新手问题 sprintf 格式化四舍五入的坑？

Jao · January 17, 2018 · Last by tinyfeng replied at January 18, 2018 · 3216 hits

irb(main):009:0> sprintf("%.6f",1.2355235) => "1.235523"

irb(main):010:0> sprintf("%.6f",1.2355236) => "1.235524"

很像前台 to_Fixed 四舍六入五成双有没有好的解决方法？

Jao #1 January 17, 2018

irb(main):013:0> sprintf("%.6f",1.2355235) => "1.235523" irb(main):014:0> sprintf("%.6f",2.2355235) => "2.235524" 这次更诧异

luikore #2 January 17, 2018

"#{1.2355236.round 6}"

tinyfeng #3 January 18, 2018

进度损失，转化为整数四舍五入再转化为小数就不会出现这个问题。

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