class ActiveSupport::OrderedHash
Public Instance Methods
insert_at_start(key,value)
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Insert a given element at the beginning, not end, of an ordered hash.
# File lib/core-extensions/ordered_hash.rb, line 17 def insert_at_start(key,value) replace(OrderedHash[self.to_a.insert(0,[key,value])]) end
stable_select(&block)
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Version of enumerable#select for an OrderedHash
which is order-preserving Output is an array of key-value pairs.
# File lib/core-extensions/ordered_hash.rb, line 11 def stable_select(&block) #Annoyingly, default ordered hash select is not stable self.map{|k,v| block.call(k,v) ? [k,v] : nil}.compact end