Welcome to the Treehouse Community
Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.
Start your free trialErica Cleary
14,077 PointsNeeding help with task 2 of Querying with LINQ
I'm not sure what I am doing wrong with this answer. Can someone please help?
The task states: 'Add a new method named ReverseNumbers that has a return type of IEnumerable<int> and uses a LINQ query to return the _numbers variable in reverse order.'
using System.Collections.Generic;
using System.Linq;
namespace Treehouse.CodeChallenges
{
public class NumberAnalysis
{
private List<int> _numbers;
public NumberAnalysis()
{
_numbers = new List<int> { 2, 4, 6, 8, 10 };
}
public IEnumerable<int> NumbersGreaterThanFive()
{
return _numbers.Where(n => n > 5);
}
public IEnumerable<int> ReverseNumbers()
{
return _numbers.OrderByDescending(n => n < 10);
}
}
}
3 Answers
Steven Parker
231,236 PointsThe new method should return all numbers in reverse order.
There's no need to compare the number to 10 (or to anything, for that matter).
Unlike the .Where() method which uses a function returning a boolean as an argument, the .OrderByDescending() method uses a function that simply returns a key.
Sara Rena Anderson
15,045 Pointsusing System.Collections.Generic;
using System.Linq;
namespace Treehouse.CodeChallenges
{
public class NumberAnalysis
{
private List<int> _numbers;
public NumberAnalysis()
{
_numbers = new List<int> { 2, 4, 6, 8, 10 };
}
public IEnumerable<int> NumbersGreaterThanFive()
{
return _numbers.Where(n => n > 5);
}
public IEnumerable<int> ReverseNumbers()
{
return _numbers.OrderByDescending(n => n );
}
}
}
Erica Cleary
14,077 PointsThank you, Steven! That fixed it!