Regular Expressions 101

Explanation

Pro

1st Alternative\d+/\d+(?:/\d+)?

\d+a digit, repeated at least once

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:/\d+)?

?repeats the group contents below at most once:

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\d+a digit, repeated at least once

2nd Alternative(?:\d+ )?(?:Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|June?|July?|Aug(?:ust)?|Sep(?:tember)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?)[.,]?(?:-\d+-\d+| \d+(?:th|rd|st|nd)?,? \d+| \d+)

Non-Capturing Group(?:\d+ )?

?repeats the group contents below at most once:

\d+a digit, repeated at least once

the literal (32₁₀ / 40₈ / 20₁₆)

Non-Capturing Group(?:Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|June?|July?|Aug(?:ust)?|Sep(?:tember)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?)

1st AlternativeJan(?:uary)?

Janthe literal text Jan (case sensitive)

Non-Capturing Group(?:uary)?

?repeats the group contents below at most once:

uarythe literal text uary (case sensitive)

2nd AlternativeFeb(?:ruary)?

Febthe literal text Feb (case sensitive)

Non-Capturing Group(?:ruary)?

?repeats the group contents below at most once:

ruarythe literal text ruary (case sensitive)

3rd AlternativeMar(?:ch)?

Marthe literal text Mar (case sensitive)

Non-Capturing Group(?:ch)?

?repeats the group contents below at most once:

chthe literal text ch (case sensitive)

4th AlternativeApr(?:il)?

Aprthe literal text Apr (case sensitive)

Non-Capturing Group(?:il)?

?repeats the group contents below at most once:

ilthe literal text il (case sensitive)

5th AlternativeMay

Maythe literal text May (case sensitive)

6th AlternativeJune?

Junthe literal text Jun (case sensitive)

e?optionally matches the literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

7th AlternativeJuly?

Julthe literal text Jul (case sensitive)

y?optionally matches the literal y (121₁₀ / 171₈ / 79₁₆) (case sensitive)

8th AlternativeAug(?:ust)?

Augthe literal text Aug (case sensitive)

Non-Capturing Group(?:ust)?

?repeats the group contents below at most once:

ustthe literal text ust (case sensitive)

9th AlternativeSep(?:tember)?

Septhe literal text Sep (case sensitive)

Non-Capturing Group(?:tember)?

?repeats the group contents below at most once:

temberthe literal text tember (case sensitive)

10th AlternativeOct(?:ober)?

Octthe literal text Oct (case sensitive)

Non-Capturing Group(?:ober)?

?repeats the group contents below at most once:

oberthe literal text ober (case sensitive)

11th AlternativeNov(?:ember)?

Novthe literal text Nov (case sensitive)

Non-Capturing Group(?:ember)?

?repeats the group contents below at most once:

emberthe literal text ember (case sensitive)

12th AlternativeDec(?:ember)?

Decthe literal text Dec (case sensitive)

Non-Capturing Group(?:ember)?

Character Class[.,]?

Non-Capturing Group(?:-\d+-\d+| \d+(?:th|rd|st|nd)?,? \d+| \d+)

3rd Alternative\d{4}

Global pattern flags

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

\d+/\d+(?:/\d+)?|(?:\d+ )?(?:Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|June?|July?|Aug(?:ust)?|Sep(?:tember)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?)[.,]?(?:-\d+-\d+| \d+(?:th|rd|st|nd)?,? \d+| \d+)|\d{4}

04/20/2009; 04/20/09; 4/20/09; 4/3/09
Mar-20-2009; Mar 20, 2009; March 20, 2009; Mar. 20, 2009; Mar 20 2009;
20 Mar 2009; 20 March 2009; 20 Mar. 2009; 20 March, 2009
Mar 20th, 2009; Mar 21st, 2009; Mar 22nd, 2009
Feb 2009; Sep 2009; Oct 2010 (shall be parsed to 02/01/2009, 09/01/2009 etc)
6/2008; 12/2009 (shall be parsed to 06/01/2008 etc).
2009; 2010 (shall be parsed to 01/01/2009 and 01/01/2010)
AFeb 1977: Symmes Hospital\n
NV fire fighter died Sep 2007 while working. Was friend from deployment to San Marino and trainings for years prior. Still troubling to pt. Didn't go to his funeral. Spiritual/Religion:
's Cathy Bowers is a 50 yo single Caucasian female who presents to the ANH Eating Disorders Department for an evaluation and treatment recommendations for low weight. She shared that she has recently lost a great deal of weight and is having difficulty meeting her calorie needs due to difficulties with gagging/swallowing, and aversions to specific food textures. Specifically, since

Substitution

04/20/2009; 04/20/09; 4/20/09; 4/3/09
Mar-20-2009; Mar 20, 2009; March 20, 2009; Mar. 20, 2009; Mar 20 2009;
20 Mar 2009; 20 March 2009; 20 Mar. 2009; 20 March, 2009
Mar 20th, 2009; Mar 21st, 2009; Mar 22nd, 2009
Feb 2009; Sep 2009; Oct 2010 (shall be parsed to 02/01/2009, 09/01/2009 etc)
6/2008; 12/2009 (shall be parsed to 06/01/2008 etc).
2009; 2010 (shall be parsed to 01/01/2009 and 01/01/2010)
AFeb 1977: Symmes Hospital\n
NV fire fighter died Sep 2007 while working. Was friend from deployment to San Marino and trainings for years prior. Still troubling to pt. Didn't go to his funeral. Spiritual/Religion:
's Cathy Bowers is a 50 yo single Caucasian female who presents to the ANH Eating Disorders Department for an evaluation and treatment recommendations for low weight. She shared that she has recently lost a great deal of weight and is having difficulty meeting her calorie needs due to difficulties with gagging/swallowing, and aversions to specific food textures. Specifically, since