[SOLVED] Removing leading, trailing and multiple spaces within a string

Issue

I would like to remove all leading and trailing spaces. As well as replace multiple spaces with a single space within a string, so that all words in a string are separated exactly by single space.

I could achieve this using following two iteration of regex and looking for single regex solution.

s/^\s+|\s+$//g
s/\s+/ /g

Sample Input:

   word1   word2 word3     word4    

Desired Output:

word1 word2 word3 word4

It would be appreciable if you could help me to solve this.

Solution

You can use something like:

s/^\s+|\s+$|\s+(?=\s)//g

\s+(?=\s) will match all the spaces in the middle of the string and leave one.

Answered By - Jerry

Answer Checked By - David Goodson (WPSolving Volunteer)