[nickcw]

My favorite feature is:

       -P, --perl-regexp
       
              Interpret I<PATTERNS> as Perl-compatible regular
              expressions (PCREs). This option is experimental when
              combined with the -z (--null-data) option, and grep -P
              may warn of unimplemented features.

As everything (python, Go, javascript, etc, etc) uses perl regexps now-a-days and I can never remember which things I need to escape for old gods regexp.

[kjeetgill]

Haha, agreed 100%. My go to for years had been https://www.regexplanet.com/. It let's you test what regex escapes work where without spinning up one-off `void main()s`.

[silisili]

Slightly pedantic, but Go uses RE2 which is subtly different than PCRE. In most common use cases, you'd probably never know.

[hrez]

also combined with -o i.e.

grep -Po "Name:\K\w+"