(Ruby)如何检查一个范围是否包含另一个范围的子集? [英] (Ruby) How do you check whether a range contains a subset of another range?

问题描述

如果我有两个重叠的范围:

If I have two ranges that overlap:

x = 1..10
y = 5..15

当我说:

puts x.include? y 

输出是:

false 

因为这两个范围只是部分重叠.

because the two ranges only overlap partially.

但是，如果我希望在两个范围之间存在部分重叠时它是真实的"，我该怎么写呢?换句话说，我需要一种方法来知道一个范围何时包含另一个范围的子集.我认为有一种用 Ruby 编写的优雅方法，但我能想到的唯一解决方案是冗长的.

But if I want it to be "true" when there is partial overlap between two ranges, how would I write that? In other words I need a way to know when one range contains a subset of another range. I assume there's an elegant way to write this in Ruby but the only solutions I can think of are verbose.

推荐答案

在大范围使用时要小心，但这是一种优雅的方式:

Be careful using this with large ranges but this is an elegant way to do it:

(x.to_a & y.to_a).empty?

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