File.join 什么时候有用? [英] When is File.join useful?

问题描述

通过阅读文档，很明显 File.join 将给定的参数与/字符连接起来.
什么时候使用这个，相对于 filenames.join('/')，有益吗?

From reading the documentation, it's apparent that File.join joins the given parameters with the / character.
When is using this, as opposed to filenames.join('/'), beneficial?

推荐答案

还有一个细微的区别:

File.join('foo','bar')
#=> "foo/bar"
['foo','bar'].join('/')
#=> "foo/bar"

但是，如果您传递的参数已经以 / 结尾(这在处理路径时很常见)，则结果中不会有两个斜杠:

But, if you pass an argument already ending with / (which is quite often when working with paths), you won't have two slashes in the result:

File.join('foo/','bar')
#=> "foo/bar"
['foo/','bar'].join('/')
#=> "foo//bar"

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