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Flow control: If/else, switches and….dictionaries?

Flow control: If/else, switches and….dictionaries?

.NET languages have a variety of forms of flow control, if statements are easily among the most noticeable. When having to compare multiple statements it is common practice to utilize switch statements due to it’s improved performance, but is there another way? It turns out there is!  We can actually use a dictionary and delegates for flow control! Before we delve into this, how exactly are switch statements utilized by the compiler?

TLDR;

You can use dictionaries in place of large switches and the code is found here.

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Posted by DCCoder in General, Programming, 0 comments
Why I don’t post on the weekends

Why I don’t post on the weekends

I do my best to continue to push content and well-written, informative, articles out to my subscribers.  You may,  or may not, have noticed that no content goes out on the weekends.  Aside from maybe the odd pre-scheduled post.  The reason behind this is because, like many others, I too am susceptible to burn-out.  So what is this burn-out?  Well it’s basically a type of stress that leads to:

  • Physical, mental, and emotional exhaustion
  • Cynicism and detachment
  • Feelings of ineffectiveness and lack of accomplishment

In other words, you will stop caring and lose all motivation.  I have personally experienced burn-out many times.  One of the worst times it got me lasted over a year.  Probably one of the worst things about burn-out is while you may want to push forward and just “get through it”, that has the adverse effect.  There are many well-written articles on this topic, and on how to combat it.  I personally try to simply limit my work to weekdays and focus solely on Family and friends during the weekend.

Taking this approach helps me keep my priorities straight.  This includes both my personal and professional life.  Burn-out is a very serious threat, especially to those of us in IT.  Quite frequently our hobby and our living coincide.  This typically means that 8-5 we are working, 5-11 we are still working (just on personal projects), and 11-7 we are dreaming of work.  I love what I do just as much as the rest but to say the human mind isn’t built for that is an understatement.  Step back from work and find, completely unrelated, hobbies.  Spend time with family, or outside.

This is exactly why I don’t post on the weekends.  I stay away from any form of work and just enjoy life.  This helps me step back into each Monday with a fresh and clear head.

Posted by DCCoder in General, Personal, 0 comments
Hello C# 8, goodbye null reference!

Hello C# 8, goodbye null reference!

Say hello to C# 8.0 and goodbye to those nasty little null-reference exceptions!   That’s right, Microsoft is getting ready to release yet another major version of the language!  This has been common knowledge for a little while now, so I may be slightly behind.  Behind or not, I still wanted to bring it up.  I am excited about all of the changes and features coming in the new C#.  I don’t have the time or the space here to cover all of them but I will touch on some of the most drastic and useful features being added in.

 

Null references

Brace Yourself, NullRef Exception incoming

Let’s face it, we’ve all been there.  Everything compiles, we run our program eagerly awaiting it’s output.  Then BAM!  A big nope screen is thrown in your face, saying something about a NullReferenceException.  Believe it or not Null References were suppose to be a thing of the past a long time ago.  Thankfully the C# designers have finally gotten around to trying to get rid of them.   Currently by default all reference types as well as variable types are nullable, this is all about to change.

Non-nullable by default

Starting with C# 8.0 reference types, by default, will be non-nullable.  Now this isn’t to say that you can’t make them that if you so choose, but again this is by default.  The C# compiler is also going to help you on this quest by throwing some helpful warnings if you forget to check for nulls or forget to make them nullable.   Take a look at the example below:

 

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ISomeType notNull;
ISomeType? mayBeNull;

notNull = null; //This will throw a compile warning
mayBeNull = null; //This won't

Another nice aspect about this is now it will also throw a warning if you forget to check if a nullable is actually null. This is a feature I believe is going to come in very handy. Take a look below:

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ISomeType notNull = GetSomeType();
ISomeType? mayBeNull; = GetSomeType();

mayBeNull.Execute(); //This will throw a warning (we didn't make sure it wasn't null!)
notNull.Execute(); //This will run fine

if(mayBeNull !=null){
  mayBeNull.Execute(); //This won't throw a warning (because we checked)
}

 

Records

I’m sure most of us have worked with POCOs, creating numerous classes that are simply just going to be used to define a data structure and hold it.  Traditionally this meant writing out a whole new class and defining it’s properties.  Thanks to C# 8.0 we now have records!  With records you can easily and quickly create these “container classes” with one line of code!  For example, instead of having to type of this:

 

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public class Person: IEquatable<Person>{
  public string FirstName { get; }
  public string LastName { get; }

  public Person(string firstName, string lastName){
    this.FirstName = firstName;
    this.LastName = lastName;
  }

  public bool Equals (Person other){
    return Equals(FirstName, other.FirstName) && Equals(LastName, other.LastName);
  }

  public override bool Equals(object obj){
    return (obj as Person)?.Equals(this) == true;
  }

  public override int GetHashCode(){
    return FirstName.GetHashCode() + LastName.GetHashCode();
  }

  public void Deconstruct(out string FirstName, out string LastName){
    FirstName = this.FirstName;
    LastName = this.LastName;
  }
}

 

Now you can just do this and get the same results!

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public class Person(string FirstName, string LastName);

Now, I don’t know about you but this is definitely one of the more helpful features that I’ve seen.

 

And many more!

 

These are just two examples that I decided to speak on simply because I find them fascinating but there are many other features in C# 8.0!  Check out the links below to find out more!

3 New C# 8 Features We Are Excited About

Posted by DCCoder in News, Programming, 0 comments
Comments are useless, sometimes evil!

Comments are useless, sometimes evil!

That’s right, I said it. Comments are evil. But wait a minute, I hear you say, they tell us about the code, help us explain what is going on, etc etc.  I’m not saying comments can’t be useful in code, of course they can, but that vast majority are not.  Most that I have seen are simply useless and some are even downright evil.

“Code never lies, comments sometimes do.” – Ron Jeffries

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Posted by DCCoder in Design and Best Practice, General, 0 comments