counting words

[Brad Anderson]

On Friday, 28 June 2013 at 16:04:35 UTC, Benjamin Thaut wrote:
> I'm currently making a few tests with std.algorithm, std.range, 
> etc
>
> I have a arry of words. Is it possible to count how often each 
> word is contained in the array and then sort the array by the 
> count of the individual words by chaining ranges? (e.g. without 
> using a foreach loop + hashmap)?

If you don't mind sorting twice:

words.sort()
      .group()
      .array()
      .sort!((a, b)=> a[1] > b[1])
      .map!(a => a[0])
      .copy(words);

You could also do it with a hashmap to keep the count.