regex - Regexp in Vim Not working as expected

Question

Why is the following regex

/\d{2, 4}/

which I expect to identify all between 2 and 4 digits in a text not working when I run it on the following text

1234567890

in vim.

Answer 1

您的表达式有两点错误：1.第一个大括号需要转义，2.量词内不应该有空格。

/\d\{2,4}/

见:help /\{。

如果您打开very magic，例如通过以 开头的表达式\v，则不需要转义第一个大括号：

/\v\d{2,4}/