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NSUserDefaults - How to tell if a key exists
...ine if it's defined NO or doesn't exist. I think you'd have to use – dictionaryRepresentation and check for the key.
– zekel
Feb 13 '12 at 20:13
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Fluent and Query Expression — Is there any benefit(s) of one over other?
...s more concise with simple queries. You can get the best of both worlds by mixing query and method syntax. This is often done in LINQ to SQL queries:
var query =
from c in db.Customers
let totalSpend = c.Purchases.Sum (p => p.Price) // Method syntax here
where totalSpend > 1000
fro...
How to get a thread and heap dump of a Java process on Windows that's not running in a console
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You might be mixing up JDK and JRE, I explicitly mentioned JDK. See the documentation for the tools: download.oracle.com/javase/6/docs/technotes/tools/share/… and download.oracle.com/javase/6/docs/technotes/tools/share/…
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Creating a segue programmatically
...roller that all my UIViewsControllers extend to reuse some common operations.
13 Answers
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This IP, site or mobile application is not authorized to use this API key
...e this:
https://maps.googleapis.com/maps/api/place/nearbysearch/json?location=yourlatitude,yourlongitude&radius=5000&sensor=true&key=SERVERKEY
Now, to obtain the server key, just follow these steps:
1) Go to Developer Console https://code.google.com/apis/console/
2) In the Credential...
How do I sort an NSMutableArray with custom objects in it?
...ustom comparator-methods is possible as well. Have a look at the documentation.
Blocks (shiny!)
There's also the possibility of sorting with a block since Mac OS X 10.6 and iOS 4:
NSArray *sortedArray;
sortedArray = [drinkDetails sortedArrayUsingComparator:^NSComparisonResult(id a, id b) {
NS...
When should I release objects in -(void)viewDidUnload rather than in -dealloc?
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In addition to what has already been indicated, I wanted to elaborate more about logic behind -viewDidUnload.
One of the most important reasons for implementing it is that UIViewController subclasses commonly also contain owning r...
Django set field value after a form is initialized
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To throw yet another way into the mix: this works too, with a bit more modern notation. It just works around the fact that a QueryDict is immutable.
>>> the_form.data = {**f.data.dict(), 'some_field': 47}
>>> the_form['some_field'].as_widge...
Obtain Bundle Identifier programmatically
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Swift 3.0
let bundleIdentifier = Bundle.main.bundleIdentifier
Xamarin.iOS
var bundleIdentifier = NSBundle.MainBundle.BundleIdentifier
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How do you create a Swift Date object?
...th = 7
dateComponents.day = 11
dateComponents.timeZone = TimeZone(abbreviation: "JST") // Japan Standard Time
dateComponents.hour = 8
dateComponents.minute = 34
// Create date from components
let userCalendar = Calendar.current // user calendar
let someDateTime = userCalendar.date(from: dateCompone...