Tips and tricks in C# .NET
September 11, 2017 Leave a comment
In this post we saw how to retrieve all logical drives using Windows Management Instrumentation – WMI -, and here how to find all network adapters.
Say you’d like to get a list of all Windows Services and their properties running on the local – “root” – machine, i.e. read the services listed here:
The following code will find all non-null properties of all Windows services found:
September 10, 2017 Leave a comment
Introduction
If you’re familiar with .NET then you already know what Lambda expressions are and how useful they can be. They were not available in Java before version 8. Let’s investigate how they can be applied in Java.
First example: an interface method with a single parameter
Say you have the following Employee class:
September 9, 2017 Leave a comment
Occasionally it can be worth putting a task on a different thread so that it doesn’t block the main thread. Examples include a task that analyses heavy files, a task that sends out emails etc. If we put these tasks on a different thread and don’t wait for it to return a result then it’s called the fire-and-forget pattern. We start a new thread and let it run in the background. The task on the different thread is expected to carry out its functions independently of the main thread.
Let’s imagine that the following greetCustomer method is something we want to run on separate thread so that the main thread is not blocked:
September 8, 2017 1 Comment
Here comes another tip if you’re looking for free images as placeholders for your front-end web development: Unsplash
The site has a wide range of categories to search for suitable images and it’s all free of charge although crediting is appreciated.
September 7, 2017 1 Comment
Say you have the following two sequences:
string[] first = new string[] {"hello", "hi", "good evening", "good day", "good morning", "goodbye" };
string[] second = new string[] {"whatsup", "how are you", "hello", "bye", "hi"};
If you’d like to find the common elements in the two arrays and put them to another sequence then it’s very easy with the Intersect operator:
IEnumerable<string> intersect = first.Intersect(second);
foreach (string value in intersect)
{
Console.WriteLine(value);
}
The ‘intersect’ variable will include “hello” and “hi” as they are common elements to both arrays.
September 6, 2017 Leave a comment
Say you have two sequences of objects:
string[] bands = { "ACDC", "Queen", "Aerosmith", "Iron Maiden", "Megadeth", "Metallica", "Cream", "Oasis", "Abba", "Blur", "Chic", "Eurythmics", "Genesis", "INXS", "Midnight Oil", "Kent", "Madness", "Manic Street Preachers" , "Noir Desir", "The Offspring", "Pink Floyd", "Rammstein", "Red Hot Chili Peppers", "Tears for Fears" , "Deep Purple", "KISS"};
string[] bandsTwo = { "ACDC", "Queen", "Aerosmith", "Iron Maiden", "Megadeth", "Metallica", "Cream", "Oasis", "Abba", "Blur", "Chic", "Eurythmics", "Genesis", "INXS", "Midnight Oil", "Kent", "Madness", "Manic Street Preachers" , "Noir Desir", "The Offspring", "Pink Floyd", "Rammstein", "Red Hot Chili Peppers", "Tears for Fears" , "Deep Purple", "KISS"};
If you’d like to check whether the two sequences include the same elements then you can use the SequenceEquals LINQ operator:
September 5, 2017 Leave a comment
Say you have two sequences of the same object type:
string[] first = new string[] {"hello", "hi", "good evening", "good day", "good morning", "goodbye" };
string[] second = new string[] {"whatsup", "how are you", "hello", "bye", "hi"};
You’d then like to join the two sequences containing the values from both but filtering out duplicates. Here’s how to achieve that with the first prototype of the LINQ Union operator:
September 4, 2017 Leave a comment
Here comes a quick tip for you who want to convert hexadecimal colour codes into RGB values: HEX to RGB converter
The background of the tool changes as you enter the hexadecimal value into the simple form in the middle of the page.
September 3, 2017 Leave a comment
Here’s a quick tip if you need to get some ideas about colour schemes that work well for HTML pages: Coolors IO.
It’s a free resource that can save you a lot of time if you are not a front-end designer but need a palette of 3-4 colours for the background, fonts, columns etc. Click on the Explore link in the top right hand menu and you’ll get a large amount schemes. The colour codes and names are also available for your CSS file.
September 2, 2017 Leave a comment
If you need a number of placeholder images to fill a web page just for testing then the following resource if for you: Lorem pixel.
Examples:
…and there’s much more. If you need placeholder images for your web project then make sure you check out this resource.
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Exercises in .NET with Andras Nemes 