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swalkinshaw/tracked_hash.rb

Created July 21, 2017 19:22
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Ruby hash delegator that tracks which keys were accessed
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tracked_hash.rb
class TrackedHash < SimpleDelegator
attr_reader :accessed_keys
def initialize(hash)
super
@accessed_keys = Set.new
end
def [](key)
@accessed_keys << key
super
end
def fetch(*args)
@accessed_keys << args[0]
super
end
end
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