We Keep Coding

Internal Site Search Jquery against a RegExp

Where am I going wrong? Even one error would help please.
I have an HTML input and a submit button. The idea is to:
Submit search string
Get string value.
Compare string value to regex.
If legit, find instances of the string in the DOM.
Then scroll to the first instance of the matched string as it sits in the DOM.
$("#submit").on("click", function () {
//regex to be compared against
var search = new RegExp();
search = /(^\w[A-z]+)$|(^\d[0-9\.x\.X\.m\.M]+)/;
//grab the string value from the search input
var userin = $("#searchin").val();
var compare = userin.test(search);
if (compare === true) {
var treebody = $('html, body').contents().filter(function (userin) {
if ($('html, body').contents() === userin) {
$('html, body').animate({'scrollTop' : $(treebody).position().top}, 700)
} else {
alert("Please search again or scroll down to find your desired content");
}
});
} else {
alert("Sorry, we couldn't match your search. Please try a region or place or a billboard size e.g. 9x13 ");
}
});

Change the line
var compare = userin.test(search);
it should be
var compare = search.test(userin);
Also check you regular expression. Here is a good reference RegEx.

jQuery Validation plugin custom method using regex

I need to make a new method for jQuery Validator and don't know where to start.
I would like it check that the email entered includes: '#specificdomain.com'.
But that it is also the very last part of the input. For example #specificdomain.comChris would not do.
<script type="text/javascript">
jQuery.validator.addMethod("mustinclude", function(value, element) {
return this.optional(element) || value == ?
}, "must include #specificdomain.com at the end of the text input");
$(document).ready(function(){ .....
So far I've only come across value == value.match(), hence this is where I've got stuck.
Cheers Chris
jQuery.validator.addMethod('matchDomain', function(value, element) {
var s=value;
var split = s.split('#');
var regex = /^([a-zA-Z0-9_.+-])+$/;
var s2="#allcoles.com";
var optionalValue = this.optional(element);
if (optionalValue) {
return optionalValue;
}
if(regex.test(split[0]) && s2.equals(split[1]))
{
return true;
}
else
{
return false;
}
}, 'Please specify a #allcoles.com email');

The following worked for me:
jQuery.validator.addMethod('matchDomain', function(value, element) {
var s=value;
var split = s.split('#');
var regex = /^([a-zA-Z0-9_.+-])+$/;
**var s2="allcoles.com";** //The split array is the domain excluding the #
**var optionalValue = this.optional(element);** //This is how other methods in alternativeMethods.js Validator handle this.
**//Debugging - This is useful to see visually what is happening
//alert(split[0]); // Shows the inputted username i.e chris or smokey
//alert(split[1]); // Shows the inputted domain
//alert(regex.test(split[0])); //Shows unfilled inputs problem or bad characters, true if good, false if bad
//alert(s2 == split[1]);** // Shows if the inputted domain matches variable s2, if it does we get a true
if (optionalValue) {
return optionalValue;
}
**if(regex.test(split[0]) && (s2 == split[1]))** // has to be == not equals
{
return true;
}
else
{
return false;
}
}, 'Please specify a #allcoles.com email');

var s="abc#specificdomain.com"; OR var s=value;
var split = s.split('#');
var regex = /^([a-zA-Z0-9_.+-])/;
var s2="#specificdomain.com";
if(regex.test(split[0]) && s2 == split[1])
return true;
else
return false;

Regex to add a space after the fourth chars Javascript

I have a string which is a car number plate. But for display purposes I what to add a space after the fourth char in this string. The data comes from a data service so I have to do this on the front-end
eg. AF13BXP to this AF13 BXP
The code below doesn't seem to work:
var $regtext = $('#regNumber');
if ($regtext.length > 0)
{
var regtext = $regtext.text(),
newRegtext = regtext.replace(/[\n\s]/g, '');
console.log(newRegtext);
}

Simple and clear way to do this, without regex:
var $regtext = $('#regNumber');
if ($regtext.length > 0)
{
var regtext = $regtext.text(),
newRegtext = regtext.substr(0, 4) + " " + regtext.substr(4);
console.log(newRegtext);
}
It's also pretty fast too: runs 10,000 times in 351ms, faster than splitting and joining etc. Good if you'll be processing loads of data from the webservice.

You can use following jquery : Demo
$('.test').keyup(function() {
var foo = $(this).val().split(" ").join("");
if (foo.length > 0) {
foo = foo.match(new RegExp('.{1,4}', 'g')).join(" ");
}
$(this).val(foo);
});

If you want to use regex the following should do it.
newRegtext = regtext.replace(/^(.{4})/,'$1 ')

Try this code
$(document).ready(function(e) {
var $regtext = $('#regNumber');
var $regtext = $regtext.text();
if ($regtext.length > 0)
{
regCheck = /^([A-Z1-9a-z]{1,4})([A-Z1-9a-z]*)$/;
regtext = regCheck.test($regtext);
newRegtext = $regtext.replace(regCheck,"$1 $2");
alert(newRegtext);
}
});

Validate email as you type

I want to validate input as I type so I use onkeyup event to do so, but if I validate an email regex "name#domain.com", as soon as user starts to type it throws an error - first character doesnt match regex...
So I wrote this:
var addValidation = function (patterns) {
var index = patterns.length; //I know I can avoid this
while (index--) {
patterns[index] = new RegExp(patterns[index]);
}
index = 0;
var current = patterns[index],
matchExact = function (patt, str) {
var match = str.match(patt);
return match !== null && str === match[0];
};
return function () {
var str = this.value;
if (!matchExact(current, str) ) {
var tmp = patterns[index + 1] ?
new RegExp(current.source + patterns[index + 1].source) :
false;
if (tmp && matchExact(tmp, str)) {
current = tmp;
index++;
}
else {
alert("Wrong");
}
}
}
};
document.getElementById("x").onkeyup = addValidation(["[a-zA-Z0-9\\.]+", "#{1}", "[a-zA-Z0-9]+", "\\.{1}", "[a-zA-Z]{1,3}"]);
It seems to work, but... it's ugly and it will alert you if you do step back (eg. "name#" and you press backspace).
I know that Dojo's validation is great, but I do not want to use Dojo. Are there any better ways to achieve that?
//EDIT: http://livedocs.dojotoolkit.org/dijit/form/ValidationTextBox this is an example, but you can define your own pattern (like email regex) and it will validate it perfectly.

Add interval before validation will start:
var t;
document.getElementById("x").onkeyup = function () {
if (t) {
clearTimeout(t);
}
t = setTimeout(function () {
//do validation
}, 1000)
}

Don't ever try to validate an email address with a regualr expression. You'll either end up allowing addresses which are not valid, or block email addresses which are perfectly valid and just annoy your visitors. It's also worth bearing in mind that the best regex so far for validating email addresses is this:
http://www.ex-parrot.com/pdw/Mail-RFC822-Address.html

Regex to extract domain and video id from youtube/vimeo url

I am copying a function that will take a youtube/vimeo url and return what site the video came from (vimeo/yt) as well as the video id.
Here's what I have so far: http://jsfiddle.net/csjwf/181/
<strong>Result:</strong>
<div id="result"></div>
function parseVideoURL(url) {
url.match(/^http:\/\/(?:.*?)\.?(youtube|vimeo)\.com\/(watch\?[^#]*v=(\w+)|(\d+)).+$/);
return {
provider : RegExp.$1,
id : RegExp.$1 == 'vimeo' ? RegExp.$2 : RegExp.$3
}
}
var result = document.getElementById("result");
var video = parseVideoURL("http://www.youtube.com/watch?v=PQLnmdOthmA&feature=feedrec_grec_index");
result.innerHTML = "Provider: " + video.provider + "<br>ID: " + video.id;
var video = parseVideoURL("http://vimeo.com/22080133");
result.innerHTML += "<br>--<br>Provider: " + video.provider + "<br>ID: " + video.id;
Output:
Result:
Provider: youtube
ID: PQLnmdOthmA
--
Provider: vimeo
ID: 2208013
However, notice how for vimeo vids, if the url ends in the ID, the last number is always cut off. If you add a slash to the end of the vimeo url the id is pulled fully.

The .+$ at the end is requiring at least one character after the last digit that is captured as a string of digits. That will chop one digit off what is captured. Is there a reason you have that there?
You can change the last + to a * like this:
/^http:\/\/(?:.*?)\.?(youtube|vimeo)\.com\/(watch\?[^#]*v=(\w+)|(\d+)).*$/
or even better, get rid of the end part entirely since it doesn't look like it's needed:
/^http:\/\/(?:.*?)\.?(youtube|vimeo)\.com\/(watch\?[^#]*v=(\w+)|(\d+))/
Here's a bit safer way to write your function that allows for any order of the query parameters in the youtube URL and doesn't put stuff into the regex that doesn't need to be there. The code is longer, but it's much more robust and would be much easier to add more providers:
function parseVideoURL(url) {
function getParm(url, base) {
var re = new RegExp("(\\?|&)" + base + "\\=([^&]*)(&|$)");
var matches = url.match(re);
if (matches) {
return(matches[2]);
} else {
return("");
}
}
var retVal = {};
var matches;
if (url.indexOf("youtube.com/watch") != -1) {
retVal.provider = "youtube";
retVal.id = getParm(url, "v");
} else if (matches = url.match(/vimeo.com\/(\d+)/)) {
retVal.provider = "vimeo";
retVal.id = matches[1];
}
return(retVal);
}
Working version here: http://jsfiddle.net/jfriend00/N2hPj/

Here is an updated version that also works with youtu.be and youtube.com/embed urls using #jfriend00's code and some code found here: JavaScript REGEX: How do I get the YouTube video id from a URL?.
EDIT: Updated my answer (and the fiddle) with a function that actually works. :-)
function parseVideoURL(url) {
function getParm(url, base) {
var re = new RegExp("(\\?|&)" + base + "\\=([^&]*)(&|$)");
var matches = url.match(re);
if (matches) {
return(matches[2]);
} else {
return("");
}
}
var retVal = {};
var matches;
var success = false;
if ( url.match('http(s)?://(www.)?youtube|youtu\.be') ) {
if (url.match('embed')) { retVal.id = url.split(/embed\//)[1].split('"')[0]; }
else { retVal.id = url.split(/v\/|v=|youtu\.be\//)[1].split(/[?&]/)[0]; }
retVal.provider = "youtube";
var videoUrl = 'https://www.youtube.com/embed/' + retVal.id + '?rel=0';
success = true;
} else if (matches = url.match(/vimeo.com\/(\d+)/)) {
retVal.provider = "vimeo";
retVal.id = matches[1];
var videoUrl = 'http://player.vimeo.com/video/' + retVal.id;
success = true;
}
if (success) {
return retVal;
}
else { alert("No valid media id detected"); }
}
And a working jsfiddle: http://jsfiddle.net/9n8Nn/3/
Out of the two stackexchange answers, this is the code that worked best for me in the end.

To simplify your regex I would use haystack.indexOf(needle) to determine if the url is vimeo or youtube and then apply site specific regex. Much easier, and later you can add video sites without overly complicating the regex.

Last number gets cut off because you're using ".+" at the end, which means "one or more of any character". Replace the + with a *, meaning "zero or more".

url.match(/^http:\/\/(?:.*?)\.?(youtube|vimeo)\.com\/(watch\?[^#]*v=(\w+).+|(\d+))$/);

Remove the last . and the end matching
url.match(/^http:\/\/(?:.*?)\.?(youtube|vimeo)\.com\/(watch\?[^#]*v=(\w+)|(\d+))/);