	NSLog(@"======== Section 2 =========");
	PrintProcessInfo();
	NSLog(@"======== Section 3 =========");
	PrintBookmarkInfo();
	NSLog(@"======== Section 4 =========");
	PrintIntrospectionInfo();
	
	NSLog(@"done.");
	
    [pool drain];
    return 0;
}