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Contents
=begin rdoc
= Ruby on Rails Core Extensions
provides .blank?
=end
unless Object.respond_to?(:blank?) #:nodoc:
# Check first to see if we are in a Rails environment, no need to
# define these methods if we are
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?
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
end
Version data entries
16 entries across 16 versions & 4 rubygems