Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>Here's an implementation I used to determine the number of calendar days between two dates:</p> <pre><code>+ (NSInteger)daysBetweenDate:(NSDate*)fromDateTime andDate:(NSDate*)toDateTime { NSDate *fromDate; NSDate *toDate; NSCalendar *calendar = [NSCalendar currentCalendar]; [calendar rangeOfUnit:NSCalendarUnitDay startDate:&amp;fromDate interval:NULL forDate:fromDateTime]; [calendar rangeOfUnit:NSCalendarUnitDay startDate:&amp;toDate interval:NULL forDate:toDateTime]; NSDateComponents *difference = [calendar components:NSCalendarUnitDay fromDate:fromDate toDate:toDate options:0]; return [difference day]; } </code></pre> <p><strong>EDIT:</strong></p> <p>Fantastic solution above, here's Swift version below as an extension on <code>NSDate</code>:</p> <pre><code>extension NSDate { func numberOfDaysUntilDateTime(toDateTime: NSDate, inTimeZone timeZone: NSTimeZone? = nil) -&gt; Int { let calendar = NSCalendar.currentCalendar() if let timeZone = timeZone { calendar.timeZone = timeZone } var fromDate: NSDate?, toDate: NSDate? calendar.rangeOfUnit(.Day, startDate: &amp;fromDate, interval: nil, forDate: self) calendar.rangeOfUnit(.Day, startDate: &amp;toDate, interval: nil, forDate: toDateTime) let difference = calendar.components(.Day, fromDate: fromDate!, toDate: toDate!, options: []) return difference.day } } </code></pre> <p>A bit of force unwrapping going on which you may want to remove depending on your use case.</p> <p>The above solution also works for time zones other than the current time zone, perfect for an app that shows information about places all around the world.</p>
    singulars
    1. This table or related slice is empty.
    1. PONumber of days between two NSDates
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USSam
    1. USBrian
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PONumber of days between two NSDates
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COwhy dont you use, NSDateComponents *difference = [calendar components:NSDayCalendarUnit fromDate:fromDate toDate:toDate options:0]; only.
      singulars
      1. PO
      1. USkarim
    2. CO@karim if you only use that function the difference won't be in "calendar days".
      singulars
      1. PO
      1. USJoão Portela
    3. COVery nice solution!
      singulars
      1. PO
      1. USOscar Broman
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload