If you are asking about the machine name of the host that served up the current page, you can find that with

    window.location.hostname

If you are asking about the name of the machine that is displaying the page in a browser, that information is restricted by browsers for security purposes.

You can use `document.domain` to get domain name.


`window.location.host`

**EDIT:** If you meant the domain of the client machine, I don&#39;t think it is possible.

Is there a simple way to format numbers in JavaScript, similar to the formatting methods available in C# (or VB.NET) via `ToString(&quot;format_provider&quot;)` or `String.Format()`?

Format numbers in JavaScript similar to C#

I&#39;m facing a problem that seems to have no straighforward solution.

I&#39;m using `java.util.Map`, and I want to update the value in a Key-Value pair.

Right now, I&#39;m doing it lik this:

    private Map&lt;String,int&gt; table = new HashMap&lt;String,int&gt;();
    public void update(String key, int val) {
        if( !table.containsKey(key) ) return;
        Entry&lt;String,int&gt; entry;
        for( entry : table.entrySet() ) {
            if( entry.getKey().equals(key) ) {
                entry.setValue(val);
                break;
            }
        }
    }

So is there any method so that I can get the required `Entry` object without having to iterate through the entire `Map`? Or is there some way to update the entry&#39;s value in place? Some method in `Map` like `setValue(String key, int val)`?

jrh

Updating a java map entry

Is there a way to obtain the domain name of the current page by using javascript in a browser (IE, FireFox, etc) ?

How to obtain Domain name via JavaScript?

<p>Is there a way to obtain the domain name of the current page by using javascript in a browser (IE, FireFox, etc) ?</p>


What is the best cross browser way to open a download dialog (let&#39;s assume we can set content-disposion:attachment in the headers) without navigating away from the current page, or opening popups, which doesn&#39;t work well in Internet Explorer(IE) 6.

Easiest way to open a download window without navigating away from the page

What is the best way to determine if a form on an ASPX page is valid in JavaScript?  

I am trying to check the validation of an user control that was opened using the JavaScript `window.showModalDialog()` and checking the &#39;Page.IsValid&#39; property on the server side does not work.  I am using ASP.NET validation controls for page validation. 

Determine if page is valid in JavaScript - ASP.NET

I wrote a regex to fetch string from HTML, but it seems the multiline flag doesn&#39;t work.

This is my pattern and I want to get the text in `h1` tag.

    var pattern= /&lt;div class=&quot;box-content-5&quot;&gt;.*&lt;h1&gt;([^&lt;]+?)&lt;\/h1&gt;/mi
    m = html.search(pattern);
    return m[1];

I created a string to test it. When the string contains &quot;\n&quot;, the result is always null. If I removed all the &quot;\n&quot;s, it gave me the right result, no matter with or without the `/m` flag.

What&#39;s wrong with my regex?



JavaScript regex multiline text between two tags

What is the best way to compare objects in JavaScript?

Example:

    var user1 = {name : &quot;nerd&quot;, org: &quot;dev&quot;};
    var user2 = {name : &quot;nerd&quot;, org: &quot;dev&quot;};
    var eq = user1 == user2;
    alert(eq); // gives false

I know that **two objects are equal if they refer to the exact same object**, but is there a way to check if they have the same attributes&#39; values?

The following way works for me, but is it the only possibility?

    var eq = Object.toJSON(user1) == Object.toJSON(user2);
    alert(eq); // gives true

Object comparison in JavaScript

From technical perspective the only issue is traffic and incoming links (one of them should redirect to another). 

Now I need to choose which one should be primary. Some sites have www (google, microsoft, ruby-lang) and some without www (stackoverflow, github). Seems to me the newer do not use WWW.

What to choose?

Please with some explanations.

UPDATE: This is programming related question. Actually site is for programmers, so I expect to see what techy people think.

UPDATE: Site without WWW is clear winner. Thank you guys!

WWW or not WWW, what to choose as primary site name?

I&#39;m building a website using Django. The website could have a significant number of users from non-English speaking countries.

I just want to know if there are any technical restrictions on what types of characters an email address could contain.

Are email addresses only allowed to contain English letters, numbers, `_`, `@` and `.`?

Are they allowed to contain non-English alphabets like `&#233;` or `&#252;`?

Are they allowed to contain Chinese or Japanese or other Unicode characters?

Are email addresses allowed to contain non-alphanumeric characters?

Is there any Linux command to translate a domain name to an IP address?

Linux command to translate domain name to IP

I want to get the domain name for where the script is running. How can that be done with PHP?
I see that `$_SERVER[&#39;HTTP_HOST&#39;]` as well as `$_SERVER[&#39;SERVER_NAME&#39;]` contain this information.
Will that variable always work and should I use one over the other?

Thank you.

PHP get domain name

I need to validate a domain name:

**google.com**

**stackoverflow.com**

So a domain in its rawest form - not even a subdomain like www.

 1. Characters should only be **a-z** | **A-Z** | **0-9** and **period**(.) and **dash**(-)
 2. The domain name part should not start or end with dash (-) *(e.g. -google-.com)*
 3. The domain name part should be between 1 and 63 characters long
 4. &lt;strike&gt;The extension (TLD) can be anything under #1 rules for now, I may validate them against a list later, it should be 1 or more characters though&lt;/strike&gt;

&lt;strike&gt;Edit: TLD is apparently 2-6 chars as it stands&lt;/strike&gt;

**no. 4 revised:** TLD should actually be labelled &quot;subdomain&quot; as it should include things like .co.uk -- I would imagine the only validation possible (apart from checking against a list) would be &#39;after the first dot there should be one or more characters under rules #1

Thanks very much, believe me I did try!

Content Type	Original Author	Original Content on Stackoverflow
Question	Ashutosh Nasikkar	View Question on Stackoverflow
Solution 1 - Javascript	Mike Clark	View Answer on Stackoverflow
Solution 2 - Javascript	Bob	View Answer on Stackoverflow
Solution 3 - Javascript	Chetan S	View Answer on Stackoverflow

How to obtain Domain name via JavaScript?

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Solution 2 - Javascript

Solution 3 - Javascript

Updating a java map entry

Format numbers in JavaScript similar to C#

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