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

Naval Kulkarni
Naval Kulkarni
13,782 Points
Posted by Naval Kulkarni
Naval Kulkarni
13,782 Points

Create a variable named matchingBirds and assign it a LINQ query on the birds variable that have the same Color property

Create a variable named matchingBirds and assign it a LINQ query on the birds variable that have the same Color property as the mysteryBird object. In the query, return an anonymous type with a property named BirdName and assign to it the Name property of the birds.

CodeChallenge.cs 
var birds = new[] 
{ 
    new { Name = "Pelican", Color = "White" }, 
    new { Name = "Swan", Color = "White" }, 
    new { Name = "Crow", Color = "Black" }
};
var mysteryBird = new {Name="MysteryBird", Color = "White", Sightings =3 };
var matchingBirds = from b in birds where mysteryBird.Color == "White" select new { BirdName = b.Name,BirdColor=b.Color};

1 Answer

Brendan Whiting
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
Brendan Whiting
Front End Web Development Techdegree Graduate 84,738 Points
Brendan Whiting
.a{fill-rule:evenodd;}techdegree seal-36
Brendan Whiting
Front End Web Development Techdegree Graduate 84,738 Points

The problem is your where condition: where mysteryBird.Color == "White". The mysteryBird color is white, so this boolean expression will always be true, which is why we end up with all 3 birds in our result, rather than filtering it down to just 2.

What you want is to check if each bird, b, in the loop has the same color as the mysteryBird: mysteryBird.Color == b.Color

var birds = new[] 
{ 
    new { Name = "Pelican", Color = "White" }, 
    new { Name = "Swan", Color = "White" }, 
    new { Name = "Crow", Color = "Black" }
};
var mysteryBird = new {Name="MysteryBird", Color = "White", Sightings =3 };
var matchingBirds = from b in birds where mysteryBird.Color == b.Color select new { BirdName = b.Name,BirdColor=b.Color};