Complex Javascript Regexp Expression

Question

I want to test the content of a particular text field for the following rules:

It should be number with 5 digits and a caret symbol at the end of each number.
The above can occur only 4 times and the entire content should always end with number.

Examples:

Valid

11111^11111
11111

Invalid

11111^11111^1111
11111^11111^11111^11111^11111
11111^11111^11111^11111^
11111^

I am trying to implement the same using regex, and tried:

/^([0-9]{5}\^){1,4}$/g

Your question is confusing. You list invalid groups as valid. Which do you want? — Daedalus
– Daedalus, Commented Sep 11, 2012 at 23:59

João Silva · Accepted Answer · 2012-09-12 00:05:29Z

5

Try the following:

/^\d{5}(\^\d{5}){0,3}$/

It matches 5 digits at the beginning of the line ^\d{5}, followed by zero to three {0,3} groups of a caret and 5 digits (\^\d{5}), thus guaranteeing that you can only have 4 groups.

DEMO.

edited Sep 12, 2012 at 0:05

answered Sep 11, 2012 at 23:51

João Silva

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7 Comments

Daedalus Over a year ago

More than one group is supposed to be invalid, by the question.

João Silva Over a year ago

@Daedalus: His first test has two groups and it's valid: 11111^11111(valid).

Daedalus Over a year ago

As of this writing, your regex would match the invalid groups as well. See here.

João Silva Over a year ago

@Daedalus: Indeed, it should be three groups instead of four. I've edited my answer, thanks

João Silva Over a year ago

@Daedalus: I admit the question is a bit confusing, but I think based on OP's examples and his intro, he basically wants to match groups of 5 digits separated by a caret, and up to 4 groups. This interpretation, I think, reflects the introduction as well as the examples and my regex.

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