ruby酷酷的方法——另一種next

irb(main):022:0* 1.next=> 2irb(main):023:0> "a".next=> "b"irb(main):024:0> "1".next=> "2"irb(main):025:0>

效能比較：

require 'benchmark'n=(1..1000000).to_adef num_next(first,last)    while first != last            first=first.next    end    enddef num_join(first,last)        while first != last              first+=1        endendBenchmark.bm do |bm|    bm.report("each") do         n.each do |d|            d        end    end    bm.report("next") do         num_next(1,1000000)    end    bm.report("  + ") do         num_join(1,1000000)    endend

 

輸出：      user     system      total        realeach  0.219000   0.000000   0.219000 (  0.218000)next  0.266000   0.000000   0.266000 (  0.266000)  +   0.312000   0.000000   0.312000 (  0.313000)

 效能還不錯，向ruby脫帽致敬！！