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class Symbol
# Turns the symbol into a simple proc, which is especially useful for enumerations. Examples:
#
# # The same as people.collect { |p| p.name }
# people.collect(&:name)
#
# # The same as people.select { |p| p.manager? }.collect { |p| p.salary }
# people.select(&:manager?).collect(&:salary)
#
# This is a builtin method in Ruby 1.8.7 and later.
def to_proc
Proc.new { |*args| args.shift.__send__(self, *args) }
end unless :to_proc.respond_to?(:to_proc)
end
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