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How To Display Message When Collection Is Empty
>> for i in [1] >> puts i >> end.any? or puts "empty!" 1 => true >> for i in [ ] >> puts i >> end.any? or puts "empty!" empty! => nil
short circuit evaluation is not intutitive? try this.
>> class Array
>> alias :__empty? :empty?
>> def empty?
>> yield if __empty? and block_given?
>> __empty?
>> end
>> end
=> nil
>> for i in [1]
>> puts i
>> end.empty? { puts "empty!" }
1
=> false
>> for i in [ ]
>> puts i
>> end.empty? { puts "empty!" }
empty!
=> true
