Regular Expressions 101

^start of line

You see athe literal text You see a (case sensitive)

n?optionally matches the literal n (110₁₀ / 156₈ / 6E₁₆) (case sensitive)

the literal (32₁₀ / 40₈ / 20₁₆)

Negative Lookahead(?!.*(?:, whom you know as\b|$yourself!$))

.*any character (except for line terminators), repeated any number of times

Non-Capturing Group(?:, whom you know as\b|$yourself!$)

1st Alternative, whom you know as\b

, whom you know asthe literal text , whom you know as (case sensitive)

\ban ASCII word boundary

2nd Alternative$yourself!$

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

yourself!the literal text yourself! (case sensitive)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Group 1(.*)

.*any character (except for line terminators), repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

$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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^You see an? (?!.*(?:, whom you know as\b|\(yourself!\)))(.*)\.$

New

You see a tall athletic dark-brown-haired adult man with dark olive skin and hazel eyes.
You see a short fat yellow-haired youthful man with pale skin and blue eyes.

You see a masked tall-height heavy man with white skin (yourself!).
You see a furrow-browed older man with cropped pepper-gray hair, whom you know as Richard.
You see a younger man with cropped blue hair, whom you know as Bob.

Regular Expression

Substitution