睡眠直到条件在 ruby​​ 中为真 [英] sleep until condition is true in ruby

问题描述

Ruby 是否有更好的睡眠方式，直到某些条件成立?

Is there any better way in Ruby to sleep until some condition is true ?

loop do 
  sleep(1)
  if ready_to_go
    break
  end
end

推荐答案

until 可以是语句修饰符，导致:

until can be a statement modifier, leading to:

sleep(1) until ready_to_go

您必须在另一个线程更改ready_to_go 的线程中使用它，否则您将挂起.

You'll have to use that in a thread with another thread changing ready_to_go otherwise you'll hang.

while (!ready_to_go)
  sleep(1)
end

与此类似，但同样，您需要切换ready_to_go 或挂起.

is similar to that but, again, you'd need something to toggle ready_to_go or you'd hang.

您可以使用:

until (ready_to_go)
  sleep(1)
end

但我从不习惯像这样使用 until.实际上我几乎从不使用它，更喜欢等效的 (!ready_to_go).

but I've never been comfortable using until like that. Actually I almost never use it, preferring the equivalent (!ready_to_go).

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