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|
class Object
# An object is blank if it's nil, empty, or a whitespace string.
# For example, "", " ", nil, [], and {} are blank.
#
# This simplifies
# if !address.nil? && !address.empty?
# to
# if !address.blank?
def blank?
respond_to?(:empty?) ? empty? : !self
end
end
class NilClass #:nodoc:
def blank?
true
end
end
class FalseClass #:nodoc:
def blank?
true
end
end
class TrueClass #:nodoc:
def blank?
false
end
end
class Array #:nodoc:
alias_method :blank?, :empty?
end
class Hash #:nodoc:
alias_method :blank?, :empty?
end
class String #:nodoc:
def blank?
self !~ /\S/
end
end
class Numeric #:nodoc:
def blank?
false
end
end
|
