All Sorts of UNIX Timestamp Goodness
I'm writing some tracking software and came upon the need to be able to get the two timestamps (UNIX timestamp: the number of seconds elapsed since midnight Coordinated Universal Time (UTC) of January 1, 1970, not counting leap seconds) of a given period of time. This period of time would be represented in words via a GET parameter in my application. To you, I present my switch statement to produce those two timestamps.
The hardest of all was getting "this week last year". Please note that all weeks begin on Monday.
You can check the resulting timestamps using this cool online timestamp converter.
switch($period)
{
case "yesterday":
$timestamp_start = mktime(0, 0, 0, date("n"), date("d")-1, date("Y"));
$timestamp_stop = mktime(23, 59, 59, date("n"), date("d")-1, date("Y"));
break;
case "this_week":
$timestamp_start = mktime(0, 0, 0, date("n"), date("j"), date("Y")) - ((date("N")-1)*3600*24);
$timestamp_stop = time();
break;
case "this_month":
$timestamp_start = mktime(0,0,0, date("n"), 1, date("Y"));
$timestamp_stop = time();
break;
case "this_year":
$timestamp_start = mktime(0,0,0, 1, 1, date("Y"));
$timestamp_stop = time();
break;
case "last_week":
$timestamp_start = mktime(0, 0, 0, date("n"), date("j")-6, date("Y")) - ((date("N"))*3600*24);
$timestamp_stop = mktime(23, 59, 59, date("n"), date("j"), date("Y")) - ((date("N"))*3600*24);
break;
case "last_month":
$timestamp_start = mktime(0,0,0,date("n")-1, 1, date("Y"));
$timestamp_stop = mktime(23, 59, 59, date("n"), date("d")-date("j"), date("Y"));
break;
case "last_year":
$timestamp_start = mktime(0,0,0,1, 1, date("Y")-1);
$timestamp_stop = mktime(23,59,59,12,31, date("Y")-1);
break;
case "last_half_hour":
$timestamp_start = mktime(date("h"), date("i")-30, date("s"), date("n"), date("d"), date("Y"));
$timestamp_stop = time();
break;
case "last_hour":
$timestamp_start = mktime(date("h")-1, date("i"), date("s"), date("n"), date("d"), date("Y"));
$timestamp_stop = time();
break;
case "last_24_hours":
$timestamp_start = mktime(date("h"), date("i"), date("s"), date("n"), date("d")-1, date("Y"));
$timestamp_stop = time();
break;
case "last_seven_days":
$timestamp_start = mktime(date("h"), date("i"), date("s"), date("n"), date("d")-7, date("Y"));
$timestamp_stop = time();
break;
case "last_thirty_days":
$timestamp_start = mktime(date("h"), date("i"), date("s"), date("n"), date("d")-30, date("Y"));
$timestamp_stop = time();
break;
case "same_day_last_week":
$timestamp_start = mktime(0, 0, 0, date("n"), date("d")-7, date("Y"));
$timestamp_stop = mktime(23, 59, 59, date("n"), date("d")-7, date("Y"));
break;
case "same_week_last_year":
$timestamp_start = mktime(0, 0, 0, date("n"), date("j"), date("Y")-1)
- ( (date("N", mktime(0, 0, 0, date("n"), date("j"), date("Y") - 1 ) ) - 1 ) * 86400 );
$timestamp_stop = mktime(23, 59, 59, date("n"), date("j") + 7, date("Y")-1)
- ( (date("N", mktime(0, 0, 0, date("n"), date("j"), date("Y") - 1 ) ) - 1 ) * 86400 );
break;
case "same_month_last_year":
$timestamp_start = mktime(0,0,0, date("n"), 1, date("Y") - 1);
$timestamp_stop = mktime(23, 59, 59, date("n"), date("t"), date("Y") - 1);
break;
case "today":
default:
$timestamp_start = mktime(0,0,0, date("n"), date("d"), date("Y"));
$timestamp_stop = time();
break;
}
My First Objective-C Cocoa Code – “String Between”
I needed a string searching method in Objective-C for a little app I'm writing that searched a string and found substrings in-between two other strings... sort of a poor man's regex. It extends the NSString object so once you've imported it in your main header, you can call the method on an NSString object. I couldn't find anything in the Cocoa API that did what I was looking for so I did it myself.
Here's what I came up with... I present to you: "StringBetween"
StringBetween.h
@interface NSString (StringBetween) -(NSString *)stringBetween:(NSString*)aString and:(NSString *)bString; @end
StringBetween.m
#import "StringBetween.h"
@implementation NSString (StringBetween)
-(NSString *)stringBetween:(NSString *)aString and:(NSString *)bString
{
NSAutoreleasePool *autoreleasepool = [[NSAutoreleasePool alloc] init];
//Find the range of the first string
NSRange aRange = [self rangeOfString:aString options:(NSCaseInsensitiveSearch)];
if(aRange.length > 0){
//Make a new range to search for the next string
NSRange searchRange;
searchRange.location = aRange.location;
searchRange.length = [self length] - aRange.location;
//Find the next string
NSRange bRange = [self rangeOfString:bString options:(NSCaseInsensitiveSearch) range:searchRange];
//NSLog(@"%d, %d", aRange.location, aRange.length);
//NSLog(@"%d, %d", bRange.location, bRange.length);
if(bRange.length > 0)
{
searchRange.location = aRange.location + aRange.length;
searchRange.length = bRange.location - searchRange.location;
return [self substringWithRange:searchRange];
}
}
return @"";
[autoreleasepool release];
}
@end
Here is an actual implementation example:
main.m
#import <cocoa/Cocoa.h>
#import "StringBetween.h"
int main (int argc, const char * argv[]) {
NSString *thisString = @"The quick brown fox jumped over the lazy dog.";
NSLog([thisString stringBetween:@"qui" and:@"the"]);
//Returns @"ck brown fox jumped over "
NSLog([thisString stringBetween:@"garbage" and:@"more garbage"]);
//Returns @""
return 0;
}
I hope I didn't muck up that code too bad. I'm still learning Objective-C.
Here's an X-Code project download if you want to see it in action.
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- Total runs: 169
- Total distance: 298.44mi
- Total time: 86hr 53min 47sec
- Total calories: 39,935
- Avg pace per mi: 17'28"
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- Farthest Run: 6.43mi
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- Distance: 1.16mi
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- Calories: 85
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