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C# Sortable collection which allows duplicate keys
... Use this Comparer e.g. with SortedLists or SortedDictionaries, that don't allow duplicate keys
/// </summary>
/// <typeparam name="TKey"></typeparam>
public class DuplicateKeyComparer<TKey>
:
IComparer<TKey> where TKey : IComparable
{
#...
Unignore subdirectories of ignored directories in Git
...
I have a global gitignore file where I ignored all *.zip file. Yet for a particular project, I want to include zip files. I added this line to that project's .gitignore and it works great!: !*.zip
– Jinghao Shi
Mar 21 '15 at 3:44
...
Black transparent overlay on image hover with only CSS?
...0; left:0;
background:rgba(0,0,0,0.6);
opacity: 0;
transition: all 1s;
-webkit-transition: all 1s;
}
Use an opacity of 1 when hovering over the pseudo element in order to facilitate the transition:
.image:hover:after {
opacity: 1;
}
END RESULT HERE
If you want to add text on h...
Using Mockito with multiple calls to the same method with the same arguments
... This answer helped me a lot because doAnswer()/thenAnswer() do not allow chaining multiple calls as doReturn()/thenReturn() do and I needed to compute something and not just return a different value. Creating an anonymous Answer object with a private count variable was what did the trick for...
How does the main() method work in C?
...d nothing bad happens with their given compiler.
This is the case if the calling conventions are such that:
The calling function cleans up the arguments.
The leftmost arguments are closer to the top of the stack, or to the base of the stack frame, so that spurious arguments do not invalidate the ...
Difference between partition key, composite key and clustering key in Cassandra?
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In a situation of COMPOSITE primary key, the "first part" of the key is called PARTITION KEY (in this example key_part_one is the partition key) and the second part of the key is the CLUSTERING KEY (in this example key_part_two)
Please note that the both partition and clustering key can be made b...
find filenames NOT ending in specific extensions on Unix?
Is there a simple way to recursively find all files in a directory hierarchy, that do not end in a list of extensions? E.g. all files that are not *.dll or *.exe
...
How to validate an Email in PHP?
...hould be replaced by the preg family (PCRE Regex Functions). There are a small amount of differences, reading the Manual should suffice.
Update 1: As pointed out by @binaryLV:
PHP 5.3.3 and 5.2.14 had a bug related to
FILTER_VALIDATE_EMAIL, which resulted in segfault when validating
large ...
What is Normalisation (or Normalization)?
...
Normalization is basically to design a database schema such that duplicate and redundant data is avoided. If some piece of data is duplicated several places in the database, there is the risk that it is updated in one place but not the other, lead...
Why is address zero used for the null pointer?
...emory, because it means freeing the pointer again isn't dangerous; when I call malloc it returns a pointer with the value zero if it can't get me memory; I use if (p != 0) all the time to make sure passed pointers are valid, etc.
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