 - `/` - Site root
 - `~/` - Root directory of the application

The difference is that if you site is:

    http://example.com

And you have an application `myapp` on:

    http://example.com/mydir/myapp

`/` will return the root of the site (`http://example.com`),

`~/` will return the root of the application (`http://example.com/mydir/`).

The second won&#39;t work because its not a recognised path by anything except asp.net code on the server side.  And since your link tag is regular html and not a server control it never gets processed.

If you add `runat=&quot;server&quot;` in your link tag then it would works perfectly....

like this....

    &lt;link href=&quot;~/common/black_theme/css/style.css&quot; rel=&quot;stylesheet&quot; runat=&quot;server&quot;&gt; 
(this is also working)

I would like to know why Perlin noise is still so popular today after Simplex came out. Simplex noise was made by Ken Perlin himself and it was suppose to take over his old algorithm which was slow for higher dimensions and with better quality (no visible artifacts).

Simplex noise came out in 2001 and over those 10 years I&#39;ve only seen people talk of Perlin noise when it comes to generating heightmaps for terrains, creating procedural textures, et cetera.

Could anyone help me out, is there some downside of Simplex noise? I heard rumors that Perlin noise is faster when it comes to 1D and 2D noise, but I don&#39;t know if it&#39;s true or not.

Thanks!

Simplex noise vs Perlin noise

I am quite new to SF2 and I was wondering how I could manage connections to severals databases into ONE bundle.
For the moment I have this solution - which works fine - but I don&#39;t know if it is the right way to do it....

in myBundle\Ressource\config\config.yml :

    doctrine:
    dbal:
        default_connection:       default
        connections:
            default:
                dbname:           SERVER
                user:             root
                password:         null
                host:             localhost
            client:
                dbname:           CLIENT_134
                user:             root
                password:         null
                host:             localhost
    orm:
        default_entity_manager:   default
        entity_managers:
            default:
                connection:       default
                mappings:
                    MyBundle: ~
            client:
                connection:       client
                mappings:
                    MyBundle: ~
	
   
And then, in order to switch to one of the BD or the other, I do : 

    $O_ressource=  $this-&gt;get(&#39;doctrine&#39;)-&gt;getEntityManager(&#39;client&#39;);
    $O_ressource=  $this-&gt;get(&#39;doctrine&#39;)-&gt;getEntityManager(&#39;default&#39;);


So guys, do you think it is a good way to manage this?


And my second question is :

how to set up dynamic database connection?
I mean I have 100 databases in my system and I can&#39;t set all them in my config.yml file.
So I would like to be able to change database on the fly.

Thanks for the help!

Symfony 2 : multiple and dynamic database connection

ASP.NET offers two ways to specify paths for style sheets:

```
&lt;link href=&quot;/common/black_theme/css/style.css&quot; rel=&quot;stylesheet&quot;&gt;   (this is working)
&lt;link href=&quot;~/common/black_theme/css/style.css&quot; rel=&quot;stylesheet&quot;&gt;  (this is not working)
```

- How are these paths resolved?
- Why are the generated paths different?
- Which one should I pick in which case?

As per my knowledge, `~` represents the root directory of the application.
&quot;common&quot; is the folder below the website root (named `testsite.demo`) in IIS.

Physical path: `D:\Physicalpath\WarpFirstSite\testsite.demo`&lt;br&gt;
&quot;common&quot; folder: `D:\Physicalpath\WarpFirstSite\testsite.demo\common`





Slash (/) vs tilde slash (~/) in style sheet path

ASP.NET offers two ways to specify paths for style sheets:
<pre><code class="hljs language-kotlin">&#x3C;link href="/common/black_theme/css/style.css" rel="stylesheet"> (this is working)
&#x3C;link href="~/common/black_theme/css/style.css" rel="stylesheet"> (this is not working)
</code></pre>
<ul>
<li>How are these paths resolved?</li>
<li>Why are the generated paths different?</li>
<li>Which one should I pick in which case?</li>
</ul>
As per my knowledge, <code>~</code> represents the root directory of the application.
"common" is the folder below the website root (named <code>testsite.demo</code>) in IIS.
Physical path: <code>D:\Physicalpath\WarpFirstSite\testsite.demo</code> 
"common" folder: <code>D:\Physicalpath\WarpFirstSite\testsite.demo\common</code>

I have One DataTable with 5 Columns and 10 Rows.
     Now I want to add one New Column to the DataTable and I want to assign DropDownList value to the New Column.
     So the DropDownList value should be added 10 times to the New Column.
     How to do this?
Note: Without using FOR LOOP.

For Example: My Existing DataTable is like this.

       ID             Value
      -----          -------
        1              100
        2              150

Now I want to add one New Column &quot;CourseID&quot; to this DataTable.
I have One DropDownList. Its selected value is 1.
So My Existing Table should be like below:

        ID              Value         CourseID
       -----            ------       ----------
        1                100             1
        2                150             1
How to do this?

How to add New Column with Value to the Existing DataTable?

Can someone explain in less than 2 sentences the difference between both? Yes, I know google can provide hundreds of answers but not one in 2 clear sentences:)


HTTP handler vs HTTP module

Any ideas what this problem is? cheers

![enter image description here][1]


  [1]: http://i.stack.imgur.com/8XSEN.png

The relative virtual path &#39;&#39; is not allowed here

I am very new to RoR and I want to select between APS.NET MVC3 and RoR. C# is sure easier for me as I have been doing it for so long but I am wondering if there is any point to consider using RoR over .MVC to develop a real world website? 

What else do I get with RoR which I can&#39;t get with ASP.NET MVC 3 that worth spending the time to master RoR? I though the available community RoR plug-in would be one reason but it does not seem that organized and seems like the learning curve to do the right things is going to be so big that it won&#39;t practically save much time for a newby! I could be wrong here and I really appreciate your real-life comment on this? Mind you that I still have to learn ASP.NET MVC but that sounds quick for a .NET Guy!

What could RoR offer to a .NET guy that **WORTH** picking RoR over ASP.NET MVC 3? and please the practical advices! :)

Ruby on Rails vs ASP.NET MVC 3 for a .NET Guy?

What is the difference between the `Cache.Add()` and `Cache.Insert()` methods?

In which situations should I use each one?

ASP.NET cache add vs insert

I have a data structure like this :

    var someObject = {
        &#39;part1&#39; : {
            &#39;name&#39;: &#39;Part 1&#39;,
            &#39;size&#39;: &#39;20&#39;,
            &#39;qty&#39; : &#39;50&#39;
        },
        &#39;part2&#39; : {
            &#39;name&#39;: &#39;Part 2&#39;,
            &#39;size&#39;: &#39;15&#39;,
            &#39;qty&#39; : &#39;60&#39;
        },
        &#39;part3&#39; : [
            {
                &#39;name&#39;: &#39;Part 3A&#39;,
                &#39;size&#39;: &#39;10&#39;,
                &#39;qty&#39; : &#39;20&#39;
            }, {
                &#39;name&#39;: &#39;Part 3B&#39;,
                &#39;size&#39;: &#39;5&#39;,
                &#39;qty&#39; : &#39;20&#39;
            }, {
                &#39;name&#39;: &#39;Part 3C&#39;,
                &#39;size&#39;: &#39;7.5&#39;,
                &#39;qty&#39; : &#39;20&#39;
            }
        ]
    };

And I would like to access the data using these variable :

    var part1name = &quot;part1.name&quot;;
    var part2quantity = &quot;part2.qty&quot;;
    var part3name1 = &quot;part3[0].name&quot;;

part1name should be filled with `someObject.part1.name` &#39;s value, which is &quot;Part 1&quot;. Same thing with part2quantity which filled with 60.

Is there anyway to achieve this with either pure javascript or JQuery?

Accessing nested JavaScript objects and arrays by string path

In my script I need the **directory** of the file I am working with.  For example, the *file*=**&quot;stuff/backup/file.zip&quot;**. I need a way to get the string &quot;**stuff/backup/**&quot; from the variable `$file`. 



Extract directory from path

Does anyone know how to add another folder to the asset pipeline in Rails 3.1?

I&#39;d like to serve `app/assets/fonts` the same way `app/assets/images` is served.

- - - - -
**Update: 5-7-2013**

Just to add some clarification for future people who find this question to explicitly add an asset path, in your application.rb file:

    config.assets.paths &lt;&lt; &quot;#{Rails.root}/app/assets/fonts&quot;

However, since the above path is under `app/assets` you don&#39;t have to add it explicitly, you just need to restart your rails app so Sprockets can pick it up.

You will have to explicitly add paths that are outside of `app/assets`,`lib/assets`, or `vendor/assets`, and just remember that while Sprockets picks up new files in folders that were present when your application loaded, in my experience it does not pick up new folders in the asset paths without a restart.

Add a new asset path in Rails 3.1

Basically, I know I can go through my control panel and modify the path variable. But, I&#39;m wondering if there is a way to through batch programming have a temporary path included? That way it is only used during that batch file execution. I don&#39;t want to have people go in and modify their path variables just to use my batch file.

How to add a set path only for that batch file executing?

For new applications written in Java 7, is there any reason to use a [`java.io.File`][2] object any more or can we consider it deprecated? 

I believe a [`java.nio.file.Path`][1] can do everything a [`java.io.File`][2] can do and more.


  [1]: http://download.oracle.com/javase/7/docs/api/java/nio/file/Path.html
  [2]: http://download.oracle.com/javase/7/docs/api/java/io/File.html

Java: Path vs File

I&#39;m experiencing a minor issue with fonts in my stylesheet.

This is my CSS:

    body
    {
      ...
      font: normal 62.5% &quot;Lucida Sans Unicode&quot;,sans-serif;
    }

    #wrapper_page
    {
      ...
      font-size: 1.2em;
    }

    input, select, textarea
    {
      ...
      font: bold 100% &quot;Lucida Sans Unicode&quot;,sans-serif;
    }

And this is the result:

![browser password fields][1]


  [1]: http://i.stack.imgur.com/SAa0Q.png

I think there is an internal css setting, somewhere, on webkits  that modify the shape of the password dots. How can I get rid of it and have the same style on every browser?

Thanks!

EDIT: I just found something curious: by default, webkit browsers apply this CSS to password fields:

    input[type=&quot;password&quot;]
    {
      -webkit-text-security: disc;
    }

And that&#39;s what is replacing the classic middot.
I tried setting it to circle or none, but I cannot get something similar to what is shown by other browsers.

EDIT: I FOUND A SOLUTION.
If you are using &quot;Lucida Sans Unicode&quot; font for your website, that&#39;s the problem! The only font that emulate correctly the password field&#39;s big dots of other browsers is Verdana, mixed with a little bit of letter spacing. So, for both Opera and Webkit, use the following code to fix it: 

    .opera input[type=&quot;password&quot;],
    .webkit input[type=&quot;password&quot;]
    {
      font: large Verdana,sans-serif;
      letter-spacing: 1px;
     }

Styling Password Fields in CSS

When I begin writing text in the textarea, I want the outer div, with a class box, to have its border turned solid instead of dashed, but somehow the :focus doesn&#39;t apply in this case. If it works with :active, how come it doesn&#39;t work with :focus?

Any ideas why?

(Note. I want the DIV&#39;s border to turn solid, NOT the textareas)

    div.box
    {
        width: 300px;
        height: 300px;
        border: thin dashed black;
    }
    
    div.box:focus{
        border: thin solid black;
    }

    &lt;div class=&quot;box&quot;&gt;
        &lt;textarea rows=&quot;10&quot; cols=&quot;25&quot;&gt;&lt;/textarea&gt;
    &lt;/div&gt;

Using :focus to style outer div?

I am having a problem with removing linebreaks after the `&lt;h1&gt;` tag, as everytime it prints, it adds a line break straight after it, so something like `&lt;h1&gt;Hello World!&lt;/h1&gt; &lt;h2&gt;Hello Again World!&lt;/h2&gt;` prints out like this:

    Hello World!

    Hello Again World!

I am unsure on what tags I need to change in CSS, but I expect it&#39;s something to do with the padding or margins

I also want to keep the vertical padding if at all possible.

Removing newline after &lt;h1&gt; tags?

In an HTML header, I&#39;ve got this:

    &lt;head&gt;
    &lt;title&gt;Title&lt;/title&gt;
    &lt;link href=&quot;styles.css&quot; rel=&quot;stylesheet&quot; type=&quot;text/css&quot;/&gt;
    &lt;link href=&quot;master.css&quot; rel=&quot;stylesheet&quot; type=&quot;text/css&quot;/&gt;
&lt;/head&gt;

`styles.css` is my page-specific sheet. `master.css` is a sheet I use on each of my projects to override browser defaults. Which of these stylesheets takes priority?
Example: first sheet contains specific

    body { margin:10px; }

And associated borders, but the second contains my resets of 

    html, body:not(input=&quot;button&quot;) {
        margin: 0px;
        padding: 0px;
        border: 0px;
    }

In essence, does the cascading element of CSS work the same in terms of stylesheet references as it does in typical CSS functions? Meaning that the last line is the one displayed?

In which order do CSS stylesheets override?

I&#39;ve read conflicting information regarding Internet Explorer&#39;s silly CSS limits. I am (think I am) understanding that you can only have 31 `&lt;style&gt;` and `&lt;link&gt;` tags (combined), and that each sheet can have up to 31 `@import`-s (so 31 `&lt;link&gt;`-s, each to 31 `@import`-s is fine, albeit insane).

However, the 4095 rule is less clear - is this 4095 rules per document, or per sheet? For instance, can I `&lt;link&gt;` to two stylesheets, each with 4000 rules, and have it work, or will this break the limit?

### 3rd party edit 2018

On this [msdn blog post stylesheet-limits-in-internet-explorer][1] further information is given.


  [1]: https://blogs.msdn.microsoft.com/ieinternals/2011/05/14/stylesheet-limits-in-internet-explorer/

Internet Explorer&#39;s CSS rules limits

Suppose my python code is executed a directory called `main` and the application needs to access `main/2091/data.txt`.

how should I use `open(location)`? what should the parameter `location` be?

I found that below simple code will work.. does it have any disadvantages?


    file = &quot;\2091\sample.txt&quot;
    path = os.getcwd()+file
    fp = open(path, &#39;r+&#39;);



Open file in a relative location in Python

I&#39;m having trouble understanding the ruleset regarding PHP relative include paths.  If I run file A.PHP- and file A.PHP includes file B.PHP which includes file C.PHP, should the relative path to C.PHP be in relation to the location of B.PHP, or to the location of A.PHP?  That is, does it matter which *file* the include is called from, or only what the current working directory is- and what determines the current working directory?





Are PHP include paths relative to the file or the calling code?

I have a folder for my client code, a folder for my server code, and a folder for code that is shared between them

    Proj/
        Client/
            Client.py
        Server/
            Server.py
        Common/
            __init__.py
            Common.py

How do I import Common.py from Server.py and Client.py?

Importing from a relative path in Python

I am examining some code for a friend, and have found that the developer who built his site began each and every relative `src`, `href`, and `include` with a forward slash `/`. 

For example:

    src=&quot;/assets/js/jquery.js&quot;


I have never seen this before. So my question is, why would a developer place a forward slash `/` at the start of a relative path?

Why would a developer place a forward slash at the start of each relative path?

I have a **relative file path** (for example &quot;/res/example.xls&quot;) and I would like to get an **InputStream** Object of that file from that path. 

I checked the `JavaDoc` and did not find a constructor or method to get such an InputStream from a path/

Anyone has any idea? Please let me know!

InputStream from relative path

As arguments to my script there are some file paths.  Those can, of course, be relative (or contain ~). But for the functions I&#39;ve written I need paths that are absolute, but do not have their symlinks resolved.

Is there any function for this?

Expand a possible relative path in bash

How do I get the absolute paths of all the files in a directory that could have many sub-folders in Python?

I know `os.walk()` recursively gives me a list of directories and files, but that doesn&#39;t seem to get me what I want. 

Get absolute paths of all files in a directory

I have a folder with ten files in it which I want to loop through. When I print out the name of the file my code works fine:

    import os
    indir = &#39;/home/des/test&#39;
    for root, dirs, filenames in os.walk(indir):
        for f in filenames:
            print(f)

Which prints:

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10

But if I try to open the file in the loop I get an IO error:

    import os
    indir = &#39;/home/des/test&#39;
    for root, dirs, filenames in os.walk(indir):
        for f in filenames:
            log = open(f, &#39;r&#39;)

    Traceback (most recent call last):
    File &quot;/home/des/my_python_progs/loop_over_dir.py&quot;, line 6, in &lt;module&gt;
    log = open(f, &#39;r&#39;)
    IOError: [Errno 2] No such file or directory: &#39;1&#39;
    &gt;&gt;&gt; 

Do I need to pass the full path of the file even inside the loop to `open()` them?

Do I need to pass the full path of a file in another directory to open()?

So, an *absolute path* is a way to get to a certain file or location describing the full route to it, the full path, and it&#39;s OS dependent (the absolute paths for Windows and Linux, for example, are different). A *relative path*, on the other hand, is a route to a file or location which is described from the current location `..` (two dots) indicating a superior level in the directories tree. That has been clear to me for several years now.

When searching I&#39;ve even seen that there are canonicalized files too!
All I know is that CANONICAL means something like &quot;according to the rules&quot; or something.

Can somebody enlighten me in therms of theory about canonical stuff?

What&#39;s a &quot;canonical path&quot;?

I have two files in two different directories, one is `&#39;/home/test/first/first.pdf&#39;`, the other is `&#39;/home/text/second/second.pdf&#39;`. I use following code to compress them:

    import zipfile, StringIO
    buffer = StringIO.StringIO()
    first_path = &#39;/home/test/first/first.pdf&#39;
    second_path = &#39;/home/text/second/second.pdf&#39;
    zip = zipfile.ZipFile(buffer, &#39;w&#39;)
    zip.write(first_path)
    zip.write(second_path)
    zip.close()

After I open the zip file that I created, I have a `home` folder in it, then there are two sub-folders in it, `first` and `second`, then the pdf files. I don&#39;t know how to include only two pdf files instead of having full path zipped into the zip archive. I hope I make my question clear, please help. 

Content Type	Original Author	Original Content on Stackoverflow
Question	Kyasa Madhavi	View Question on Stackoverflow
Solution 1 - asp.net	Oded	View Answer on Stackoverflow
Solution 2 - asp.net	CRice	View Answer on Stackoverflow
Solution 3 - asp.net	Gaurav Agrawal	View Answer on Stackoverflow

Slash (/) vs tilde slash (~/) in style sheet path

asp.net Problem Overview

asp.net Solutions

Solution 1 - asp.net

Solution 2 - asp.net

Solution 3 - asp.net

Symfony 2 : multiple and dynamic database connection

Simplex noise vs Perlin noise

Attributions