Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/utilities/hash.rb

Instance Method Summary collapse

Instance Method Details

#deep_deep_merge(other_hash, &block) ⇒ Object

Returns a new hash with self and other_hash merged recursively.

h1 = { a: true, b: { c: [1, 2, 3] } }
h2 = { a: false, b: { x: [3, 4, 5] } }

h1.deep_merge(h2) # => { a: false, b: { c: [1, 2, 3], x: [3, 4, 5] } }

Like with Hash#merge in the standard library, a block can be provided to merge values:

h1 = { a: 100, b: 200, c: { c1: 100 } }
h2 = { b: 250, c: { c1: 200 } }
h1.deep_merge(h2) { |key, this_val, other_val| this_val + other_val }
# => { a: 100, b: 450, c: { c1: 300 } }



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# File 'lib/utilities/hash.rb', line 16

def deep_deep_merge(other_hash, &block)
  dup.deep_deep_merge!(other_hash, &block)
end

#deep_deep_merge!(other_hash, &block) ⇒ Object

Same as deep_merge, but modifies self.



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# File 'lib/utilities/hash.rb', line 21

def deep_deep_merge!(other_hash, &block)
  other_hash.each_pair do |current_key, other_value|
    this_value = self[current_key]

    self[current_key] = if this_value.is_a?(Hash) && other_value.is_a?(Hash)
      this_value.deep_deep_merge(other_value, &block)
    else
      if block_given? && key?(current_key)
        block.call(current_key, this_value, other_value)
      else
        other_value
      end
    end
  end

  self
end

#except(*keys) ⇒ Object 



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# File 'lib/utilities/hash.rb', line 39

def except(*keys)
  dup.except!(*keys)
end

#except!(*keys) ⇒ Object 



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# File 'lib/utilities/hash.rb', line 43

def except!(*keys)
  keys.each { |key| delete(key) }
  self
end