I would like to sort my list of strings by their length in place
var weasleys = new List<string>{"Bill", "Charlie", "Percy", "Fred", "George", "Ron", "Ginny"};
I know how to do it with OrderBy, but this returns a copy.
weasleys.OrderBy(x => x.Length)
I would prefer to sort in place with List<T>.Sort. How?
There's a Sort(Comparison<T>) overload that takes a Comparison<T> delegate. With that, you can just use the CompareTo method on the respective Length values:
weasleys.Sort((x, y) => x.Length.CompareTo(y.Length));
Note that unlike the LINQ OrderBy method, the Sort will alter your weasleys List in-place if that is your intent.
You can do this with Array List...
public class SortStringLength : IComparer
{
public int Compare(Object s1, Object s2)
{
if (s1.ToString().Length == s2.ToString().Length)
return String.CompareOrdinal(s1.ToString(), s2.ToString());
if (s1.ToString().Length > s2.ToString().Length)
return 1;
return -1;
}
}
And, then to use the IComparer...
static void Main(string[] args)
{
var weasleys = new ArrayList { "Bill", "Charlie", "Percy",
"Fred", "George", "Ron", "Ginny" };
var sortLength = new SortStringLength();
weasleys.Sort(sortLength);
foreach (var weasley in weasleys)
{
Console.WriteLine(weasley);
}
Console.ReadLine();
}
With List...
public class SortStringLength : IComparer<string>
{
public int Compare(string x, string y)
{
if (x.Length == y.Length)
return String.CompareOrdinal(x, y);
if (x.Length > y.Length)
return 1;
return -1;
}
}
and usage...
static void Main(string[] args)
{
var weasleys = new List<string> { "Bill", "Charlie", "Percy",
"Fred", "George", "Ron", "Ginny" };
var sortLength = new SortStringLength();
weasleys.Sort(sortLength);
foreach (var weasley in weasleys)
{
Console.WriteLine(weasley);
}
Console.ReadLine();
}
This should do it
var weasleys = new List<string>{"Bill", "Charlie", "Percy", "Fred", "George", "Ron", "Ginny"};
var t = weasleys.OrderBy(x => x.Length).ToList<string>();
using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;
public class Program
{
public static void Main()
{
List<string> dictionary = new List<string>() { "aaa", "aaaa", "a", "aa" };
var orderedDic = dictionary.Select(x => new
{
val = x,
length = x.Length
}).OrderBy(x => x.length).ToList();
dictionary = orderedDic.Select(x => x.val).ToList();
Console.WriteLine(string.Join(",", dictionary));
}
}
The approach which I have used here
Tclass.