JavaScript regex to validate complicated string

Question

Could you please help me to provide a RegEx pattern to validate a string which satisfy:

length from 4 to 10 (strictly)
first 3 characters must be string (A-Z a-z)
the remain characters must be number without 00 as prefix, I mean ABC15 is passed but ABC0015 is not.

This problem took me so much time and I have tried so many regex patterns, but I still have no solution for it. Thank you so much.

Can you provide some examples you tried?

Felix Kling
– Felix Kling

2012-02-19 18:20:32 +00:00
Commented Feb 19, 2012 at 18:20 — Felix Kling
– Felix Kling, Commented Feb 19, 2012 at 18:20

Rob W · Accepted Answer · 2012-02-19 18:25:57Z

4

Use this one:

/^[a-z]{3}(?!00)\d{1,7}$/i

Explanation:

/
^         Start
[a-z]{3}  Three letters.
(?!00)    Must NOT be followed by two zeros.
\d{1,7}   One to seven digits.
$         End.
/i        ignore case flag.

edited Feb 19, 2012 at 18:25

answered Feb 19, 2012 at 18:19

Rob W

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Comments

Niet the Dark Absol · Accepted Answer · 2012-02-19 18:30:18Z

1

Easy.

/^[a-z]{3}[1-9][0-9]{0,6}$/i

Matches three letters (case insensitive flag at the end), followed by one digit that is not zero, followed by up to six more digits (which may be zero).

edited Feb 19, 2012 at 18:30

answered Feb 19, 2012 at 18:18

Niet the Dark Absol

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3 Comments

Niet the Dark Absol Over a year ago

No it isn't. It's (3 letters) + (1 digit) + (up to 6 digits), which has 4 as a minimum and 10 as a max.

Rob W Over a year ago

This pattern also matches AAA4444444444444444444, because of the missing ^ and $. Also, it allows consecutive zeros ater [a-z]{3}.

Niet the Dark Absol Over a year ago

Whoopsie. Usually I don't forget things like that. And I wasn't sure if it should allow ABC0123 (ie. one leading zero) or not... The question didn't really clear that one up.

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