Method: Enumerable#index_by

Defined in:
lib/passive_support/core_ext/enumerable.rb

#index_by ⇒ Object

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 ...>, ...}



92
93
94
95
96
97
 
# File 'lib/passive_support/core_ext/enumerable.rb', line 92

def index_by
  inject({}) do |accum, elem|
    accum[yield(elem)] = elem
    accum
  end
end