Regular Expressions 101

^start of line

Group name(?P<name>.+?)

.+?any character (except for line terminators), repeated at least once

Non-Capturing Group(?:\s+(?P<id>\d+))?

?repeats the group contents below at most once:

\s+any whitespace character, repeated at least once

Group id(?P<id>\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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?P<name>.+?)(?:\s+(?P<id>\d+))?$

New

Mr. John Smith 1111
Mr. John12 Smith 1111
Mr. John12 Smith223    1111