如何删除点前的空格？

Question

I try to add a dot in the middle of sentence, before a capital letter. I tried this:

function correctSentences(str){
  s = str.replace(/([A-Z])/g,'. $1').trim();
 return s;
}
correctSentences("  avi loves pizza Dani loves cola  "); 

The output is:

"avi loves pizza . Dani loves cola"

how can i remove the space before the dot? thank you!

Answer 1

Add \s in regex

 function correctSentences(str){ s = str.replace(/(\s[AZ])/g,'.$1').trim(); return s; } console.log(correctSentences(" avi loves pizza Dani loves cola "));

Answer 2

I would use this version:

 function correctSentences(str) { return str.replace(/\s+(?=[AZ])/g, '. ').trim(); } var input = " avi loves pizza Dani loves cola "; var output = correctSentences(input); console.log(input + "\n" + output);

The regex logic here says to:

\s+        match one or more whitespace characters
(?=[A-Z])  then assert (but do not consume) that what follows is a capital letter

We replace with dot, to end the previous sentence, followed by two spaces, to separate from the start of the next sentence.

Answer 3

I propose:

 function correctSentences(str){ return str.replace(/(?=\b\s+[AZ])/g, '.').trim(); } const result = correctSentences(" avi loves pizza. Bob loves pizza Dani loves cola "); console.log(result);

Also it prevents to add an additional . if there's already a . exists.