POSIX and PCRE compliant regex to extract a word

Question

I want to extract a string whether it is at the beginning of a sentence or the end it has to be the whole word. The expression should work in both PCRE and POSIX.

Example:

input strings=['ALLY [&] MORTY','[&] ME', '[&]']
---> match is in bracket

Are the brackets actually in the string?

Barmar
– Barmar

2023-09-26 19:51:15 +00:00
Commented Sep 26, 2023 at 19:51 — Barmar
– Barmar, Commented Sep 26, 2023 at 19:51

Barmar · Accepted Answer · 2023-09-26 19:53:56Z

0

(^| )(&)( |$)

(^| ) matches either the beginning of the string or a space
(&) matches the literal string &.
( |$) matches either a space or the end of the string.

The match will be in capture group 1.

answered Sep 26, 2023 at 19:53

Barmar

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