Sorting a Hash Recursively with Ruby

As part of Diffing Pretty-Printed JSON Files, I wanted to have a method of making JSON documents easier to diff by sorting their keys.

I wanted to use this solution by Brian Dunagan, but it didn't seem to quite work when, in my example, I had an Arrays which may have Hashes but may also not.

My amended solution is:

def recursive_sort(v, &block)
  if v.class == Hash
  elsif v.class == Array
    v.collect {|a| recursive_sort(a, &block)}

class Hash
  def sorted_hash(&block)
      self.each do |k,v|
        self[k] = recursive_sort(v, &block)

Written by Jamie Tanna's profile image Jamie Tanna on , and last updated on .

Content for this article is shared under the terms of the Creative Commons Attribution Non Commercial Share Alike 4.0 International, and code is shared under the Apache License 2.0.

#blogumentation #ruby.

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