Regular expression Find the space before the last word

Question

I am trying to find the space before the last word of a string.

For example, for

Bob Jane 

I would like to find a space right in front of Jane. I try to find and replace everything in order to become a comma. So the end result will be

 Bob ,Jane 

I only do this in a text editor (using Sublime), so I do not use a programming language. Thanks!

Answer 1

 [ ](?=[^ ]+$) 

You can try this.Replace by,. Watch the demo.

https://regex101.com/r/oL9kE8/17

Answer 2

Find what:

  (\S+ *)$ 

Spare line:

 ,\1 

Demo

If you want to add a comma after a space before the last word, try the following regular expression.

 (?<= )(\S+ *)$ 

Replaced string:

 ,\1 

Demo