02 - 02 C# Iteration - Working with LINQ

[aksnell]

Learning programming takes practice and the best practice is repetition. This exercise will allow you time to work on the basics of .NET and how to apply that logic to solving problems.

Objectives

After completing this assignment, you should be able to:

• Demonstrate understanding of iteration/enumeration

Instructions

1. Fork this repository to your own account.
2. Change into your projects directory:
3. Clone your repository: git clone https://github.com/YOUR_NAME_HERE/net-iteration
4. Change into your project's directory: cd net-iteration
5. Install the dependencies: dotnet restore
6. Open in your editor: code .
7. Start the test runner: dotnet watch test
8. Open Iterations.cs and work on functions until the test passes. Once you are done with a test you can move to the next one by removing the (Skip = "Remove to run test") from the Fact attribute. There are a total of 10 questions.
9. Commit and push your work to GitHub.
10. Turn in the URL to your GitHub repo.

Explorer Mode

• All tests passing
• No linter warnings
• Turn in the homework using the URL to your repository on GitHub.

Additional Resources

Reference the documentation to find what kind of helpful functions might already be in C#.

• String Functions.
• Official LINQ

[aksnell]

https://github.com/aksnell/net-iteration

[gstark]

This

            return data.Select((str, index) => str + $" is at index {index}");

can be

            return data.Select((str, index) => $"{str} is at index {index}");

If you are already using string interpolation, use it for both variables.

Also, no str variable names please.

            return data.Select((str, index) => new { str = str, index = index}).First(selected => selected.str.Contains("needle")).index;

Nicely done. (also no str variables pleas) - However, this would be easier using FindIndex -- we did not cover it in class or the reading, but it is a method on List that uses an expression and returns the index of the found match. https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.list-1.findindex?view=netcore-3.1

[aksnell]

Your homework 02 - 02 C# Iteration - Working with LINQ was marked: Meets Expectations

“Well done!” — via Gavin Stark