instance method `update`

Ruby on Rails 8.0.4

Since v3.0.20

Available in: v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

update(*other_hashes, &block)

Updates the receiver in-place, merging in the hashes passed as arguments:

hash_1 = ActiveSupport::HashWithIndifferentAccess.new
hash_1[:key] = 'value'

hash_2 = ActiveSupport::HashWithIndifferentAccess.new
hash_2[:key] = 'New Value!'

hash_1.update(hash_2) # => {"key"=>"New Value!"}

hash = ActiveSupport::HashWithIndifferentAccess.new
hash.update({ "a" => 1 }, { "b" => 2 }) # => { "a" => 1, "b" => 2 }

The arguments can be either an ActiveSupport::HashWithIndifferentAccess or a regular Hash. In either case the merge respects the semantics of indifferent access.

If the argument is a regular hash with keys :key and "key" only one of the values end up in the receiver, but which one is unspecified.

When given a block, the value for duplicated keys will be determined by the result of invoking the block with the duplicated key, the value in the receiver, and the value in other_hash. The rules for duplicated keys follow the semantics of indifferent access:

hash_1[:key] = 10
hash_2['key'] = 12
hash_1.update(hash_2) { |key, old, new| old + new } # => {"key"=>22}

Parameters

other_hashes rest
block block

Source

# File activesupport/lib/active_support/hash_with_indifferent_access.rb, line 132
    def update(*other_hashes, &block)
      if other_hashes.size == 1
        update_with_single_argument(other_hashes.first, block)
      else
        other_hashes.each do |other_hash|
          update_with_single_argument(other_hash, block)
        end
      end
      self
    end

Defined in activesupport/lib/active_support/hash_with_indifferent_access.rb line 132 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveSupport::HashWithIndifferentAccess

Signature

Parameters