Remove duplicate strings in strings with regular expressions when using narrow strings

I encountered such a situation in my project.

 

Self-writtenProgram

VaR STR = "bw112 # ww112 # bw112 # ww112 #"; <br/> var Reg =/([/W #] {6 })(? =. +/1)/ig; // B # ww112 <br/> alert (Str. Replace (Reg ,""));

Is for regular strings

 

Six are in a group ............

And there are # matches at the end of a total of 6 times as a match ........

 

VaR Reg =/([/W]) {5} [# $]) (? =. +/1)/ig;

Another Form

 

 

Let's look at the following example.

Is it the cost of gasoline going up? The above sentence clearly contains multiple repeated words.

It would be nice to design a way to locate the sentence without having to look for repeated occurrences of each word. The following regular expressions use a single subexpression to achieve this:
// B ([A-Z] +)/1/B/GI captured expression