C#
string resultString = Regex.Replace(subjectString, @"(\w+)=(\w+)", "$2=$1");

Regex regexObj = new Regex(@"(\w+)=(\w+)");
string resultString = regexObj.Replace(subjectString, "$2=$1");


VB.NET
Dim ResultString = Regex.Replace(SubjectString, "(\w+)=(\w+)", "$2=$1")

Dim RegexObj As New Regex("(\w+)=(\w+)")
Dim ResultString = RegexObj.Replace(SubjectString, "$2=$1")


Java
String resultString = subjectString.replaceAll("(\\w+)=(\\w+)", "$2=$1");

Pattern regex = Pattern.compile("(\\w+)=(\\w+)");
Matcher regexMatcher = regex.matcher(subjectString);
String resultString = regexMatcher.replaceAll("$2=$1");


JavaScript
result = subject.replace(/(\w+)=(\w+)/g, "$2=$1");


PHP
$result = preg_replace('/(\w+)=(\w+)/', '$2=$1', $subject);


Perl
$subject =~ s/(\w+)=(\w+)/$2=$1/g;


Python
result = re.sub(r"(\w+)=(\w+)", r"\2=\1", subject)

reobj = re.compile(r"(\w+)=(\w+)")
result = reobj.sub(r"\2=\1", subject)


Ruby
result = subject.gsub(/(\w+)=(\w+)/, '\2=\1')
