Class: Hash

Inherits:
Object
  • Object
show all
Defined in:
lib/squire/core_ext/hash/deep_merge.rb

Overview

TODO: Wait for this pull to be merged and released in new version of ActiveSupport. github.com/rails/rails/pull/12072

Instance Method Summary collapse

Instance Method Details

#deep_merge(other_hash, &block) ⇒ Object

Returns a new hash with self and other_hash merged recursively.

h1 = {x: {y: [4,5,6]}, z: [7,8,9]}
h2 = {x: {y: [7,8,9]}, z: "xyz"}

h1.deep_merge(h2) #=> {:x => {:y => [7, 8, 9]}, :z => "xyz"}
h2.deep_merge(h1) #=> {:x => {:y => [4, 5, 6]}, :z => [7, 8, 9]}
h1.deep_merge(h2) { |key, old, new| Array.wrap(old) + Array.wrap(new) }
#=> {:x => {:y => [4, 5, 6, 7, 8, 9]}, :z => [7, 8, 9, "xyz"]}



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# File 'lib/squire/core_ext/hash/deep_merge.rb', line 14

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

#deep_merge!(other_hash, &block) ⇒ Object

Same as deep_merge, but modifies self.



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# File 'lib/squire/core_ext/hash/deep_merge.rb', line 19

def deep_merge!(other_hash, &block)
  other_hash.each_pair do |k,v|
    tv = self[k]

    if tv.is_a?(Hash) && v.is_a?(Hash)
      self[k] = tv.deep_merge(v, &block)
    else
      self[k] = block ? block.call(k, tv, v) : v
    end
  end
  self
end