module Enumerable

Public Instance Methods

jostle(amount = 0.2) click to toggle source

# File lib/jocelyn/enumerable_methods.rb, line 2
def jostle(amount = 0.2)
  raise ArgumentError, 'amount must be between 0 and 1' \
    unless (0..1.0).cover?(amount)

  items = map.with_index(1) do |item, i|
    [item, (i * 1.0 / size) * (1.0 - amount) + rand * amount]
  end
  items.sort_by(&:last).map(&:first)
end