Regular Expressions 101

(?ix)applies the following effective flags to the remainder of the pattern: gix

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

x modifier: extended. Ignores unescaped whitespace and comments outside character classes

Group 1([^\d]+)

Negated Character Class[^\d]+

+matches at least one character outside the set below:

\da digit

Comment: Person's Name

Group 2(.*(?:st|av|blvd|rd))

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

Non-Capturing Group(?:st|av|blvd|rd)

1st Alternativest

stthe literal text st (case insensitive)

2nd Alternativeav

avthe literal text av (case insensitive)

3rd Alternativeblvd

blvdthe literal text blvd (case insensitive)

4th Alternativerd

rdthe literal text rd (case insensitive)

\.?optionally matches the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Comment: Number and Street

Group 3(.*?)

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

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

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

Comment: City

Group 4([A-Z]{2})

Character Class[A-Z]{2}

{2}matches exactly 2 characters from the set below:

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

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

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

Comment: State

Group 5(\d+)

\d+a digit, repeated at least once

Comment: Zip code

Global pattern flags

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

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25 tokens

Regular Expression

(?ix)
([^\d]+)  # Person's Name
(.*(?:st|av|blvd|rd))\.?\h*  # Number and Street
(.*?),?\h*  # City
([A-Z]{2}),?\h*  # State
(\d+)  #Zip code

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