use warnings;
use strict;

my $str = "It is very  very cold now";

$str =~ s/(?<! ) (?! )//g;
print $str;

[download]

Prints Itisvery  verycoldnow which I doubt is what you want, but is what you asked for.

Perl is Huffman encoded by design.

In reply to Re: Regular Expressions: Removing 'only' single spaces from a string by GrandFather
in thread Regular Expressions: Removing 'only' single spaces from a string by BioBoy

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