Regular Expressions 101

Negative Lookbehind(?<!\S)

\Sany character that is not Unicode whitespace

Group name(?<name>\w+)

\w+a Unicode word character, repeated at least once

Positive Lookahead(?=(?:[^|]*\|){3}\s*\b(?<value>[0-9]+(?:\.[0-9]+)?)\s+(?<unit>[^0-9\s]\S*))

Non-Capturing Group(?:[^|]*\|){3}

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

Negated Character Class[^|]*

*matches any number of characters outside the set below:

|the literal | (124₁₀ / 174₈ / 7C₁₆)

\|the literal | (124₁₀ / 174₈ / 7C₁₆)

\s*a Unicode whitespace character, repeated any number of times

\ba Unicode word boundary

Group value(?<value>[0-9]+(?:\.[0-9]+)?)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

Non-Capturing Group(?:\.[0-9]+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Character Class[0-9]+

+matches at least one character from the set below:

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\s+a Unicode whitespace character, repeated at least once

Group unit(?<unit>[^0-9\s]\S*)

Negated Character Class[^0-9\s]

0-9one character from 0 (48₁₀) to 9 (57₁₀)

\sa Unicode whitespace character

\S*any character that is not Unicode whitespace, repeated any number of times

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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Search reference

Regular Expression

(?<!\S)(?<name>\w+)(?=(?:[^|]*\|){3}\s*\b(?<value>[0-9]+(?:\.[0-9]+)?)\s+(?<unit>[^0-9\s]\S*))

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