Splitting string into words length-based lists c#

Question

I have a string of words separated by spaces. How to split the string into lists of words based on the words length?

Example

inpu

Answer 1

First, let's declare a class that can hold a length as well as a list of words

public class WordList
{
    public int WordLength { get; set; }
    public List Words { get; set; }
}

Now, we can build a list of word lists with

string input = " aa aaa aaaa bb bbb bbbb cc ccc cccc ";
string[] words = input.Trim().Split();
List list = words
    .GroupBy(w => w.Length)
    .OrderBy(group => group.Key)
    .Select(group => new WordList { 
        WordLength = group.Key, 
        Words = group.Distinct().OrderBy(s => s).ToList() 
    })
    .ToList();

The lists are sorted by length and aphabetically respectively.

---

Result

e.g.

list[2].WordLength ==> 4
list[2].Words[1] ==> "bbbb"

---

UPDATE

If you want, you can process the result immediately, instead of putting it into a data structure

string input = " aa aaa aaaa bb bbb bbbb cc ccc cccc ";

var query = input
    .Trim()
    .Split()
    .GroupBy(w => w.Length)
    .OrderBy(group => group.Key);

// Process the result here
foreach (var group in query) {
    // group.Key ==> length of words
    foreach (string word in group.Distinct().OrderBy(w => w)) {
       ...
    }
}