Extract array in place : Array Extension « Array « Ruby

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Ruby » Array » Array Extension   Extract array in place class Array   def extract!     ary = self.dup     self.reject! { |x| yield x }     ary - self   end end p a = ("a".."h").to_a p a.extract! { |x| x < "e" && x != "b" }     # => ["a", "c", "d"] p a                # => ["b", "e", "f", "g", "h"]   Related examples in the same category 1.  Add your method to system data type 2.  Add a new method to Array class 3.  Add shuffle method to Array class 4.  strip values from array 5.  Array cartesian 6.  Add method to Array class to convert an array to a hash 7.  each from both sides 8.  Extends array comparsion method 9.  Override array method 10.  Add new operator for Array 11.  Add subset and superset operator for Array 12.  Set permutation for Array 13.  Resequence the array 14.  Use hash to count elements in an array 15.  convert array to a hash

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