Regular Expressions 101

Negative Lookbehind(?<!\S)

\Sany non-whitespace character

Non-Capturing Group(?:[1-9]\d\d?,\d{3}|(?:[1-9]\d?|1[0-4]\d),\d{3},\d{3}|150,000,000)

1st Alternative[1-9]\d\d?,\d{3}

Character Class[1-9]

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

\da digit

\d?optionally matches a digit

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

2nd Alternative(?:[1-9]\d?|1[0-4]\d),\d{3},\d{3}

Non-Capturing Group(?:[1-9]\d?|1[0-4]\d)

1st Alternative[1-9]\d?

Character Class[1-9]

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

\d?optionally matches a digit

2nd Alternative1[0-4]\d

1the literal 1 (49₁₀ / 61₈ / 31₁₆)

Character Class[0-4]

0-4one character from 0 (48₁₀) to 4 (52₁₀)

\da digit

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

,the literal , (44₁₀ / 54₈ / 2C₁₆)

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

3rd Alternative150,000,000

150,000,000the literal text 150,000,000

Negative Lookahead(?!\S)

\Sany non-whitespace character

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

Search reference

Regular Expression

(?<!\S)(?:[1-9]\d\d?,\d{3}|(?:[1-9]\d?|1[0-4]\d),\d{3},\d{3}|150,000,000)(?!\S)

There are no unit tests, click to add some.