Regex is my weak skills. How to check by regex following strings:
http://www.facebook.com/johnsmith
http://www.facebook.com/profile.php?id=100000111111111
http://www.facebook.com/people/John-Smith/100000111111111
so, only similar strings should be valid, rest are invalid. How to do it?
I think I see what you mean.
var url = "http://www.facebook.com/profile.php?id=100000111111111";
(/^http:[/][/]www[.]facebook[.]com[/]((profile[.]php[?]id=[0-9]{15}|people).*$|[A-za-z]*$)/).test(url);
would something like that work?
Start with a simple tutorial and use an online tester to ensure you get the regex correct. Once you've got the basics, refer to this cheatsheet to try new features.
You may need to be much more specific in what you do and don't want to match. For example, asking to match http://www.facebook.com/johnsmith suggests that the user's name consists of letters, but are numbers and symbols valid?
var matchUserLink = function(name, id, s) {
var baseUrl = 'http://www.facebook.com/';
s = "" + s;
return (s == (baseUrl + name.toLowerCase().replace(/\W/g, ''))) ||
(s == (baseUrl + 'profile.php?id=' + id)) ||
(s == (baseUrl + 'people/' + name.replace(/\W/g, '-') + '/' + id));
};
var js='John Smith', id=101, fb='http://www.facebook.com/';
matchUserLink(js, id, fb+'johnsmith'); // => true
matchUserLink(js, id, fb+'profile.php?id=101'); // => true
matchUserLink(js, id, fb+'people/John-Smith/101'); // => true
