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C# Querying With LINQ Now You're Querying Selecting, Projecting and Anonymous Types

Tojo Alex
PLUS
Tojo Alex
Courses Plus Student 13,331 Points
Posted by Tojo Alex
Tojo Alex
Courses Plus Student 13,331 Points

I really don't understand this

Could you give me a brief explanation of what to do.

CodeChallenge.cs 
var birds = new[] 
{ 
    new { Name = "Pelican", Color = "White" }, 
    new { Name = "Swan", Color = "White" }, 
    new { Name = "Crow", Color = "Black" } 
};

2 Answers

Jared Williams
Jared Williams
5,650 Points

The problem might be because the answer is so simple. All they want you do do is create an anonymously typed variable called "mysteryBird" with the properties "Color" and "Sightings" and fill out the properties. Don't add it to the list, don't use the variable at all, just create the variable. The answer is 1 line of code (if you style it it might take 4, but will only have 1 semicolon). I assume in the next step you will use this "mysteryBird " variable.

Tojo Alex
Tojo Alex
Courses Plus Student 13,331 Points
Tojo Alex
Tojo Alex
Courses Plus Student 13,331 Points

Oh I already figured out what to do (finally) before you posted, though my question now is what is wrong . Error : StudentsCode.cs(13,20): error CS0820: An implicitly typed local variable declarator cannot use an array initializer Compilation failed: 1 error(s), 0 warnings

Code: 

var birds = new[] 
{ 
    new { Name = "Pelican", Color = "White" }, 
    new { Name = "Swan", Color = "White" }, 
    new { Name = "Crow", Color = "Black" } 
};
 var mysteryBird = {Color = "White", Sightings = "3"} ;
Jared Williams
Jared Williams
5,650 Points

You forgot the "new" keyword for your variable.

Tojo Alex
PLUS
Tojo Alex
Courses Plus Student 13,331 Points
Tojo Alex
Tojo Alex
Courses Plus Student 13,331 Points

I added it though it resulted as this : Did you a new variable with the var keyword named "mysteryBird"?

var new mysteryBird = {Color = "White", Sightings = "3"} ;
Jared Williams
Jared Williams
5,650 Points

You need a new before the anonymous object you are creating 

var myVar = new {Prop1 = "hello", Prop2 = "world"};

The new keyword indicates to C# to allocate more memory for the new object that is about to be created. You are basically telling C# that you aren't assigning myVar to an existing object, but that it needs to create a new one in memory and assign it to myVar.

Also, I believe that Sightings should be an int, not a string.