Tips and tricks in C# .NET
August 30, 2017 Leave a comment
In this post we saw how to determine if two arrays are structurally equal in .NET. Two arrays are said to be structurally equal if they contain the same elements in the same order.
Structural equality has a comparison counterpart: IStructuralComparable. It determines if an array comes before or after or is equal to another array based on the elements within it.
March 28, 2017 Leave a comment
In this post we saw how to use the generic IEqualityComparer of T interface to indicate equality for our custom types. If you need a similar comparer for strings then there’s a ready-made static class called StringComparer which can construct string comparers for you.
The StringComparer class provides comparers for the common string comparison scenarios: ordinal, locale specific and invariant culture comparisons. This is a good MSDN article on the differences between these.
January 12, 2017 Leave a comment
Two HashSet objects in C# are equal if they contain the same values regardless of their order in the collection.
Consider the following integer sets:
HashSet<int> intHashSetOne = new HashSet<int>()
{
1,2,6,5,7,5
};
HashSet<int> intHashSetTwo = new HashSet<int>()
{
2,2,8,5,9,4
};
HashSet<int> intHashSetThree = new HashSet<int>()
{
6,7,5,5,2,1
};
January 7, 2017 1 Comment
In this post we saw how to determine if two arrays are structurally equal in .NET. Two arrays are said to be structurally equal if they contain the same elements in the same order.
Structural equality has a comparison counterpart: IStructuralComparable. It determines if an array comes before or after or is equal to another array based on the elements within it.
November 16, 2016 Leave a comment
In this post we saw how to use the generic IEqualityComparer of T interface to indicate equality for our custom types. If you need a similar comparer for strings then there’s a ready-made static class called StringComparer which can construct string comparers for you.
The StringComparer class provides comparers for the common string comparison scenarios: ordinal, locale specific and invariant culture comparisons. This is a good MSDN article on the differences between these.
September 13, 2016 Leave a comment
The GroupBy operator has the same function as GROUP BY in SQL: group elements in a sequence by a common key. The GroupBy operator comes with 8 different signatures. Each returns a sequence consisting of objects that implement the IGrouping interface of type K – the key type – and T – the type of the objects in the sequence. IGrouping implements IEnumerable of T. So when we iterate through the result the we can first look at the outer sequence of keys and then the inner sequence of each object with that key.
The simplest version of GroupBy accepts a Func delegate of T and K, which acts as the key selector. It will compare the objects in the sequence using a default comparer. E.g. if you want to group the objects by their integer IDs then you can let the default comparer do its job. Another version of GroupBy lets you supply your own comparer to define a custom grouping or if the Key is an object where you want to define your own rules for equality.
We’ll need an example sequence which has an ID. In the posts on LINQ we often take the following collections for the demos:
August 23, 2016 Leave a comment
In this post we saw how to implement the generic IEquatable interface to make two custom objects equatable using the static Equals method.
You’re probably aware of the equality operator ‘==’ in C#. Let’s see what happens if you try to use it for a custom object:
public class Person
{
public int Id { get; set; }
public string Name { get; set; }
public int Age { get; set; }
}
A great WordPress.com site
A directory of wonderful thoughts
Developer on Microsoft Technologies
A Good Blog is Hard to Find
Wissenswertes zu Webentwicklung, Domain-Driven Design und Microservices
thoughts, ideas, diagrams,enterprise code, design pattern , solution designs
on Microsoft technologies, Web, Android and others
Web development
Various tidbits
Anything around ASP.NET MVC,WEB API, WCF, Entity Framework & AngularJS
Bite-size insight on Cyber Security for the not too technical.
OneSolution To dOTnET.
Measuring programming progress by lines of code is like measuring aircraft building progress by weight.
