Method: Object#list

Defined in:
lib/funtools/cons.rb

#list(first, second = nil, *rest) ⇒ Object

Public: Construct a list of nested Cons cells.

first - Any Object to be the leftmost element of the list. second - Any Object to be the second element of the list (default: nil). rest - Any number of Objects to serve as elements in the list.

Returns a list (nested Cons cells).



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# File 'lib/funtools/cons.rb', line 19

def list(first, second = nil, *rest)
  set = (rest.empty? && second.nil?) ? [] : rest + [nil]
  ([first, second] + set).reverse.reduce { |c, e| Cons.new(e, c) }
end