timuruski/mutable_default.py

Created September 2, 2011 17:46

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Ruby and Python handle mutable arguments differently, inspired by http://blog.extracheese.org/2006/12/pythons-default-arguments-are-tricky.html

Raw

mutable_default.py

	def foo(d=[]):
	d.append('a')
	return d

	print foo() # => ['a']
	print foo() # => ['a', 'a']
	print foo() # => ['a', 'a', 'a']

Raw

mutable_default.rb

	def foo(d=[])
	d << 'a'
	end

	p foo # => ["a"]
	p foo # => ["a"]
	p foo # => ["a"]

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