Regular Expressions 101

Pro

Group 1(P(?:[1-9]|1[012])\.S(?:[1-9]|\d{2}|10\d|11[012])\b)

Pthe literal P (80₁₀ / 120₈ / 50₁₆) (case sensitive)

Non-Capturing Group(?:[1-9]|1[012])

1st Alternative[1-9]

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative1[012]

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[012]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

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

Non-Capturing Group(?:[1-9]|\d{2}|10\d|11[012])

1st Alternative[1-9]

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

2nd Alternative\d{2}

\d{2}a Unicode decimal digit, repeated exactly 2 times

3rd Alternative10\d

10the literal text 10

\da Unicode decimal digit

4th Alternative11[012]

11the literal text 11

Character Class[012]

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

2the literal 2 (50₁₀ / 62₈ / 32₁₆)

\ba Unicode word boundary

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(?:[1-9]|1[012])\.S(?:[1-9]|\d{2}|10\d|11[012])\b)

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