Regular Expressions 101

^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.

Search reference

Regular Expression

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

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January 15, 2018

January 15,2018

January15, 2018

January15,2018

January 15 2018

Feb 15, 2018

Feb15, 18