Regular Expressions 101

Negative Lookbehind(?<!\d)

\da digit

17the literal text 17

Negative Lookahead(?!\d)

\da digit

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

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?<!\d)17(?!\d)

часть 179-а
часть 17-а
часть 17-2-б
часть 176
час17 а
часть 17К