名单 <string> 不排序

Question

The string is returned the same as it enters the function:

  public static string AlphaSort(string S)
      {
        var NewS = new List<string>();
        var Arr = S.Replace(" ", "").Split();
        NewS = Arr.ToList();
        var SortedS = NewS.OrderBy(c => c).ToList();
        return String.Join("", SortedS.ToArray());
      }

I have also tried NewS.Sort() to no avail

Answer 1

I think you're overthinking things. Try something like:

public static string AlphaSort( string s )
{
  string sorted = string.Join( "" ,
                    ( s ?? "")
                    .Split()
                    .OrderBy( x => x )
                    ) ;
  return sorted ;
}

which turns this string

"The    Quick Brown Fox      Jumped Over      The Lazy      Dog"

into this string

"BrownDogFoxJumpedLazyOverQuickTheThe"

If you're trying to order the individual characters, it gets much easier. A string is an IEnumerable<char> (very convenient). It's also readily convertable to a char[] (since that's ultimately its backing store). In this case, something like

public static string AlphaSort( string s )
{
  string sorted = new string(
                    (s ?? "")
                    .Where( c => !char.IsWhiteSpace(c) )
                    .OrderBy( c => c )
                    );
  return sorted ;
}

Given the input noted above,

"The    Quick Brown Fox      Jumped Over      The Lazy      Dog"

this produces the string

"BDFJLOQTTacdeeeeghhikmnoooprruuvwxyz"

One might note that once you're looking at characters, the ordering is no longer really alphabetic. Rather, it's an ordinal sort, since a char is an unsigned short.

Here's another approach

public static string AlphaSort( string s )
{
  char[] chars = s.ToCharArray() ;

  Array.Sort( chars ) ;

  int i = 0 ;
  while ( i < chars.Length && char.IsWhiteSpace(chars[i]) ) ++i ;

  string sorted = new string( chars , i , chars.Length-i ) ;
  return sorted ;
}

producing the same

"BDFJLOQTTacdeeeeghhikmnoooprruuvwxyz"

from

"The    Quick Brown Fox      Jumped Over      The Lazy      Dog"

Cheers!

Answer 2

I think you're trying to take a string and return the characters alphabetically. If so, try this

public static string AlphaSort(string S)
{
    var Arr = S.Replace(" ", "").ToCharArray();
    var SortedS = Arr.OrderBy(c => c);
    return String.Join("", SortedS);
}

Answer 3

public static string AlphaSort(string S)
  {        
    var Arr = S.Replace(" ", "").Split(' ');
    var NewS = Arr.ToList();
    var SortedS = NewS.OrderBy(c => c).ToList();
    return String.Join("", SortedS.ToArray());
  }

or simply you could use without using Replace:

var Arr = S.Split(new char[] {' '}, StringSplitOptions.RemoveEmptyEntries)

Answer 4

This will return the string sorted case insensitive

public static string AlphaSort(string S)
{
    string[] NewS = S.Split(' ');
    Array.Sort(NewS, new CaseInsensitiveComparer());
    return String.Join(" ", NewS);
}