Created
December 21, 2013 19:14
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| 2.0.0p247 :012 > [nil,2,3].lazy.map { |x| | |
| puts "evaluating #{x}. This could be expensive" | |
| x ? x * 10 : x | |
| }.detect { |x| | |
| x && x >= 20 | |
| } | |
| evaluating . This could be expensive | |
| evaluating 2. This could be expensive | |
| => 20 |
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