irb(main):001:0> class Array irb(main):002:1> def filter(&block) irb(main):003:2> self.select(&block) irb(main):004:2> end irb(main):005:1> end => :filter irb(main):006:0> [1, 2, 3].filter(&:even?) => [2]
irb(main):001:0> class Array irb(main):002:1> def filter(&block) irb(main):003:2> self.select(&block) irb(main):004:2> end irb(main):005:1> end => :filter irb(main):006:0> [1, 2, 3].filter(&:even?) => [2]
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