each_with_index

each_with_index(which = :all)

Instance Public methods

Same as each, but the row index and column index in addition to the element

Matrix[ [1,2], [3,4] ].each_with_index do |e, row, col|
  puts "#{e} at #{row}, #{col}"
end
  # => Prints:
  #    1 at 0, 0
  #    2 at 0, 1
  #    3 at 1, 0
  #    4 at 1, 1

Links:

https://github.com/ruby/ruby/blob/9a912c66d4f720e90c3522d40ac29c04dbd86a9b/lib/matrix.rb#L465

doc_ruby_on_rails

2015-04-18 07:16:50

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