Unlocking LINQ: Basic Katas for C# Programmers

Do you want to test your skills as a C# programmer? Are you a beginner eager to learn more about programming problems and solutions? Or perhaps you’re looking for a challenging way to sharpen your LINQ knowledge? Here is a set of C# LINQ katas designed to help you master the basics of LINQ and improve your programming skills. These katas will guide you through fundamental concepts and provide practical problems to solve, making them perfect for honing your abilities and deepening your understanding of LINQ in C#.

1. Just clone this repository

git clone https://github.com/FractalCodeRicardo/katas-linq.git

2. You are provided with a class and a data list.

public record Animal(
    string Name = "",
    string Type = "",
    double Weight = 0.0,
    double Height = 0.0
);

public static IEnumerable<Animal> Get()
{
    var animals = new List<Animal>
    {
        new (Name: "Lion", Type: "Mammal", Weight: 190.0, Height: 3.5),
        new (Name: "Elephant", Type: "Mammal", Weight: 5000.0, Height: 10.0),
        new (Name: "Penguin", Type: "Bird", Weight: 1.5, Height: 0.5),
        new (Name: "Snake", Type: "Reptile", Weight: 10.0, Height: 1.0),
        new (Name: "Dolphin", Type: "Mammal", Weight: 300.0, Height: 2.0),
        new (Name: "Eagle", Type: "Bird", Weight: 5.0, Height: 0.8),
        new (Name: "Tiger", Type: "Mammal", Weight: 250.0, Height: 3.0),
        new (Name: "Crocodile", Type: "Reptile", Weight: 150.0, Height: 2.5),
        new (Name: "Giraffe", Type: "Mammal", Weight: 1200.0, Height: 5.5),
        new (Name: "Hawk", Type: "Bird", Weight: 2.0, Height: 0.6),
        // Duplicated hawk
        new (Name: "Hawk", Type: "Bird", Weight: 2.5, Height: 0.6)
    };

    return animals;
}

3. Implement the methods in the Katas class

4. Check you answers running

dotnet build
dotnet test

Katas description

CountAllAnimals

Returns the total count of all animals in the given collection.

GetAllMammals

Retrieves all animals of type “Mammal” from the given collection.

GetDuplicatedAnimalName

Returns the name of any animal that appears more than once in the given collection. If no duplicates exist, returns null.

GetFirstBirdNameOrderByName

Retrieves the name of the first bird, ordered alphabetically by name, from the given collection.

GetHeaviestAnimalName

Returns the name of the heaviest animal in the given collection.

GetTheSmallestAnimalName

Returns the name of the smallest animal in terms of height in the given collection.

GetAverageWeightOfReptiles

Calculates and returns the average weight of all reptiles in the given collection.

GetTotalWeightOfAllReptiles

Calculates and returns the total weight of all reptiles in the given collection.

GetAllReptileNames

Retrieves the names of all reptiles in the given collection.

GetTallestAnimalName

Returns the name of the tallest animal in the given collection.

GetNamesOfAnimalsHeavierThan

Retrieves the names of all animals in the given collection that are heavier than a specified weight.

GetCountOfEachAnimalType

Returns a dictionary where the keys are animal types and the values are the counts of each type in the given collection.

GetAllAnimalNamesWhichNameLengthIsFive

Retrieves the names of all animals in the given collection whose name length is exactly five characters.

GetTop3NamesOfAnimalsOrderedByWeightDescending

Retrieves the names of the top 3 heaviest animals in the given collection, ordered by weight in descending order.

GetBirdsNamesInDescendingOrder

Retrieves the names of all birds in the given collection, ordered by name in descending order and separated by commas.

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