如何在Lua中将ISO 8601持续时间转换为秒或毫秒? [英] How would I convert ISO 8601 durations into a seconds or milliseconds in Lua?

问题描述

我需要实现一个lua函数，以将ISO 8601中的时间格式转换为秒或毫秒，Lua中是否有任何内置库，或者我们必须实现? ISO 8601格式的示例:

I need to implement a lua function to convert the time format in ISO 8601 to seconds or milliseconds, is there any built-in libraries available in Lua or we have to implement? Examples for ISO 8601 format :

PT1S, PT0.010S, PT0.001S---> to seconds or milliseconds.

推荐答案

下面的代码转换PTxxxS形式的字符串:

The code below converts strings of the form PTxxxS:

s="PT0.001S"
print(tonumber(s:match("PT([%d.]+)S")))

通常，此代码将持续时间字符串解析为表格，然后可以轻松对其进行处理:

More generally, this code parses a duration string into a table, which you can then process easily:

s= "P3Y6M4DT12H30M5S" 
t = {Y=0, M=0, W=0, D=0, H=0, M=0, S=0}
for v,k in s:gmatch("([%d.,]+)(%u)") do
    t[k]=tonumber(v)
end

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