Regular Expressions 101

Explanation

Pro

1st Alternative(?:^([A-Y])?\s*(\d{0,4})\s?([a-d])?)

Non-Capturing Group(?:^([A-Y])?\s*(\d{0,4})\s?([a-d])?)

^start of line

Group 1([A-Y])?

?repeats the group contents below at most once:

Character Class[A-Y]

A-Yone character from A (65₁₀) to Y (89₁₀) (case sensitive)

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

Group 2(\d{0,4})

\d{0,4}a digit, repeated between 0 and 4 times

\s?optionally matches any whitespace character

Group 3([a-d])?

?repeats the group contents below at most once:

Character Class[a-d]

a-done character from a (97₁₀) to d (100₁₀) (case sensitive)

2nd Alternative(?:^((?:\w+)|(?:\w+,)|(?:\w+, \w*))?\s*((?:&{1,2}|and|or|\|{2})\s+(?:.*)*)*)

Non-Capturing Group(?:^((?:\w+)|(?:\w+,)|(?:\w+, \w*))?\s*((?:&{1,2}|and|or|\|{2})\s+(?:.*)*)*)

^start of line

Group 4((?:\w+)|(?:\w+,)|(?:\w+, \w*))?

?repeats the group contents below at most once:

1st Alternative(?:\w+)

Non-Capturing Group(?:\w+)

\w+any word character, repeated at least once

2nd Alternative(?:\w+,)

Non-Capturing Group(?:\w+,)

\w+any word character, repeated at least once

,the literal , (44₁₀ / 54₈ / 2C₁₆)

3rd Alternative(?:\w+, \w*)

Non-Capturing Group(?:\w+, \w*)

\w+any word character, repeated at least once

, the literal text ,

\w*any word character, repeated any number of times

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

Group 5((?:&{1,2}|and|or|\|{2})\s+(?:.*)*)*

*repeats the group contents below any number of times:

Non-Capturing Group(?:&{1,2}|and|or|\|{2})

1st Alternative&{1,2}

&{1,2}the literal & (38₁₀ / 46₈ / 26₁₆) , repeated between 1 and 2 times

2nd Alternativeand

andthe literal text and (case sensitive)

3rd Alternativeor

orthe literal text or (case sensitive)

4th Alternative\|{2}

\|{2}the literal | (124₁₀ / 174₈ / 7C₁₆) , repeated exactly 2 times

\s+any whitespace character, repeated at least once

Non-Capturing Group(?:.*)*

*repeats the group contents below any number of times:

.*any character (except for line terminators), repeated any number of times

the literal text ↵↵

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

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

(?:^([A-Y])?\s*(\d{0,4})\s?([a-d])?)|(?:^((?:\w+)|(?:\w+,)|(?:\w+, \w*))?\s*((?:&{1,2}|and|or|\|{2})\s+(?:.*)*)*)

New

thra

^\s*((?:\w+)(?:,?\s?)(?:,\s\w+\s*)*)


^\s*?((?:\w+){1}\s*(?:(?:,?)|(?:,\s\w+))*\s*)

\s*((?:&{1,2}|and|or|\|{2})\s+(?:.*)*)*

(?:^([A-Y] +)*(\d{0,4}) ?(a-d))|

Substitution

thra

^\s*((?:\w+)(?:,?\s?)(?:,\s\w+\s*)*)


^\s*?((?:\w+){1}\s*(?:(?:,?)|(?:,\s\w+))*\s*)

\s*((?:&{1,2}|and|or|\|{2})\s+(?:.*)*)*

(?:^([A-Y] +)*(\d{0,4}) ?(a-d))|