逗号分隔的正则表达式

Question

I have an email regex I am happy with, lets call it EMAIL. So my field validator looks like this

var regex=/^EMAIL$/

But now the Captain tells me he wants to allow comma separated emails in the field.

What first comes to mind is something like

/^(EMAIL)?(, EMAIL)*$/

but that repeats EMAIL, which already offends my senses. Is there a way to write this regex without repeating EMAIL?

Answer 1

用逗号分隔值，然后在每一个上使用正则表达式。

Answer 2

This covers all the examples mentioned

^(EMAIL(,\s|$))+$

It matches

EMAIL
EMAIL, EMAIL

but not

EMAILEMAIL

Answer 3

I can't think of a way to match email list as it is , without repeating EMAIL. Here is a simple workaround:

/^(EMAIL, )+$/.test(emailList + ", ");

Example:

var s = "abc, def, ghi, jkl";
/^([a-z]+, )+$/.test(s + ", ");

Answer 4

杰森（Jason's）似乎是最简单的，但是就其价值而言，您还可以使用反向引用 ： ^EMAIL, EMAIL$将与^(EMAIL), \\1$ 。