Regular Expressions 101

Pro

1st Alternative(?P<first1>\w+)[ ](?P<last1>\w+)

Group first1(?P<first1>\w+)

\w+a Unicode word character, repeated at least once

Character Class[ ]

the literal (32₁₀ / 40₈ / 20₁₆)

Group last1(?P<last1>\w+)

\w+a Unicode word character, repeated at least once

2nd Alternative(?P<last2>\w+),[ ](?P<first2>\w+)

Group last2(?P<last2>\w+)

\w+a Unicode word character, repeated at least once

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Character Class[ ]

the literal (32₁₀ / 40₈ / 20₁₆)

Group first2(?P<first2>\w+)

\w+a Unicode word character, repeated at least once

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

Detailed match information will be displayed here automatically.

25 tokens

(?P<first1>\w+)[ ](?P<last1>\w+)|(?P<last2>\w+),[ ](?P<first2>\w+)

New

"first_name last_name" or "last_name, first_name"

"first_name last_name" or "last_name, first_name"