What is an escape character in Ruby?

Question

I would like to split lines which contains [ (bracket: []). However, when I type this as /[/ it is treated as comment.

Answer 1

您需要像/\\[/一样转义[字符。

Answer 2

I infer that you're using string.split , which can use a regex (the stuff between the / /) to indicate what delimiter character it will split the string into a list with.

Well, regexes use the [ and ] characters in a special way, to denote that such a group will match any of the characters inside.

[abc] => matches a, b, or c

Since you actually need to match the [ symbol literally, you need to escape it with the \\ switch

So, write your split as:

string.split(/\[/)