将 Ruby 中的持续时间 - hh:mm:ss.sss 转换为毫秒，反之亦然 [英] Convert durations in Ruby - hh:mm:ss.sss to milliseconds and vice versa

问题描述

我想知道 Ruby 中是否有一个内置方法可以让我将 hh:mm:ss.sss 格式的单圈时间转换为毫秒，反之亦然.由于我需要用它做一些计算，我认为转换为毫秒是最简单的方法.如果我错了，请告诉我:)

I was wondering if there is a built-in method in Ruby that allows me to convert lap times in the format of hh:mm:ss.sss to milliseconds and vice versa. Since I need to do some calculations with it, I assumed that converting to milliseconds would be the easiest way to do this. Tell me if I am wrong here :)

推荐答案

这个怎么样?

a=[1, 1000, 60000, 3600000]*2
ms="01:45:36.180".split(/[:\.]/).map{|time| time.to_i*a.pop}.inject(&:+)
# => 6336180
t = "%02d" % (ms / a[3]).to_s << ":" << 
    "%02d" % (ms % a[3] / a[2]).to_s << ":" << 
    "%02d" % (ms % a[2] / a[1]).to_s << "." << 
    "%03d" % (ms % a[1]).to_s
# => "01:45:36.180"

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