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##
# Extending String function to be able to convert a String 'true' or 'false' to a boolean true/false.
# See the Boolean module for usage
#
class String
def to_bool
(self =~ /^true$/i) == 0
end
end
##
# Implementing to_bool operation that returns self.
# See the Boolean module for usage
#
class TrueClass
def to_bool
self
end
end
##
# Implementing to_bool operation that returns self.
# See the Boolean module for usage
#
class FalseClass
def to_bool
self
end
end
##
# Implementing to_bool operation that returns self.
# See the Boolean module for usage
#
class NilClass
def to_bool
self
end
end
##
# The main application of the Boolean module is to
# support reading boolean values from a String (e.g.
# while reading a configuration value) and having the
# ability to convert it back to a boolean true/false
# for easier evaluation in your Ruby code
#
# == Usage
#
# Working with Boolean module can be very simple, for example:
#
# require 'toolbox/boolean'
#
# list_of_values = [
# 'true',
# 'True',
# 'TRUE',
# 'false',
# 'False',
# 'FALSE',
# nil,
# ]
#
# list_of_values.each do |string|
# puts "This evaluated to true" if string.to_bool
# puts "This evaluated to false or was nil" unless string.to_bool
# end
#
module Boolean
end
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6 entries across 6 versions & 1 rubygems