What's the regular expression for pipe-delimited number?

Question

I want to check that a String is pipe-generated numbers. There should be numbers between pipes.

Valid Strings examples: 300, 300|600.
Invalid Strings examples: 300||||600

I tried ^([\d|\d])*$. However, this still said that 300||||600 is a valid String.

@Barmar should I remove my comment in your opinion ? target for closing? — Denys Séguret, Oct 07 '19 at 18:52
@DenysSéguret My comment was to the OP, not you. You should post that as an answer. — Barmar, Oct 07 '19 at 18:52
`^([\d|\d])*$` matches a digit or `|` any number of times, in any order. I recommend going to regex101.com to see what your pattern is doing. https://regex101.com/r/rLV5IC/1 — CAustin, Oct 07 '19 at 18:54

score 1 · Accepted Answer · answered Oct 07 '19 at 18:54

1

Here, what you want is one number, ie \d+, followed by an undetermined number of occurrences of a pipe then a number, which would be (\|\d+)* (the pipe is escaped).

As you want it to cover the whole input this would be

^\d+(\|\d+)*$

answered Oct 07 '19 at 18:54

Denys Séguret

355,860
83
755
726

It works. Thanks. – Khoa Nguyen Anh Oct 07 '19 at 20:30

What's the regular expression for pipe-delimited number?

1 Answers1