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