Does anyone have a regex for Irish postcodes?

eteb3 · 2024-10-29T14:56:04.219Z

This would be very useful. Thanks.

Jofban · 2024-10-31T02:26:53.323Z

Quoting from Postal addresses in the Republic of Ireland - Wikipedia

Each code consists of seven letters and/or digits, with a space after the third character. The first character is always a letter and the second is always a digit. The third character may be either a digit or the letter W, but not any other letter. The remaining four characters may either be letters or digits.

You didn’t specify a regex format, but it would commonly be understood as “[A-Z][0-9][0-9|W] [0-9|A-Z]{4}”

eteb3 · 2024-11-01T14:37:37.930Z

Jofban:

You didn’t specify a regex format, but it would commonly be understood as “[A-Z][0-9][0-9|W] [0-9|A-Z]{4}”

I’m using LibreOffice Calc, and this is perfect, thank you.

Jofban · 2024-11-01T22:58:23.714Z

Please mark my answer as the solution, so others know that it has been solved. Thanks!

eteb3 · 2024-11-02T08:26:26.884Z

I haven’t got enough kudos on the Irish forum. At least - I think that’s why I can’t mark a solution here, but I can elsewhere.

eteb3 · 2024-11-05T09:07:31.633Z

Possible Discourse settings change? This Site Feedback

The reason is that the “solution” option is not activated for the Ireland category but for the Help and suppport category. If you want this option for the Ireland category you have to apply to the forum admin team. It can be arranged on request.

ToniE · 2024-11-05T09:14:59.996Z

Using PCRE Perl compatible regex, the ‘|’ in the square brackets would be allowed as well. Being in those square brackets, the ‘|’ is not seen as an OR but rather as is.

Jofban · 2024-11-05T20:53:09.759Z

Yeah, it’s sort of a “human readable” version that’s in no specific format.

Using the PCRE format, which is wide-spread, the regex could be written more precisely like that:
[A-Z][0-9][0-9W] [0-9A-Z]{4}

This regex also works in Libreoffice Calc, which uses ICU Regular Expressions as per the REGEX documentation.