Contents

module Enumerable
  # Returns a new array with the element at _index_ replaced by the result of
  # running _block_ on that element.
  def map_at(index, &block)
    fail IndexError if index < 0 || index >= size
    each_with_index.map { |e, i| i == index ? block.call(e) : e }
  end
end

Version data entries

9 entries across 9 versions & 1 rubygems

Version	Path
metamorpher-0.2.6	lib/metamorpher/support/map_at.rb
metamorpher-0.2.5	lib/metamorpher/support/map_at.rb
metamorpher-0.2.4	lib/metamorpher/support/map_at.rb
metamorpher-0.2.3	lib/metamorpher/support/map_at.rb
metamorpher-0.2.2	lib/metamorpher/support/map_at.rb
metamorpher-0.2.1	lib/metamorpher/support/map_at.rb
metamorpher-0.2.0	lib/metamorpher/support/map_at.rb
metamorpher-0.1.1	lib/metamorpher/support/map_at.rb
metamorpher-0.1.0	lib/metamorpher/support/map_at.rb