Javascript RegEx Regular Expression
These are a few handy javascript regular expressions functions, also for AJAX applications - RegEx'es in perl or PHP
are very common, but when it comes to javascript it is slightly different and the resources
on the net are quite scarce.
Matching a string (PHP: preg_match ; Perl s///):
mystring = "captain";
if (mystring.match(/cap.*?/)) {
alert("match");
}
Spliting a string with regular expressions (Perl/PHP: split):
mystring = "captain|was|here";
myarray = mystring.split(/\|/);
for (var i = 0; i < myarray.length; i++) {
alert(myarray[i]);
}
Replacing a string (PHP: preg_replace):
mystring = "captain was here";
myregexp = /was here/;
newstring = mystring.replace(myregexp, "is the best");
alert(newstring);
Using the RegExp object for matching and detecting the matches themselfs:
var regex = new RegExp("cap(.*?) (.*?) here");
var match = regex.exec("captain was here");
if (match == null) {
alert("No match");
} else {
var string = "matched at position " + match.index + ":\n";
string = string + "string matched: " + match[0] + "\n";
if (match.length > 0) {
for (var i = 1; i < match.length; i++) {
string = string + match[i] + "\n";
}
}
alert(string);
}
Last-Modified: Sat, 04 Feb 2006 16:03:08 GMT
