You can use `\url`

    \usepackage{hyperref}
    \url{http://stackoverflow.com/}

You just need to escape characters that have special meaning: `# $ % &amp; ~ _ ^ \ { }`

So

`http://stack_overflow.com/~foo%20bar#link`

would be

`http://stack\_overflow.com/\~foo\%20bar\#link`

Here is all the information you need in order to format clickable hyperlinks in LaTeX:

http://en.wikibooks.org/wiki/LaTeX/Hyperlinks

Essentially, you use the `hyperref` package and use the `\url` or `\href` tag depending on what you&#39;re trying to achieve.

A minimalist implementation of the `\url` macro that uses only Tex primitives:

    \def\url#1{\expandafter\string\csname #1\endcsname}

This url absolutely won&#39;t break over lines, though; the [hypperef][1] package is better for that.


  [1]: https://www.ctan.org/pkg/hyperref

I have a `&lt;select&gt;` element in HTML. This element represents a drop down list. I&#39;m trying to understand how to iterate through the options in the `&lt;select&gt;` element via JQuery.

How do I use JQuery to display the value and text of each option in a `&lt;select&gt;` element? I just want to display them in an `alert()` box.

Iterate through &lt;select&gt; options

What is the maximum packet size for a TCP connection or how can I get the maximum packet size?

Maximum packet size for a TCP connection

How do you write a URL in Latex? 

The subscripts and everything else make the font look very strange when it compiles.

How to write URLs in Latex?

<p>How do you write a URL in Latex?</p>
<p>The subscripts and everything else make the font look very strange when it compiles.</p>


I came across the following URL today:

    http://www.sfgate.com/cgi-bin/blogs/inmarin/detail??blogid=122&amp;entry_id=64497

Notice the doubled question mark at the beginning of the query string:

    ??blogid=122&amp;entry_id=64497

My browser didn&#39;t seem to have any trouble with it, and running a quick bookmarklet:

    javascript:alert(document.location.search);

just gave me the query string shown above.

Is this a valid URL? The reason I&#39;m being so pedantic (assuming that I am) is because I need to parse URLs like this for query parameters, and supporting doubled question marks would require some changes to my code. Obviously if they&#39;re in the wild, I&#39;ll need to support them; I&#39;m mainly curious if it&#39;s my fault for not adhering to URL standards exactly, or if it&#39;s in fact a non-standard URL.

Is it valid to have more than one question mark in a URL?

I have set up my coldfusion application to have dynamic urls on the page, such as 

    www.musicExplained/index.cfm/artist/:VariableName

However my variable names will sometimes contain slashes, such as 

    www.musicExplained/index.cfm/artist/GZA/Genius

This is causing a problem, because my application presumes that the slash in the variable name represents a different section of the website, the artists albums. So the URL will fail.

I am wondering if there is anyway to prevent this from happening? Do I need to use a function that replaces slashes in the variable names with another character?

slashes in url variables

I&#39;ve just noticed that the long, convoluted Facebook URLs that we&#39;re used to now look like this:

`http://www.facebook.com/example.profile#!/pages/Another-Page/123456789012345`

As far as I can recall, earlier this year it was just a normal URL-fragment-like string (starting with `#`), without the exclamation mark. But now it&#39;s a shebang or hashbang (`#!`), which I&#39;ve previously only seen in shell scripts and Perl scripts.

The [new Twitter](http://blog.twitter.com/2010/09/better-twitter.html) URLs now also feature the `#!` symbols. A Twitter profile URL, for example, now looks like this:

`http://twitter.com/#!/BoltClock`

Does `#!` now play some special role in URLs, like for a certain Ajax framework or something since the new Facebook and Twitter interfaces are now largely Ajaxified?   
Would using this in my URLs benefit my Web application in any way?

What&#39;s the shebang/hashbang (#!) in Facebook and new Twitter URLs for?

I&#39;m building an application to retrieve an image from internet. Even though it works fine, it is slow (on wrong given URL) when using try-catch statements in the application. 

(1) Is this the best way to verify URL and handle wrong input - or should I use Regex (or some other method) instead?

(2) Why does the application try to find images locally if I don&#39;t specify http:// in the textBox?

    private void btnGetImage_Click(object sender, EventArgs e)
    {
        String url = tbxImageURL.Text;
        byte[] imageData = new byte[1];

        using (WebClient client = new WebClient())
        {
            try
            {
                imageData = client.DownloadData(url);
                using (MemoryStream ms = new MemoryStream(imageData))
                {
                    try
                    {
                        Image image = Image.FromStream(ms);
                        pbxUrlImage.Image = image;
                    }
                    catch (ArgumentException)
                    {
                        MessageBox.Show(&quot;Specified image URL had no match&quot;, 
                            &quot;Image Not Found&quot;, MessageBoxButtons.OK, 
                            MessageBoxIcon.Error);
                    }
                }
            }
            catch (ArgumentException)
            {
                MessageBox.Show(&quot;Image URL can not be an empty string&quot;, 
                    &quot;Empty Field&quot;, MessageBoxButtons.OK, 
                    MessageBoxIcon.Information);
            }
            catch (WebException)
            {
                MessageBox.Show(&quot;Image URL is invalid.\nStart with http:// &quot; +
                    &quot;and end with\na proper image extension&quot;, &quot;Not a valid URL&quot;,
                    MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        } // end of outer using statement
    } // end of btnGetImage_Click

**EDIT:**
I tried the suggested solution by Panagiotis Kanavos (thank you for your effort!), but it only gets caught in the if-else statement if the user enters `http://` and nothing more. Changing to UriKind.Absolute catches empty strings as well! Getting closer :)
The code as of now:

    private void btnGetImage_Click(object sender, EventArgs e)
    {
        String url = tbxImageURL.Text;
        byte[] imageData = new byte[1];
        Uri myUri;

        // changed to UriKind.Absolute to catch empty string
        if (Uri.TryCreate(url, UriKind.Absolute, out myUri))
        {
            using (WebClient client = new WebClient())
            {
                try
                {
                    imageData = client.DownloadData(myUri);
                    using (MemoryStream ms = new MemoryStream(imageData))
                    {
                        imageData = client.DownloadData(myUri);
                        Image image = Image.FromStream(ms);
                        pbxUrlImage.Image = image;
                    }
                }
                catch (ArgumentException)
                {
                    MessageBox.Show(&quot;Specified image URL had no match&quot;,
                        &quot;Image Not Found&quot;, MessageBoxButtons.OK, 
                        MessageBoxIcon.Error);
                }
                catch (WebException)
                {
                    MessageBox.Show(&quot;Image URL is invalid.\nStart with http:// &quot; +
                        &quot;and end with\na proper image extension&quot;, 
                        &quot;Not a valid URL&quot;,
                        MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
        }
        else
        {
            MessageBox.Show(&quot;The Image Uri is invalid.\nStart with http:// &quot; +
                &quot;and end with\na proper image extension&quot;, &quot;Uri was not created&quot;,
                MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

I must be doing something wrong here. :(

A better way to validate URL in C# than try-catch?

How do you encode a [URL][1] in Android?

I thought it was like this:

    final String encodedURL = URLEncoder.encode(urlAsString, &quot;UTF-8&quot;);
    URL url = new URL(encodedURL);

If I do the above, the `http://` in `urlAsString` is replaced by `http%3A%2F%2F` in `encodedURL` and then I get a  `java.net.MalformedURLException` when I use the URL.

  [1]: http://en.wikipedia.org/wiki/Uniform_resource_locator


URL encoding in Android

I am trying to write a short paper with LaTeX and need to add a table with 3 columns.

    +-------------+-----------------+--------------------------------------+
    | AAAAAAAAAA  | BBBBBBBBBBBBBBB | Betty Botter Bought a Bit of Butter  |
    |             |                 | but the Butter&#39;s Bitter              |
    +-------------+-----------------+--------------------------------------+
    | CCCCCCCC    | DDDD            | Betty Botter Thought:                |
    |             |                 | If I Put This Bitter Butter in My    |
    |             |                 | Batter it Will Make My Batter Bitter |
    +-------------+-----------------+--------------------------------------+
    
Unfortunately I can&#39;t seem to find the correct idiom to do it.

----
I tried:

    \begin{tabular}{lll} 
        AAAAAAAAAA  &amp; BBBBBBBBBBBBBBB &amp; Betty Botter Bought a Bit of Butter but 
        the Butter&#39;s Bitter  \\
        CCCCCCCC  &amp; DDDD &amp; Betty Botter Thought: \newline If I Put This Bitter Butter in My Batter it Will Make My Batter Bitter
     \end{tabular}
 
But LaTeX doesn&#39;t do any linebreaks or formatting within the cell. I assume I need to tell it to do so.. But how?

How to code tables with multi-line cells

I have a Table (multiple rows, multiple columns, see below ) that is longer than one page. 
How can I tell LaTeX to continue on the next page. 

 - Adding a \newpage didn&#39;t work
 - Manually &#39;ending&#39; and &#39;reopening&#39; the table works, but is very tedious, since the table will be many pages long.

        \begin{tabular}{lp{13cm}} 
            AAAAAAAAAA  &amp; FOOBAR FOOBAR FOOBAR FOOBAR FOOBAR\\
            BBBBBBBBBB  &amp; FOOBAR FOOBAR FOOBAR FOOBAR FOOBAR\\
            CCCCCCCCCC  &amp; FOOBAR FOOBAR FOOBAR FOOBAR FOOBAR\\
          
            ...
    
            ZZZZZZZZZ  &amp;  FOOBAR FOOBAR FOOBAR FOOBAR FOOBAR\\
         \end{tabular}



How to stretch a table over multiple pages

It&#39;s possible to do interesting things with what would ordinarily be thought of as typesetting languages. For example, you can construct the Mandelbrot set [using postscript][1].

It is suggested in [this MathOverflow question][2] that LaTeX may be [Turing-complete][3]. This implies the ability to write arbitrary programs (although it may not be easy!). Does anyone know of any concrete example of such a program in LaTeX, which does something highly unusual with the language?


  [1]: http://warp.povusers.org/MandScripts/ps.html
  [2]: https://mathoverflow.net/questions/18813/modular-arithmetic-in-latex
  [3]: http://en.wikipedia.org/wiki/Turing_completeness

I&#39;ve heard that LaTeX is Turing complete. Are there any programs written in LaTeX?

I&#39;m currently searching for an application or a script that does a **correct** word count for a LaTeX document.

Up till now, I have only encountered scripts that only work on a single file but what I want is a script that can safely ignore LaTeX keywords and also **traverse linked files**...ie follow `\include` and `\input` links to produce a correct word-count for the *whole* document.

With vim, I currently use `ggVGg CTRL+G` but obviously that shows the count for the current file and does not ignore LaTeX keywords.

Does anyone know of any script (or application) that can do this job?

Correct word-count of a LaTeX document

I&#39;m trying to add some code in a presentation made with LaTex. I used beamer, added some frames without problems but once I add the listing, I can&#39;t compile the presentation anymore.

&lt;!-- language-all: lang-latex --&gt;

    \begin{frame}{Code}
    \begin{lstlisting}
    Sample Code
    \end{lstlisting}
    \end{frame}

The error I pdflatex gave me is:

    Package Listings Warning: Text dropped after begin of listing on input line 80.

Is there anything special to add to make it work ?

LaTex, issue with Beamer and Listings

Is there a way to prepend leading zeros to numbers so that it results in a string of fixed length? For example, `5` becomes `&quot;05&quot;` if I specify 2 places.

Content Type	Original Author	Original Content on Stackoverflow
Question	danzig	View Question on Stackoverflow
Solution 1 - Url	zs2020	View Answer on Stackoverflow
Solution 2 - Url	Gabe	View Answer on Stackoverflow
Solution 3 - Url	mandaleeka	View Answer on Stackoverflow
Solution 4 - Url	Charles Stewart	View Answer on Stackoverflow

How to write URLs in Latex?

Url Problem Overview

Url Solutions

Solution 1 - Url

Solution 2 - Url

Solution 3 - Url

Solution 4 - Url

Maximum packet size for a TCP connection

Iterate through <select> options

Attributions