class Array

# File lib/mumuki/domain/extensions/array.rb, line 2
def insert_last(element)
  self + [element]
end

# File lib/mumuki/domain/extensions/array.rb, line 19
def multiple?
  size > 1
end

# File lib/mumuki/domain/extensions/array.rb, line 23
def randomize_with(randomizer, seed)
  map { |it| it.randomize_with randomizer, seed }
end

# File lib/mumuki/domain/extensions/array.rb, line 6
def single
  first if single?
end

# File lib/mumuki/domain/extensions/array.rb, line 10
def single!
  raise 'There is more than one element' unless single?
  first
end

# File lib/mumuki/domain/extensions/array.rb, line 15
def single?
  size == 1
end