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Arguments
RegExp
Required. The global RegExp object.
Remarks
The initial value of the lastParen property is an empty string. The value of the lastParen property changes whenever a successful match is made.
Note The properties of the RegExp object are not available when running in fast mode, the default for JavaScript .NET. To compile a program from the command line that uses these properties, you must turn off the fast option by using /fast-. It is not safe to turn off the fast option in ASP.NET because of threading issues.
Example
The following example illustrates the use of the lastParen property:
var s; //Declare variable.
var re = new RegExp("d(b+)(d)","ig"); //Regular expression pattern.
var str = "cdbBdbsbdbdz"; //String to be searched.
var arr = re.exec(str); //Perform the search.
s = "$1 returns: " + RegExp.$1 + "\n";
s += "$2 returns: " + RegExp.$2 + "\n";
s += "$3 returns: " + RegExp.$3 + "\n";
s += "input returns : " + RegExp.input + "\n";
s += "lastMatch returns: " + RegExp.lastMatch + "\n";
s += "leftContext returns: " + RegExp.leftContext + "\n";
s += "rightContext returns: " + RegExp.rightContext + "\n";
s += "lastParen returns: " + RegExp.lastParen + "\n";
print(s); //Return results.
After compiling this program with the /fast- option, the output of this program is:
$1 returns: bB
$2 returns: d
$3 returns:
input returns : cdbBdbsbdbdz
lastMatch returns: dbBd
leftContext returns: c
rightContext returns: bsbdbdz
lastParen returns: d
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