method

index_by

v2.3.8 - Show latest stable - 0 notes - Class: Enumerable

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What's this?

index_by() public

Convert an enumerable to a hash. Examples:

  people.index_by(&:login)
    => { "nextangle" => <Person ...>, "chade-" => <Person ...>, ...}
  people.index_by { |person| "#{person.first_name} #{person.last_name}" }
    => { "Chade- Fowlersburg-e" => <Person ...>, "David Heinemeier Hansson" => <Person ...>, ...}

Show source

# File activesupport/lib/active_support/core_ext/enumerable.rb, line 92
  def index_by
    inject({}) do |accum, elem|
      accum[yield(elem)] = elem
      accum
    end
  end

index_by

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