Regular Expressions 101

Explanation

Pro

Negative Lookahead(?!.*[ ]{1})

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

Character Class[ ]{1}

{1}matches one character from the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

Non-Capturing Group(?:(?:[Mc|O']*[A-Z]{1}[a-z]+)|(?:[\d]+[rd|th|st|nd]*))

1st Alternative(?:[Mc|O']*[A-Z]{1}[a-z]+)

Non-Capturing Group(?:[Mc|O']*[A-Z]{1}[a-z]+)

Character Class[Mc|O']*

*matches any number of characters from the set below:

Mthe literal M (77₁₀ / 115₈ / 4D₁₆) (case sensitive)

cthe literal c (99₁₀ / 143₈ / 63₁₆) (case sensitive)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

Othe literal O (79₁₀ / 117₈ / 4F₁₆) (case sensitive)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Character Class[A-Z]{1}

{1}matches one character from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Character Class[a-z]+

+matches at least one character from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

2nd Alternative(?:[\d]+[rd|th|st|nd]*)

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

Character Class[\d]+

+matches at least one character from the set below:

\da digit

Character Class[rd|th|st|nd]*

*matches any number of characters from the set below:

rthe literal r (114₁₀ / 162₈ / 72₁₆) (case sensitive)

dthe literal d (100₁₀ / 144₈ / 64₁₆) (case sensitive)

|the literal | (124₁₀ / 174₈ / 7C₁₆)

tthe literal t (116₁₀ / 164₈ / 74₁₆) (case sensitive)

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

sthe literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

nthe literal n (110₁₀ / 156₈ / 6E₁₆) (case sensitive)

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

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25 tokens

(?!.*[ ]{1})(?:(?:[Mc|O']*[A-Z]{1}[a-z]+)|(?:[\d]+[rd|th|st|nd]*))

There are no unit tests.