FAQ: LINQ - LINQ with Other Collections

Frequently Asked Questions ASP.NET FAQ
1

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This community-built FAQ covers the “LINQ with Other Collections” exercise from the lesson “LINQ”.

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This exercise can be found in the following Codecademy content:

Build Web Apps with ASP.NET

FAQs on the exercise LINQ with Other Collections

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2

Hey, for some reason this code didn’t pass, even though it did what was required:
var dotSeven = from x in heroesList
where x.Contains(".")||x.Contains(“7”)
select x;

3

Hey,
I also had frustrations discovering that Codecademy wants us to write this one in a single Method syntax (even though the provided example uses Query syntax, which is kind of confusing).

Here is the correct solution, the lines that are commented out are an alternative using Query syntax:

using System;
using System.Collections.Generic;
using System.Linq;

namespace LearnLinq
{
  class Program
  {
    static void Main()
    {
      List<string> heroesList = new List<string> { "D. Va", "Lucio", "Mercy", "Soldier 76", "Pharah", "Reinhardt" };

      /*var periodOrSeven = from h in heroesList
        where h.Contains(".") || h.Contains("7")
        select h;*/

      var periodOrSeven = heroesList
        .Where(x => x.Contains(".") || x.Contains("7"));

      foreach (string x in periodOrSeven)
      {
        Console.WriteLine(x);
      }

    }
  }
}
3 Likes
4

Yeah, first I used query syntax which was not necessary. I think Codecademy recommends that I use method syntax when the thing that I am selecting doesn’t get changed by select which or there is no need for where.

1 Like