使用 delta 迭代 Ruby Time 对象 [英] Iterate over Ruby Time object with delta

问题描述

有没有办法在 Ruby 中迭代时间范围并设置增量?

Is there a way to iterate over a Time range in Ruby, and set the delta?

这是我想做的事情的一个想法:

Here is an idea of what I would like to do:

for hour in (start_time..end_time, hour)
    hour #=> Time object set to hour
end

您可以遍历 Time 对象，但它会在两者之间每秒返回一次.我真正需要的是一种设置偏移量或增量(例如分钟、小时等)的方法

You can iterate over the Time objects, but it returns every second between the two. What I really need is a way to set the offset or delta (such as minute, hour, etc.)

这是 Ruby 内置的，还是有不错的插件可用?

Is this built in to Ruby, or is there a decent plugin available?

推荐答案

在 1.9 之前，您可以使用 Range#step:

Prior to 1.9, you could use Range#step:

(start_time..end_time).step(3600) do |hour|
  # ...
end

然而，这个策略很慢，因为它会调用 Time#succ 3600 次.反而，正如 dolzenko 在 他的回答 中指出的那样，更有效的解决方案是使用简单的循环:

However, this strategy is quite slow since it would call Time#succ 3600 times. Instead, as pointed out by dolzenko in his answer, a more efficient solution is to use a simple loop:

hour = start_time
while hour < end_time
  # ...
  hour += 3600
end

如果您使用 Rails，您可以将 3600 替换为 1.hour，这样可读性更强.

If you're using Rails you can replace 3600 with 1.hour, which is significantly more readable.

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