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class Object
# "", " ", nil, [], and {} are blank
def blank? #:nodoc:
if respond_to?(:empty?) && respond_to?(:strip)
empty? or strip.empty?
elsif respond_to?(:empty?)
empty?
else
!self
end
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?
empty? || strip.empty?
end
end
class Numeric #:nodoc:
def blank?
false
end
end
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