RegExpr : Find and Replace last occurrence of a space(ASCII 20) in a line of text

In Perl regex:

s/(.*) /$1"/

Select allOpen in new window

Alternately:

s/ (?=[^ ]*$)/"/

Select allOpen in new window

Note also that "\s" in your original regex matches any whitespace character (space, tab, etc.), not just a regular space.

$\ = "\n";              
while (<>) {
    chomp;      # strip record separator
    @f = split(/\s+/, $_);
    $f[-1] = " \"" . $f[-1];
    print join($,,@f);
}

Select allOpen in new window

ghostdog74 - that also has the side effect of replacing all groups of spaces with $,.  Even if $, is set to " ", you still replace multiple spaces with a single space.

To all:  For learning/instructional/testing purposes, I am using The Regex Coach - interactive regular expressions(The Regex Coach is Copyright © 2003-2004 Dr. Edmund Weitz - All Rights Reserved. http://weitz.de/regex-coach/) to test solutions presented.  Using REGEX COACH, I have been unable to just find the last space in the line.

I need to simply my initial problem request to two parts.

First part of question, and most significant part.

1)Find last space in line of text.
2)Replace that single space with a single "

Thanks

Mike

Zum Alles:  Test Example.
"Xxxxx X Xx-xxxxxxx","3037 RANDOLPH STREET","Xxxxxxx NE 68510
This REGEX
\s.....$
  highlighs/finds

 68510
I need to find/highlight only the space before the 6.  Or more generalized.  The final space in text string.

Viel Dank

Mike

This works for me in Regex Coach.  Note that there is a sinle space character before the open paren and nothing after the closing paren.

 (?=[^ ]*$)

Select allOpen in new window

Bounsy,

Points are yours.  You answered my primary question, but before I close this out.  Is it possible to find the space using
    \Z  Match only at end of string, or before newline at the end
    \z  Match only at end of string
Also, using REGEX COACH, what is the replace code

to replace space w "

Thanks

Mike

Thanks, Bounsy.  Appreciate your taking time to explain it.

Mike

Bounsy, provided the specific solution I, required, with the same tool I, was using.  Bounsy, also added additional explanation.  Excellent Response.