Regular Expressions 101

Pro

^start of line

Group address(?<address>(?<streetname>\h*\S.*?)\h*(?<housenumber>\d+\h*[A-Za-z]?))

Group streetname(?<streetname>\h*\S.*?)

\h*any horizontal whitespace character, repeated any number of times

\Sany non-whitespace character

.*?any character (except for line terminators), repeated any number of times

\h*any horizontal whitespace character, repeated any number of times

Group housenumber(?<housenumber>\d+\h*[A-Za-z]?)

\d+a digit, repeated at least once

\h*any horizontal whitespace character, repeated any number of times

Character Class[A-Za-z]?

?matches at most one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

Non-Capturing Group(?:/(?<stairs>\d+)(?=(?:/\d+){1,2}))?

?repeats the group contents below at most once:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group stairs(?<stairs>\d+)

\d+a digit, repeated at least once

Positive Lookahead(?=(?:/\d+){1,2})

Non-Capturing Group(?:/\d+){1,2}

{1,2}repeats the group contents below between 1 and 2 times:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:/(?<floor>\d)(?=(?:/\d+)))?

?repeats the group contents below at most once:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group floor(?<floor>\d)

\da digit

Positive Lookahead(?=(?:/\d+))

Non-Capturing Group(?:/\d+)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:/(?<door>\d+))?

?repeats the group contents below at most once:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group door(?<door>\d+)

\d+a digit, repeated at least once

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

No unit tests · Add a test to get started

25 tokens

Regular Expression

^(?<address>(?<streetname>\h*\S.*?)\h*(?<housenumber>\d+\h*[A-Za-z]?))(?:/(?<stairs>\d+)(?=(?:/\d+){1,2}))?(?:/(?<floor>\d)(?=(?:/\d+)))?(?:/(?<door>\d+))?$

Unit Tests

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