NSDate experiment

.gitignore

main
*.o

DSTimer.h

#import <Foundation/Foundation.h>

@interface DSTimer : NSObject 

+(instancetype)timerWithInterval:(double)interval
                       andBlock:(void(^)())callback;

-(instancetype)initWithInterval:(double)interval
                       andBlock:(void(^)())callback;

- (void)start;
- (void)cancel;

@end

DSTimer.m

#import <Foundation/Foundation.h>
#import "DSTimer.h"

@implementation DSTimer {
	dispatch_source_t _timer;
	double _interval;
	void (^_callback)();
}

+(instancetype)timerWithInterval:(double)interval
                       andBlock:(void(^)())callback {
	return [[DSTimer alloc] initWithInterval:interval andBlock:callback];
}

-(instancetype)initWithInterval:(double)interval
                       andBlock:(void(^)())callback {
	if(self = [super init]) {
		_interval = interval;
		_callback = callback;
	}
	return self;
}

- (void)start {
	NSLog(@"start: %@", self);
	_timer = dispatch_source_create(
		DISPATCH_SOURCE_TYPE_TIMER, 
		0, 
		0, 
		dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
	);

	if(!_timer) {
		exit(1);
	}

	dispatch_source_set_timer(
		_timer, dispatch_time(DISPATCH_TIME_NOW, _interval * NSEC_PER_SEC), 
		_interval * NSEC_PER_SEC, (1ull * NSEC_PER_SEC) / 10
	);
	dispatch_source_set_event_handler(_timer, _callback);
	dispatch_resume(_timer);
}

- (void)cancel {
	if(_timer) {
		dispatch_source_cancel(_timer);
		_timer = nil;
	}
}

@end

main.m

#import <Foundation/Foundation.h>
#import "DSTimer.h"

NSString *biggamenextdate = @"12/23/14";
NSString *biggamenextestimate = @"113";

int
main (int argc, const char * argv[]) {
	@autoreleasepool {

		NSLog(@"%@",
			[NSString localizedStringWithFormat:@"%-22s %11s\n", "megamillions", "113"]
		);
		NSLog(@"%@",
			[NSString localizedStringWithFormat:@"%-8s %s\n", "next ", "00/00/0000 0d:00h:00m:00s"]
		);
		NSLog(@"%@",
			[NSString localizedStringWithFormat:@"%-22s %11s\n", "powerball", "80"]
		);
		NSLog(@"%@",
			[NSString localizedStringWithFormat:@"%-8s %s\n", "next ", "00/00/0000 0d:00h:00m:00s"]
		);

		NSDateFormatter *format = [[NSDateFormatter alloc] init];
		[format setDateFormat:@"MM/dd/yy HH:mm:ss zz"];
		[format setTimeZone:[NSTimeZone defaultTimeZone]];

		NSLog(@"date: %@", [format stringFromDate:[NSDate date]]);
		NSLog(@"date: %@", [format stringFromDate:[format dateFromString:
				[NSString localizedStringWithFormat:@"%@ 23:00:00 EST", biggamenextdate ]]
		]);

		NSLog(@"default tz: %@", [NSTimeZone defaultTimeZone]);

		// date calculations
		// biggamenextdate - now = [days hour minutes seconds]
		NSLog(@"\n\ndate calculations\n########################################################################\n");
			
			
		void (^tick)() = ^void {
			NSLog(@"tick");
			NSDateComponents *components = [[NSCalendar currentCalendar]
				components : NSCalendarUnitSecond | NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitDay
				  fromDate : [NSDate date]
				    toDate : [format dateFromString : 
						[NSString localizedStringWithFormat:@"%@ 23:00:00 EST", biggamenextdate]
				    ]
				   options : 0
			];
			NSLog(@"%@", components);
		};

		DSTimer *timer = [DSTimer timerWithInterval:0.5 andBlock:tick];
		[timer start];
	
		[[NSRunLoop currentRunLoop] run];
	}

	return 0;
}

makefile

LDFLAGS = -framework Foundation

main : DSTimer.o

all : main

main : main.m

clean :
	-rm -f main DSTimer.o

run : all
	./main

x.pl

#! /Users/nlehman/local/macports/bin/perl

use strict;
use warnings;
use LWP::Simple;
use JSON;

my $content = from_json(get("https://query.yahooapis.com/v1/public/yql/homerj/retirement?format=json"));

my @elements = split(/&/, $content->{query}{results}{html}{body});

foreach my $element (@elements) {
	chomp $element;
	my ($key, $value) = split(/=/, $element);
	$value =~ s/^\s+|\s+$//g if $value;
	printf("%-22s %9s\n", $key, $value)  if $key && $key =~ /^big|power/;
}