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Does .NET have a way to check if List a contains all items in List b?
... }
}
This checks whether there are any elements in b which aren't in a - and then inverts the result.
Note that it would be slightly more conventional to make the method generic rather than the class, and there's no reason to require List<T> instead of IEnumerable<T> - so this would p...
How to get a value of an element by name instead of ID
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+1 for you Nick, because you were able to understand the question.
– kjagiello
Jan 21 '10 at 13:30
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Average of 3 long integers
...ides all three values (it floors the values, so you 'lose' the remainder), and then divides the remainder:
long n = x / 3
+ y / 3
+ z / 3
+ ( x % 3
+ y % 3
+ z % 3
) / 3
Note that the above sample does not always work properly when h...
How to put more than 1000 values into an Oracle IN clause [duplicate]
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Put the values in a temporary table and then do a select where id in (select id from temptable)
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How to implement a rule engine?
...ppet compiles the Rules into fast executable code (using Expression trees) and does not need any complicated switch statements:
(Edit : full working example with generic method)
public Func<User, bool> CompileRule(Rule r)
{
var paramUser = Expression.Parameter(typeof(User));
Expression...
How to configure postgresql for the first time?
I have just installed postgresql and I specified password x during installation.
When I try to do createdb and specify any password I get the message:
...
Version number comparison in Python
I want to write a cmp -like function which compares two version numbers and returns -1 , 0 , or 1 based on their compared valuses.
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Functional style of Java 8's Optional.ifPresent and if-not-Present?
...n Java 8, I want to do something to an Optional object if it is present, and do another thing if it is not present.
12 An...
What is the difference between and ? [duplicate]
...ble piece of code I use the directive <%@include file="reuse.html"%> and in the second I use the tag <jsp:include page="reuse.html" />.
Let the code in the reusable file be :
<html>
<head>
<title>reusable</title>
<meta http-equiv="Content-Type" conten...
Collection that allows only unique items in .NET?
...set operations. A set is a collection that contains no duplicate elements, and whose elements are in no particular order.
Note that the HashSet<T>.Add(T item) method returns a bool -- true if the item was added to the collection; false if the item was already present.
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