Ruby 是否有 ISO-8601 日期解析的完整实现？

发布于 2024-09-17 17:45:29 字数 711 浏览 4 评论 0原文

Time.iso8601 方法是 ISO-8601 的受限子集。

它有什么局限性？
有谁知道 Ruby 的完整实现吗？我正在使用 MRI 1.8.7。

更新

看起来没有一个类可以处理所有各种 8601 日期和日期/时间组合。不过，我通过使用 Date.parse 和 Time.iso8601 方法成功解决了这些问题。缺点是您需要在代码中决定输入是否像日期或日期/时间。

警告：时区差异

Time.iso8601 和 Time.parse 的行为不同。

>> Time.parse("2010-09-06T12:27:00.10-05:00")
=> Mon Sep 06 18:27:00 +0100 2010

>> Time.iso8601("2010-09-06T12:27:00.10-05:00")
=> Mon Sep 06 17:27:00 UTC 2010

Time.iso8601 和 ISO-8601 之间的差异

本文档涉及两者之间的差异ISO-8601 以及 Ruby 支持的内容。简而言之，可能的格式数量是有限的。

原文

The Time.iso8601 method is a restricted subset of ISO-8601.

What are its limitations?
Does anyone know of a full implementation for Ruby? I'm using MRI 1.8.7.

Update

It looks like there isn't a single class that handles all of the various 8601 date and date/time combinations. However, I have managed to work around the problems by using both the Date.parse and Time.iso8601 methods. The downside is that you need to decide in code whether the input looks like a date or a date/time.

Warning : Timezone differences

Time.iso8601 and Time.parse behave differently.

>> Time.parse("2010-09-06T12:27:00.10-05:00")
=> Mon Sep 06 18:27:00 +0100 2010

>> Time.iso8601("2010-09-06T12:27:00.10-05:00")
=> Mon Sep 06 17:27:00 UTC 2010

Differences between Time.iso8601 and ISO-8601

This document touches on the differences between what is in ISO-8601 and what is supported by Ruby. The short answer is that the number of possible formats is restricted.

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许你一世情深 2024-09-24 17:45:29

是的，但不幸的是它是在 Ruby 1.9 中。

require "date"

Date.iso8601("2010-W32-5").strftime
#=> "2010-08-13"

我不相信 Ruby 1.8.7 有任何实现（或者至少我找不到）。您可以尝试升级到 Ruby 1.9，它从 1.9.2 开始就相当稳定。或者，您可以尝试自己解析日期。

Yes, but unfortunately it's in Ruby 1.9.

require "date"

Date.iso8601("2010-W32-5").strftime
#=> "2010-08-13"

I don't believe there are any implementations for Ruby 1.8.7 (or at least I couldn't find any). You could either try to upgrade to Ruby 1.9, which is pretty stable as of 1.9.2. Alternatively, you could try to parse the dates yourself.

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剪不断理还乱 2024-09-24 17:45:29

要将 ISO8601 日期转换为本地时区，请执行以下操作：

require "time"
dt1 = Time.parse("2010-09-06T12:27:00.10-05:00")

要将 ISO8601 日期转换为 UTC，请执行以下操作：

dt2 = Time.iso8601("2010-09-06T12:27:00.10-05:00")

如果比较上述查询返回的日期，它们将是相同的（即 dt1 === dt2）。但是，访问日期组件（如年、月、日、小时等）将返回适合时区（UTC 或本地）的值。这同样适用于 strftime。

To convert an ISO8601 date into the local time zone, do this:

require "time"
dt1 = Time.parse("2010-09-06T12:27:00.10-05:00")

To convert an ISO8601 date into UTC, do this:

dt2 = Time.iso8601("2010-09-06T12:27:00.10-05:00")

If you compare the dates returned by the above queries, they will be identical (i.e. dt1 === dt2). However, accessing date components (like year, month, day, hour, etc.) will return values appropriate for the time zone (either UTC or local). The same applies to strftime.

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