以特定单词结尾的正则表达式

Question

I have following regex sandbox

https://regex101.com/r/5rcScT/4

When I use \\w*-[Ff]iltered\\b it gets fff-filtered-qq and nope-Filtered-ok which I do not want. I only want words specifically ends with -filtered. Such as this-filtered and wow-Filtered

What I am missing here?

Answer 1

You may use a whitespace boundary (?!\\S) :

\w*-[Ff]iltered(?!\S)

See the regex demo

To make sure you match at least 1 word char before a hyphen, replace * with + :

\w+-[Ff]iltered(?!\S)

The (?!\\S) is a negative lookahead that fails the match if there is no non-whitespace char immediately to the right of the current location, ie it matches the location that is followed with whitespace or end of string (it is equal to the (?=\\s|$) positive lookahead, but is more efficient due to the absence of alternation).

Answer 2

You can use alteration with either a whitespace character or end of line (with /m flag):

/\w*-[Ff]iltered(\s|$)/m

Demo

This would be for a regex environment without a look around assertion (awk, ERE, etc) If you have a look around, use Wiktor Stribiżew's answer.

Answer 3

You can use this :

\w*Id\b

\\w* allows word characters in front of Id and the \\b ensures that Id is at the end of the word ( \\b is word boundary assertion).