Regular Expressions 101

Pro

^start of line

Non-Capturing Group(?:(?:40\d[0-5]|[1-3]\d{3}|[1-9]\d{2}|[1-9]\d|\d),){3}

{3}repeats the group contents below exactly 3 times:

Non-Capturing Group(?:40\d[0-5]|[1-3]\d{3}|[1-9]\d{2}|[1-9]\d|\d)

1st Alternative40\d[0-5]

40the literal text 40

\da digit

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

2nd Alternative[1-3]\d{3}

Character Class[1-3]

1-3one character from 1 (49₁₀) to 3 (51₁₀)

\d{3}a digit, repeated exactly 3 times

3rd Alternative[1-9]\d{2}

Character Class[1-9]

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

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

4th Alternative[1-9]\d

Character Class[1-9]

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

\da digit

5th Alternative\d

\da digit

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Non-Capturing Group(?:40\d[0-5]|[1-3]\d{3}|[1-9]\d{2}|[1-9]\d|\d)

1st Alternative40\d[0-5]

40the literal text 40

\da digit

Character Class[0-5]

0-5one character from 0 (48₁₀) to 5 (53₁₀)

2nd Alternative[1-3]\d{3}

Character Class[1-3]

1-3one character from 1 (49₁₀) to 3 (51₁₀)

\d{3}a digit, repeated exactly 3 times

3rd Alternative[1-9]\d{2}

Character Class[1-9]

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

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

4th Alternative[1-9]\d

Character Class[1-9]

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

\da digit

5th Alternative\d

\da digit

$end of line

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

No unit tests · Add a test to get started

25 tokens

Regular Expression

^(?:(?:40\d[0-5]|[1-3]\d{3}|[1-9]\d{2}|[1-9]\d|\d),){3}(?:40\d[0-5]|[1-3]\d{3}|[1-9]\d{2}|[1-9]\d|\d)$

Unit Tests

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