43 lines
1.7 KiB
Ruby
43 lines
1.7 KiB
Ruby
module ActiveSupport #:nodoc:
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module CoreExtensions #:nodoc:
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module Array #:nodoc:
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module RandomAccess
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# This method is deprecated because it masks Kernel#rand within the Array class itself,
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# which may be used by a 3rd party library extending Array in turn. See
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#
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# https://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/4555
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#
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def rand # :nodoc:
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ActiveSupport::Deprecation.warn 'Array#rand is deprecated and will be removed in Rails 3. Use Array#sample instead', caller
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sample
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end
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# Returns a random element from the array.
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def random_element # :nodoc:
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ActiveSupport::Deprecation.warn 'Array#random_element is deprecated and will be removed in Rails 3. Use Array#sample instead', caller
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sample
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end
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# Backport of Array#sample based on Marc-Andre Lafortune's http://github.com/marcandre/backports/
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def sample(n=nil)
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return self[Kernel.rand(size)] if n.nil?
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n = n.to_int
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rescue Exception => e
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raise TypeError, "Coercion error: #{n.inspect}.to_int => Integer failed:\n(#{e.message})"
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else
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raise TypeError, "Coercion error: #{n}.to_int did NOT return an Integer (was #{n.class})" unless n.kind_of? ::Integer
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raise ArgumentError, "negative array size" if n < 0
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n = size if n > size
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result = ::Array.new(self)
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n.times do |i|
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r = i + Kernel.rand(size - i)
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result[i], result[r] = result[r], result[i]
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end
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result[n..size] = []
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result
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end unless method_defined? :sample
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end
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end
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end
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end
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