Remove space from a string

Question

Say I have a string like this:

set str "BAT-CAT, DOG,ELEPHANT ,LION & MOUSE-ANT ,MONKEY, DONKEY"

Now I want to get STRING as follows:

"BAT-CAT,DOG,ELEPHANT,LION&MOUSE-ANT,MONKEY,DONKEY"

I am using trim function to remove white space but it is not working kindly suggest any regsub or procedure for same thank you

Answer 1

The best way to remove all spaces from a string is to use string map:

set stripped [string map {" " ""} $originalString]

Answer 2

regsub -all { } $str ""

This will return: BAT-CAT,DOG,ELEPHANT,LION&MOUSE-ANT,MONKEY,DONKEY