Introduction to generics in C# Part 6

March 9, 2016 Leave a comment

Introduction

In the previous post we looked at constraints on generic type parameters using the ‘where’ keyword. We looked at an example where we wanted to limit the usage of an interface, IPropertiesPrinter, to those objects that implement another interface, namely IPrintable. We wanted to make sure that the generic type, i.e. the object to be printed, will have the GetProperties() method available. Without the constraint the generic object would only have the methods inherited from the Object class, such as ToString and GetHashCode.

In this post we’ll look at an example where not even constraints seem to provide a solution. I wanted to include this example in this series to show that sometimes not even generics can help create generic code.

Read more of this post

Filed under .NET, C# language features, Generics Tagged with ,

Introduction to generics in C# Part 5

March 8, 2016 1 Comment

Introduction

In the previous post we looked at how to declare multiple type parameters. We saw that it was a very simple thing to do. We just add as many parameters as we need and separate them by a comma. It’s perfectly fine to refer to those parameters later on in the class level functions. It’s equally fine to put multiple parameters on the function level as well if you don’t want to make the entire class generic.

In this post we’ll take a quick look at parameter type constraints.

Read more of this post

Filed under .NET, C# language features, Generics Tagged with ,

Introduction to generics in C# Part 4

March 7, 2016 Leave a comment

Introduction

In the previous post we saw how to build generic functions. It’s not necessary to make an entire class generic if we want to keep the functions independent of any class level type parameters. We saw an example, a configuration settings reader, where it was unnecessary to declare the return type on the class level. That would put a constraint on the usage of a single configuration reader instance. Instead, we let the caller define the return type on the ReadConfigurationValue function which makes the configuration reader class more flexible.

In this post we’ll look at declaring multiple generic parameters.

Read more of this post

Filed under .NET, C# language features, Generics Tagged with ,

Python language basics 85: file I/O resource management with try-finally

March 6, 2016 Leave a comment

Introduction

In the previous post we started looking into file operations in Python. We discussed various basic terms such as the file access mode and character encoding. We also went through some very basic code to write to a text file. We saw that the code wasn’t well designed. It is error-prone and not very reliable.

In this post we’ll present a way to make the code better with a traditional try-except-finally block.

Read more of this post

Filed under python Tagged with ,

Python language basics 84: starting with file I/O

March 5, 2016 Leave a comment

Introduction

In the previous post we finished discussing the basics of object inheritance in Python. We saw an example where the Dog and a Duck classes inherited from an abstract base class called Animal. All common functionality was encapsulated within the Animal class. Dog and Duck retained the code specific to them.

In this post we’ll start looking into something very different: file input and output.

Read more of this post

Filed under python Tagged with ,

Introduction to generics in C# Part 3

March 4, 2016 Leave a comment

Introduction

In the previous post on generics we looked at an example of reading application settings from a configuration file. Application settings come in key-value pairs where the value can be of different type: string, integer, boolean and various others. The generic ConfigurationReaderService helped us improve the non-generic code where the function caller had to take care of the type conversion and validation steps.

In this post we’ll further improve our code by looking into generic methods.

Read more of this post

Filed under .NET, C# language features, Generics Tagged with ,

Introduction to generics in C# Part 2

March 3, 2016 Leave a comment

Introduction

In the previous post we started looking into generics in .NET. We also saw an initial example where an abstract base class had a type parameter to define the type of the Id property. The implementing classes could then all derive from this generic class and define their Id type along the way.

In this post we’ll look at another example where generics can be useful.

Read more of this post

Filed under .NET, C# language features, Generics Tagged with ,

TCP level communication with C# .NET: the server

March 2, 2016 Leave a comment

.NET has the necessary objects to enable TCP-level messaging in the System.Net.Sockets namespace. The key objects to build an extremely simple TCP server are TcpListener and Socket. The TCP client and server can communicate in a stream-like fashion over the network using the NetworkStream object.

Here’s an example of how a TCP server can ingest the message of a single client:

Read more of this post

Filed under .NET, Messaging Tagged with , ,

Introduction to generics in C# Part 1

March 1, 2016 Leave a comment

Introduction

Generics is a way to generalise your code in .NET. We can generalise the types that an object and/or a function operates on. With generics we can reuse the same portion of code with multiple types. If used in appropriate places it can be a great tool against code duplication.

Generics is nothing new, it was a new language feature in .NET 2.0.

Read more of this post

Filed under .NET, C# language features, Generics Tagged with ,

Listing all performance counters on Windows with C# .NET

February 29, 2016 Leave a comment

Performance counters in Windows can help you with finding bottlenecks in your application. There’s a long range of built-in performance counters in Windows which you can view in the Performance Monitor window:

Performance Monitor window

Right-click anywhere on the larger screen to the right and select Add Counters to add your counters to the graph. The Add Counters window will show the categories first. You can then open a category and select one or more specific counters within that category. The graph will show the real-time data immediately:

Read more of this post

Filed under .NET, Diagnostics Tagged with , ,

← Older posts

Newer posts →

Elliot Balynn's Blog

A directory of wonderful thoughts

Software Engineering

Web development

Disparate Opinions

Various tidbits

chsakell's Blog

WEB APPLICATION DEVELOPMENT TUTORIALS WITH OPEN-SOURCE PROJECTS

Once Upon a Camayoc

ARCHIVED: Bite-size insight on Cyber Security for the not too technical.