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vendor/rails/activesupport/lib/active_support/core_ext/range/overlaps.rb

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module ActiveSupport #:nodoc:

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  module CoreExtensions #:nodoc:

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    module Range #:nodoc:

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      # Check if Ranges overlap.

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      module Overlaps

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        # Compare two ranges and see if they overlap eachother

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        #  (1..5).overlaps?(4..6) # => true

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        #  (1..5).overlaps?(7..9) # => false

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        def overlaps?(other)

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          include?(other.first) || other.include?(first)

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        end

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      end

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    end

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  end

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end

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