How to sort string characters in alphabetical order?

Question

For an array, there is a nice sort method to change the sequence of elements. I want to achieve the same results for a string.

For example, I have a string str = "String" , I want to sort it alphabetically with one simple method to "ginrSt" .

Is there my own way to enable this, or should I include mixins from Enumerable ?

Answer 1

The chars method returns the numbering of string characters.

 str.chars.sort.join #=> "Sginrt" 

To sort case insensitively:

 str.chars.sort(&:casecmp).join #=> "ginrSt" 

Answer 2

Also (just for fun)

 str = "String" str.chars.sort_by(&:downcase).join #=> "ginrSt" 

Answer 3

 str.unpack("c*").sort.pack("c*") 

Answer 4

You can convert a string to an array for sorting:

 'string'.split('').sort.join