Flowdock
method

prepend_one

Importance_0
v6.1.3.1 - Show latest stable - 0 notes - Class: CallbackChain
prepend_one(callback) private

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# File activesupport/lib/active_support/callbacks.rb, line 589
          def prepend_one(callback)
            @callbacks = nil
            remove_duplicates(callback)
            @chain.unshift(callback)
          end
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