`\d` is a digit (a character in the range 0-9), and `+` means 1 or more times.  So, `\d+` is 1 or more digits.

This is about as simple as regular expressions get.  You should try reading up on regular expressions a little bit more.  Google has a lot of results for [regular expression tutorial][1], for instance.  Or you could try using a tool like the free [Regex Coach][2] that will let you enter a regular expression and sample text, then indicate what (if anything) matches the regex.


  [1]: http://www.google.com/search?q=regular+expression+tutorial
  [2]: http://www.weitz.de/regex-coach/

`\d` is called a character class and will match digits. It is equal to `[0-9]`.

`+` matches 1 or more occurrences of the character before.

So `\d+` means match 1 or more digits.

`\d` means &#39;digit&#39;. `+` means, &#39;1 or more times&#39;. So `\d+` means one or more digit. It will match `12` and `1`.

\d is a digit, + is 1 or more, so a sequence of 1 or more digits

Background
----------

I&#39;m working on an application which requires user-entered content, and I&#39;ve decided to use a Stack Overflow-style Markdown editor. After researching this topic for the last few days, I realize there are numerous forks of the base WMD editor, some with a few basic enhancements and some with serious differences from the Stack Overflow one.

Since this will be the heart of the application, I&#39;d like to start with the best code base I can. I&#39;d be happy if anyone can recommend which one of the many solutions out there best fits my needs.

Below are requirements, plus what I&#39;ve managed to find already. I&#39;m hoping this question will help me decide which version to go with, and maybe help me discover a port that&#39;s an even better fit for my needs.

----------

The requirements for my project
-------------------------------

 - Live preview
 - Multiple editors on the same page (I do not know how many in advance, since the user can dynamically add another editing box).
 - Ability to extend with extra buttons (I&#39;d like a button to upload a picture, instead of just adding an `img` URL).
 - Ability to dynamically show/hide the edit box (and only see the preview box).
 - Not an absolute must, but I&#39;d prefer to stick as close to Stack Overflow&#39;s look and feel, since it&#39;s well known.
 - Don&#39;t know if this matters, but the backend is written in Django.

Editors I&#39;ve looked at
----------------------

Here are a few of the code bases I&#39;ve looked at, with thoughts. Obviously, I might be missing another solution out there.

 - The [derobins][1] version. From what I can tell, this is the official Stack Overflow version. Seems like it doesn&#39;t support multiple editors on one page.
 - [jQuery.MarkEdit][2]. Looks very good, but is pretty different from the Stack Overflow version.
 - [MooWMD][3]. Looks like the winner right now, but I&#39;m a little concerned since it looks less active/hackable than MarkEdit.
 - The [wmd-new][4] version. Not sure, looks like an old codebase without much use.
 - The [SocialSite branch][5]. Seems like it&#39;s not for public use.

  [1]: http://github.com/derobins/wmd
  [2]: http://github.com/tstone/jquery-markedit
  [3]: http://moowmd.awardspace.info/moowmd-tutorial.html
  [4]: http://code.google.com/p/wmd-new/
  [5]: http://github.com/ananthakumaran/wmd/


Which Stack-Overflow style Markdown (WMD) JavaScript editor should we use?

I&#39;ve got a two-dimensional array,

    string[,] table = {
                           { &quot;aa&quot;, &quot;aaa&quot; },
                           { &quot;bb&quot;, &quot;bbb&quot; }
                       };

And I&#39;d like to `foreach` through it like this,

    foreach (string[] row in table)
    {
        Console.WriteLine(row[0] + &quot; &quot; + row[1]);
    }

But, I get the error:

&gt; Can&#39;t convert type string to string[]

Is there a way I can achieve what I want, i.e. iterate through the first dimension of the array with the iterator variable returning me the one-dimensional array for that row?



How do I &#39;foreach&#39; through a two-dimensional array?

I&#39;m new to regular expressions and came accros the following \d+ . I do not exactly know what this means, please point me in the right direction.

What does \d+ mean in regular expression terms?

<p>I'm new to regular expressions and came accros the following \d+ . I do not exactly know what this means, please point me in the right direction.</p>


can I do something like that? to pass arguments to my function? I already studied [add_action doc][1] but did not figure out how to do it. What the exact syntax to pass two arguments would look like. In particular how to pass **text &amp; integer arguments**.

    function recent_post_by_author($author,$number_of_posts) {
      some commands;
    }
    add_action(&#39;thesis_hook_before_post&#39;,&#39;recent_post_by_author&#39;,10,&#39;author,2&#39;)

**UPDATE**

it seems to me that it is done somehow through [do_action][2] but how? :-)


  [1]: http://codex.wordpress.org/Function_Reference/add_action
  [2]: http://codex.wordpress.org/Function_Reference/do_action

can I pass arguments to my function through add_action?

I want to be able create stored procedures using `phpMyAdmin` and later on use it through php. 

### But I dont know how to?

From what I know, I found out that we cannot manage stored procedures through `phpMyAdmin`.

**What other tool can manage stored procedure?**

I am not even sure if it is better option to use stored procedure through PHP. *Any suggestion?*



How to write a stored procedure using phpmyadmin and how to use it through php?

So we got this function in PHP 

    strcmp(string $1,string $2) // returns -1,0, or 1;

We Do not however, have an intcmp(); So i created one:

    function intcmp($a,$b) {
        if((int)$a == (int)$b)return 0;
        if((int)$a  &gt; (int)$b)return 1;
        if((int)$a  &lt; (int)$b)return -1;
    }

This just feels dirty.  What do you all think?

this is part of a class to sort Javascripts by an ordering value passed in.

    class JS
    {
        // array(&#39;order&#39;=&gt;0,&#39;path&#39;=&gt;&#39;/js/somefile.js&#39;,&#39;attr&#39;=&gt;array());
        public $javascripts = array(); 
        ...
        public function __toString()
        {
            uasort($this-&gt;javascripts,array($this,&#39;sortScripts&#39;));
            return $this-&gt;render();
        }
        private function sortScripts($a,$b)
        {
            if((int)$a[&#39;order&#39;] == (int)$b[&#39;order&#39;]) return 0;
            if((int)$a[&#39;order&#39;] &gt; (int)$b[&#39;order&#39;]) return 1;
            if((int)$a[&#39;order&#39;] &lt; (int)$b[&#39;order&#39;]) return -1;
        }
        ....
    }

strcmp equivelant for integers (intcmp) in PHP

I have just installed Debian Lenny with Apache, MySQL, and PHP and I am receiving a PDOException `could not find driver`.

This is the specific line of code it is referring to:

`$dbh = new PDO(&#39;mysql:host=&#39; . DB_HOST . &#39;;dbname=&#39; . DB_NAME, DB_USER, DB_PASS)`

`DB_HOST`, `DB_NAME`, `DB_USER`, and `DB_PASS` are constants that I have defined. It works fine on the production server (and on my previous Ubuntu Server setup).

Is this something to do with my PHP installation?

Searching the internet has not helped, all I get is experts-exchange and examples, but no solutions.

PDOException “could not find driver”

It seems to me that they have both the same function set, but I&#39;m not sure.

What are the differences in functionality between the two?

XDebug or Zend Debugger?

&gt; **Possible Duplicate:**  
&gt; [Javascript regex returning true.. then false.. then true.. etc](https://stackoverflow.com/questions/2630418/javascript-regex-returning-true-then-false-then-true-etc)  

&lt;!-- End of automatically inserted text --&gt;

    var r = /\d/g;
    var a = r.test(&quot;1&quot;); // will be true
    var b = r.test(&quot;1&quot;); // will be false
    console.log(a == b); // will be false

Please explain to me why the result of `r.test(&quot;1&quot;)` alternates with each call?

I was able to work around the issue I was having by removing the g modifier. However I would still like to understand why this happens.


why does my javascript regex.test() give alternating results

I&#39;m not too sure how to do this.  I need to validate email addresses using regex with something like this:

    [a-z0-9!#$%&amp;&#39;*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&amp;&#39;*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|com|org|net|edu|gov|mil|biz|info|mobi|name|aero|asia|jobs|museum)

Then I need to run this in a jQuery function like this:   

    $j(&quot;#fld_emailaddress&quot;).live(&#39;change&#39;,function() { 
    var emailaddress = $j(&quot;#fld_emailaddress&quot;).val();
    
    // validation here? 
    
    if(emailaddress){}
    
    // end validation
    
    $j.ajax({  
            type: &quot;POST&quot;,  
             url: &quot;../ff-admin/ff-register/ff-user-check.php&quot;,  
            data: &quot;fld_emailaddress=&quot;+ emailaddress,  
            success: function(msg)
            { 
    			if(msg == &#39;OK&#39;) { 
    			$j(&quot;#fld_username&quot;).attr(&#39;disabled&#39;,false); 
    			$j(&quot;#fld_password&quot;).attr(&#39;disabled&#39;,false); 
    			$j(&quot;#cmd_register_submit&quot;).attr(&#39;disabled&#39;,false); 
    			$j(&quot;#fld_emailaddress&quot;).removeClass(&#39;object_error&#39;); // if necessary
    			$j(&quot;#fld_emailaddress&quot;).addClass(&quot;object_ok&quot;);
    			$j(&#39;#email_ac&#39;).html(&#39;&amp;nbsp;&lt;img src=&quot;img/cool.png&quot; align=&quot;absmiddle&quot;&gt; &lt;font color=&quot;Green&quot;&gt; Your email &lt;strong&gt;&#39;+ emailaddress+&#39;&lt;/strong&gt; is OK.&lt;/font&gt;  &#39;);
    			} else {  
    			$j(&quot;#fld_username&quot;).attr(&#39;disabled&#39;,true); 
    			$j(&quot;#fld_password&quot;).attr(&#39;disabled&#39;,true); 
    			$j(&quot;#cmd_register_submit&quot;).attr(&#39;disabled&#39;,true);  
    			$j(&quot;#fld_emailaddress&quot;).removeClass(&#39;object_ok&#39;); // if necessary
    			$j(&quot;#fld_emailaddress&quot;).addClass(&quot;object_error&quot;);
    			$j(&#39;#email_ac&#39;).html(msg);
    			}
            }
    	 });
    });

Where does the validation go and what is the expression?

Validating email addresses using jQuery and regex

How do I write a switch for the following conditional?

If the url **contains** &quot;foo&quot;, then `settings.base_url` is &quot;bar&quot;.

The following is achieving the effect required but I&#39;ve a feeling this would be more manageable in a switch:

    var doc_location = document.location.href;
	var url_strip = new RegExp(&quot;http:\/\/.*\/&quot;);
	var base_url = url_strip.exec(doc_location)
	var base_url_string = base_url[0];

	//BASE URL CASES

	// LOCAL
	if (base_url_string.indexOf(&#39;xxx.local&#39;) &gt; -1) {
		settings = {
			&quot;base_url&quot; : &quot;http://xxx.local/&quot;
		};
	}

	// DEV
	if (base_url_string.indexOf(&#39;xxx.dev.yyy.com&#39;) &gt; -1) {
		settings = {
			&quot;base_url&quot; : &quot;http://xxx.dev.yyy.com/xxx/&quot;
		};
	}

Switch statement for string matching in JavaScript

The following should be matched:

    AAA123
    ABCDEFGH123
    XXXX123

can I do: `&quot;.*123&quot;` ?



How to match &quot;any character&quot; in regular expression?

Looking for quick, simple way in Java to change this string 

    &quot; hello     there   &quot;

to something that looks like this

    &quot;hello there&quot;

where I replace all those multiple spaces with a single space, except I also want the one or more spaces at the beginning of string to be gone.

Something like this gets me partly there

    String mytext = &quot; hello     there   &quot;;
    mytext = mytext.replaceAll(&quot;( )+&quot;, &quot; &quot;);

but not quite.


Content Type	Original Author	Original Content on Stackoverflow
Question	Elitmiar	View Question on Stackoverflow
Solution 1 - Php	Mark Rushakoff	View Answer on Stackoverflow
Solution 2 - Php	Jakub Hampl	View Answer on Stackoverflow
Solution 3 - Php	Harmen	View Answer on Stackoverflow
Solution 4 - Php	Mark Baker	View Answer on Stackoverflow

What does \d+ mean in regular expression terms?

Php Problem Overview

Php Solutions

Solution 1 - Php

Solution 2 - Php

Solution 3 - Php

Solution 4 - Php

How do I 'foreach' through a two-dimensional array?

Which Stack-Overflow style Markdown (WMD) JavaScript editor should we use?

Attributions