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The former is slightly more readable, performant and has fewer method calls. ```ruby Benchmark.ips do |x| x.report('times.map') { 5.times.map{} } x.report('Array.new') { Array.new(5){} } x.compare! end __END__ Calculating ------------------------------------- times.map 21.188k i/100ms Array.new 30.449k i/100ms ------------------------------------------------- times.map 311.613k (± 3.5%) i/s - 1.568M Array.new 590.374k (± 1.2%) i/s - 2.954M Comparison: Array.new: 590373.6 i/s times.map: 311612.8 i/s - 1.89x slower ``` |
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pattern.rb |