Regular Expressions 101

Non-Capturing Group(?:^|\s)

1st Alternative^

^start of line

2nd Alternative\s

\sany whitespace character

Group 1(\d*\.\d+)

\d*a digit, repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?:^|\s)(\d*\.\d+)(?!\S)

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