I have a constructor with 2 (double) arrays members :
constructor[i].x and constructor[i].y ( where i is the number of elements )
How can I sort the x member : constructor[].x ?
3
-
3Please paste real code (including any attempts along with the reason for why they didn't work). There is no "Constructor" here, except for the name.user166390– user1663902012-04-22 18:07:42 +00:00Commented Apr 22, 2012 at 18:07
-
See stackoverflow.com/questions/1301822/… It's not an in-place Array sort, but it'll work in most cases. Or see the Array.Sort documentation.user166390– user1663902012-04-22 18:09:11 +00:00Commented Apr 22, 2012 at 18:09
-
(It would be interesting to see answers that shows use of Array.Sort, perhaps in addition to LINQ approaches. All the answers I could find on SO in my brief search were related to LINQ/IEnumerable and not specifically an Array. The benefit, and crutch, of Array.Sort is that it is mutating.)user166390– user1663902012-04-22 18:16:24 +00:00Commented Apr 22, 2012 at 18:16
Add a comment
|
1 Answer
With LINQ it is just
constructor = constructor.OrderBy(a => a.x).ToArray();
Without LINQ
class CustomClass
{
public double x;
public double y;
}
public class CustomComparer : IComparer<CustomClass>
{
private CustomComparer() { }
public static CustomComparer Instance { get { return _SingeltonInstance; } }
private static CustomComparer _SingeltonInstance = new CustomComparer();
public int Compare(CustomClass a, CustomClass b)
{
return a.x.CompareTo(b.x);
}
}
public class myCode
{
public void SomeFuction(CustomClass[] myClass)
{
//myClass is unsorted here;
Array.Sort(myClass, CustomComparer.Instance);
//myClass is sorted here;
}
}
answered Apr 22, 2012 at 18:09
4 Comments
That's not LINQ. LINQ (IEnumerable) uses OrderBy. There is, however,
static Array.Sort and List.Sort.
Scott Chamberlain
@pst this was typed from memory from my phone. Corrected.
Scott Chamberlain
Added a version that did not use any .NET 4 (LINQ) stuff