Regular Expressions 101

Explanation

Pro

Positive Lookbehind(?<=\p{Ll})

\p{Ll}a lowercase letter

Positive Lookahead(?=\p{Lu})

\p{Lu}an uppercase letter

Positive Lookahead(?=.*\s[sS]\d{1,2}[eE]\d)

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

\sany whitespace character

Character Class[sS]

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

Sthe literal S (83₁₀ / 123₈ / 53₁₆) (case sensitive)

\d{1,2}a digit, repeated between 1 and 2 times

Character Class[eE]

ethe literal e (101₁₀ / 145₈ / 65₁₆) (case sensitive)

Ethe literal E (69₁₀ / 105₈ / 45₁₆) (case sensitive)

\da digit

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

(?<=\p{Ll})(?=\p{Lu})(?=.*\s[sS]\d{1,2}[eE]\d)

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