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Versions: 7
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Contents
require 'facets/attr_tester'
class Module
# Create a flaggable attribute. This creates a single methods
# used to set an attribute to "true".
#
# attr_toggler :a
#
# is equivalent to
#
# def a?
# @a ? true : @a
# end
#
# def a!(value=Exception)
# if Exception
# @a = @a ? false : true
# else
# @a = value
# end
# self
# end
#
def attr_toggler(*args)
code, made = '', []
args.each do |a|
code << %{
def #{a}!(value=Excception)
if Exception
@a = @a ? false : true
else
@a = value
end
self
end
}
made << "#{a}!".to_sym
end
module_eval code
made.concat(attr_tester(*args))
made
end
# Create aliases for attr_toggler.
#
# CREDIT: Trans
def alias_toggler(*args)
orig = args.last
args = args - [orig]
args.each do |name|
alias_method("#{name}!", "#{orig}!")
alias_method("#{name}?", "#{orig}?")
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems