Regular Expressions 101

Pro

1st AlternativeQ[A-Z ]*(?<!\b[A-Z]{2}Q)[\d.]+(*SKIP)(*F)

Qthe literal Q (81₁₀ / 121₈ / 51₁₆) (case sensitive)

Character Class[A-Z ]*

*matches any number of characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

the literal (32₁₀ / 40₈ / 20₁₆)

Negative Lookbehind(?<!\b[A-Z]{2}Q)

\ban ASCII word boundary

Character Class[A-Z]{2}

{2}matches exactly 2 characters from the set below:

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Qthe literal Q (81₁₀ / 121₈ / 51₁₆) (case sensitive)

Character Class[\d.]+

+matches at least one character from the set below:

\da digit

.the literal . (46₁₀ / 56₈ / 2E₁₆)

(*SKIP)acts like (*PRUNE), but the next unanchored match attempt starts where (*SKIP) was reached instead of at the next subject character

(*F)forces the current match attempt to fail at this position

2nd Alternative\d+(?:\.\d+)(?!\d*END$)

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Negative Lookahead(?!\d*END$)

\d*a digit, repeated any number of times

ENDthe literal text END (case sensitive)

$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

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25 tokens

Q[A-Z ]*(?<!\b[A-Z]{2}Q)[\d.]+(*SKIP)(*F)|\d+(?:\.\d+)(?!\d*END$)

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