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Calculate difference between two dates (number of days)?
I see that this question has been answered for Java , JavaScript , and PHP , but not C#. So, how might one calculate the number of days between two dates in C#?
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Does Spring Data JPA have any way to count entites using method name resolving?
...o different ways,
1) The new way, using query derivation for both count and delete queries. Read this, (Example 5).
Example,
public interface UserRepository extends CrudRepository<User, Integer> {
Long countByName(String name);
}
2) The old way, Using @Query annotation.
Example,
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Check if list contains any of another list
... performing on larger collections would be to project parameters to source and then use Intersect which internally uses a HashSet<T> so instead of O(n^2) for the first approach (the equivalent of two nested loops) you can do the check in O(n) :
bool hasMatch = parameters.Select(x => x.sour...
What is the difference between map and flatMap and a good use case for each?
Can someone explain to me the difference between map and flatMap and what is a good use case for each?
16 Answers
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How can I change the color of pagination dots of UIPageControl?
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UPDATE:
This answer is 6 years old and very outdated, but it's still attracting votes and comments. Ever since iOS 6.0 you should be using the pageIndicatorTintColor and currentPageIndicatorTintColor properties on UIPageControl.
ORIGINAL ANSWER:
I ran into t...
Ignoring a class property in Entity Framework 4.1 Code First
My understanding is that the [NotMapped] attribute is not available until EF 5 which is currently in CTP so we cannot use it in production.
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Simple way to encode a string according to a password?
...simple obfuscation that will obscure things from the very casual observer, and you aren't looking to use third party libraries. I'd recommend something like the Vigenere cipher. It is one of the strongest of the simple ancient ciphers.
Vigenère cipher
It's quick and easy to implement. Something l...
PostgreSQL: Difference between text and varchar (character varying)
What's the difference between the text data type and the character varying ( varchar ) data types?
9 Answers
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How set the android:gravity to TextView from Java side in Android
I can use android:gravity="bottom|center_horizontal" in xml on a textview to get my desired results, but I need to do this programmatically. My textview is inside a tablerow if that matters in a relativelayout .
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Why can't I have abstract static methods in C#?
I've been working with providers a fair bit lately, and I came across an interesting situation where I wanted to have an abstract class that had an abstract static method. I read a few posts on the topic, and it sort of made sense, but is there a nice clear explanation?
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