method

new

v3.1.0 - Show latest stable - 0 notes - Class: ActiveSupport::OrderedHash

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What's this?

new(*args, &block) public

In MRI the Hash class is core and written in C. In particular, methods are programmed with explicit C function calls and polymorphism is not honored.

For example, []= is crucial in this implementation to maintain the @keys array but hash.c invokes rb_hash_aset() originally. This prevents method reuse through inheritance and forces us to reimplement stuff.

For instance, we cannot use the inherited #merge! because albeit the algorithm itself would work, our []= is not being called at all by the C code.

Show source

# File activesupport/lib/active_support/ordered_hash.rb, line 63
      def initialize(*args, &block)
        super
        @keys = []
      end

new

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