strip values from array : Array Extension « Array « Ruby






  1. Ruby
  2. Array
  3. Array Extension

strip values from array


class Array
  def strip_values_at!(*args)
    args.each do |x|
      #For each mentioned index, replace its value with a dummy object.
      values = []
      dummy = Object.new
      args.each do |i|
        if i < size
          values << self[i]
          self[i] = dummy
        end
      end
      #Strip out the dummy object.
      delete(dummy)
      return values
    end
  end
end

p a = ("a".."h").to_a
p a.strip_values_at!(1, 0, -2)            # => ["b", "a", "g"]
p a                                       # => ["c", "d", "e", "f", "h"]

p a.strip_values_at!(1000)                # => []
p a                                       # => ["c", "d", "e", "f", "h"]








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