Class: Object

Inherits:
BasicObject
Defined in:
lib/funtools/recursion.rb

Instance Method Summary collapse

Instance Method Details

#deftail(sym, &block) ⇒ Object

Public: Define a method in the current scope which will execute a given block recursively until a fixpoint is reached.

sym - Symbol defining the name of the method to be created. block - Block containing the logic for the function to be created.

Returns nothing.



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# File 'lib/funtools/recursion.rb', line 11

def deftail(sym, &block)
  self.send(:define_method, sym) do |*n|
    last = nil
    [1].cycle.reduce(n) { |c, e| break c if last == c; last = c; block[c] }
  end
end