module ArrayHelpers

Public Instance Methods

in_two() click to toggle source
# File lib/nswtopo/helpers/array.rb, line 14
def in_two
  each_slice(1 + [length - 1, 0].max / 2)
end
many?() click to toggle source
# File lib/nswtopo/helpers/array.rb, line 10
def many?
  length > 1
end
mean() click to toggle source
# File lib/nswtopo/helpers/array.rb, line 6
def mean
  empty? ? nil : inject(&:+) / length
end
median() click to toggle source
# File lib/nswtopo/helpers/array.rb, line 2
def median
  sort[length / 2]
end
nearby_pairs(closed = false, &block) click to toggle source
# File lib/nswtopo/helpers/array.rb, line 18
def nearby_pairs(closed = false, &block)
  Enumerator.new do |yielder|
    each.with_index do |element1, index|
      (closed ? rotate(index) : drop(index)).drop(1).each do |element2|
        break unless block.call [element1, element2]
        yielder << [element1, element2]
      end
    end
  end
end