Regular Expressions 101

Explanation

Pro

Group instance(?<instance>\d+:\d+)

\d+a digit, repeated at least once

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\d+a digit, repeated at least once

the literal (32₁₀ / 40₈ / 20₁₆)

Group role(?<role>[a-zA-Z]+)

Character Class[a-zA-Z]+

+matches at least one character from the set below:

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

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

the literal (32₁₀ / 40₈ / 20₁₆)

Group service_id(?<service_id>\d+)

\d+a digit, repeated at least once

Non-Capturing Group(?:\s(?<state>SB|IB|RD|DD))?

?repeats the group contents below at most once:

\sany whitespace character

Group state(?<state>SB|IB|RD|DD)

1st AlternativeSB

SBthe literal text SB (case sensitive)

2nd AlternativeIB

IBthe literal text IB (case sensitive)

3rd AlternativeRD

RDthe literal text RD (case sensitive)

4th AlternativeDD

DDthe literal text DD (case sensitive)

Non-Capturing Group(?:\s(?<flags>[A-Z]+)\b)?

?repeats the group contents below at most once:

\sany whitespace character

Group flags(?<flags>[A-Z]+)

Character Class[A-Z]+

+matches at least one character from the set below:

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

\ban ASCII word boundary

Non-Capturing Group(?:\s(?<activity>InTransition|Down|Up))?

?repeats the group contents below at most once:

\sany whitespace character

Group activity(?<activity>InTransition|Down|Up)

1st AlternativeInTransition

InTransitionthe literal text InTransition (case sensitive)

2nd AlternativeDown

Downthe literal text Down (case sensitive)

3rd AlternativeUp

Upthe literal text Up (case sensitive)

Non-Capturing Group(?:\s(?<other>[a-zA-Z]+))?

?repeats the group contents below at most once:

\sany whitespace character

Group other(?<other>[a-zA-Z]+)

Character Class[a-zA-Z]+

+matches at least one character from the set below:

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

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

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

Unit Test Summary

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Quick Reference

25 tokens

Regular Expression

(?<instance>\d+:\d+) (?<role>[a-zA-Z]+) (?<service_id>\d+)(?:\s(?<state>SB|IB|RD|DD))?(?:\s(?<flags>[A-Z]+)\b)?(?:\s(?<activity>InTransition|Down|Up))?(?:\s(?<other>[a-zA-Z]+))?

Unit Tests

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