Module: HashExtensions

Defined in:
lib/hash_extensions.rb

Overview

This code is by Avdi Grim. You can find the origin at his blog post devblog.avdi.org/2009/11/20/hash-transforms-in-ruby/

Instance Method Summary collapse

Instance Method Details

#deep_stringify_keys ⇒ Object

Convert keys to strings, recursively



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# File 'lib/hash_extensions.rb', line 38

def deep_stringify_keys
  transform_hash(:deep => true) do |hash, key, value|
    hash[key.to_s] = value
  end
end

#stringify_keys ⇒ Object

Convert all keys in the hash to strings



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# File 'lib/hash_extensions.rb', line 31

def stringify_keys
  transform_hash do |hash, key, value|
    hash[key.to_s] = value
  end
end

#transform_hash(options = {}, &block) ⇒ Hash

Transform all elements of a hash

rubocop:disable CaseEquality, ElseAlignment, EndAlignment, IndentationWidth, BlockAlignment, EachWithObject

Parameters:

  • options (Hash) (defaults to: {}) —

    the options for the transform.

  • block (Proc) —

    proc to yield

Returns:

  • (Hash) —

    the transformed hash



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# File 'lib/hash_extensions.rb', line 15

def transform_hash(options = {}, &block)
   inject({}) do |result, (key, value)|
    value = if options[:deep] && Hash === value
      transform_hash(value, options, &block)
    else
      value
    end
    block.call(result, key, value)
    result
  end
end