Regular Expressions 101

Explanation

Pro

^start of line

Group 1([A-Za-z]+)

Character Class[A-Za-z]+

+matches at least 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)

Group 2(\s*)

\s*any whitespace character, repeated any number of times

Group 3([0,1]*[0-9])

Character Class[0,1]*

*matches any number of characters from the set below:

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-9]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Group 4(,*\s*)

,*the literal , (44₁₀ / 54₈ / 2C₁₆) , repeated any number of times

\s*any whitespace character, repeated any number of times

Group 5([0-9]{2,4})

Character Class[0-9]{2,4}

{2,4}matches between 2 and 4 characters from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

$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.

25 tokens

^([A-Za-z]+)(\s*)([0,1]*[0-9])(,*\s*)([0-9]{2,4})$

New

January 15, 2018

January 15,2018

January15, 2018

January15,2018

January 15 2018

Feb 15, 2018

Feb15, 18

January 15, 2018

January 15,2018

January15, 2018

January15,2018

January 15 2018

Feb 15, 2018

Feb15, 18