54 lines
724 B
Ruby
54 lines
724 B
Ruby
class Object
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# An object is blank if it's false, 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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#
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# if !address.nil? && !address.empty?
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#
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# to
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#
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# if !address.blank?
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def blank?
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respond_to?(:empty?) ? empty? : !self
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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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self !~ /\S/
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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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