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Number of days between two NSDates [duplicate]
...ays between two dates:
+ (NSInteger)daysBetweenDate:(NSDate*)fromDateTime andDate:(NSDate*)toDateTime
{
NSDate *fromDate;
NSDate *toDate;
NSCalendar *calendar = [NSCalendar currentCalendar];
[calendar rangeOfUnit:NSCalendarUnitDay startDate:&fromDate
interval:NULL forD...
'is' versus try cast with null check
...// only one cast
if (myObjRef != null)
{
// myObjRef is already MyType and doesn't need to be cast again
...
}
C# 7.0 supports a more compact syntax using pattern matching:
if (myObj.myProp is MyType myObjRef)
{
...
}
...
Volatile Vs Atomic [duplicate]
...rite -- such as i++, which is equivalent to i = i + 1, which does one read and one write -- is not atomic, since another thread may write to i between the read and the write.
The Atomic classes, like AtomicInteger and AtomicReference, provide a wider variety of operations atomically, specifically i...
How can I change property names when serializing with Json.net?
...data in a C# DataSet object. I can serialize it right now using a Json.net converter like this
3 Answers
...
Python3 integer division [duplicate]
In Python3 vs Python2.6, I've noticed that I can divide two integers and get a float. How do you get the Python2.6 behaviour back? Is there a different method to get int/int = int?
...
NTFS performance and large volumes of files and directories
How does Windows with NTFS perform with large volumes of files and directories?
7 Answers
...
String.IsNullOrWhiteSpace in LINQ Expression
...sitor = new QueryVisitor();
return queryable.Where(visitor.VisitAndConvert(where, "WhereEx"));
}
}
So if you run myqueryable.WhereEx(c=> !c.Name.IsNullOrWhiteSpace()) it will be converted to !(c.Name == null || x.Trim() == "") before being passes to whatever (linq to sql/entities) a...
Advantages to Using Private Static Methods
...
I would also add that a "static" clause does not harm and provides already some "documentation" with 1 word. It tells you that this method is not using any instance member, and you get this documentation almost for free
– frandevel
Apr 30 '...
How do I use a PriorityQueue?
... constructor overload which takes a Comparator<? super E> comparator and pass in a comparator which compares in the appropriate way for your sort order. If you give an example of how you want to sort, we can provide some sample code to implement the comparator if you're not sure. (It's pretty ...
Algorithm to return all combinations of k elements from n
I want to write a function that takes an array of letters as an argument and a number of those letters to select.
71 Answe...