The text after the colon is an identifier for an &quot;Alternate Data Stream&quot;. ADS is used to store meta-information about the file. For example, the Zone identifier stores whether the file was downloaded from the internet. 

Some specific info: [About URL Security Zones][5], [Zone.Identifier Stream Name][6]

Best is to google around for more information. Eg. [this][1], [this][2] and [this][3].

Finally, here&#39;s [Streams][4], the Sysinternals tool for ADS.




  [1]: http://technet.microsoft.com/en-us/library/cc976808.aspx
  [2]: http://www.heysoft.de/en/information/ntfs-ads.php?lang=EN
  [3]: https://stackoverflow.com/questions/1809725/ntfs-alternate-data-streams
  [4]: https://technet.microsoft.com/en-us/sysinternals/streams.aspx
  [5]: http://msdn.microsoft.com/en-us/library/ms537183.aspx
  [6]: https://msdn.microsoft.com/en-us/library/dn392609.aspx

I am using the JSON library provided here http://www.json.org/java/index.html to convert a json string I have to CSV.
But the problem I have is, the order of the keys is lost after conversion.

This is the conversion code:

        JSONObject jo = new JSONObject(someString);
        JSONArray ja = jo.getJSONArray(&quot;items&quot;);
        String s = CDL.toString(ja);
        System.out.println(s);

This is the content of &quot;someString&quot;:

    {
        &quot;items&quot;:
        [
            {
                &quot;WR&quot;:&quot;qwe&quot;,
                &quot;QU&quot;:&quot;asd&quot;,
                &quot;QA&quot;:&quot;end&quot;,
                &quot;WO&quot;:&quot;hasd&quot;,
                &quot;NO&quot;:&quot;qwer&quot;
            },
        ]
    }

This is the result:

    WO,QU,WR,QA,NO
    hasd,asd,qwe,end,qwer

While what I expect is to keep the order of the keys:

    WR,QU,QA,WO,NO
    qwe,asd,end,hasd,qwer

Is there any way I can have this result using this library? If not, is there any other library that will provide the capability to keep the order of keys in the result?

Keep the order of the JSON keys during JSON conversion to CSV

In my application, I have a `UIWebview` that loads linkedin auth page for login. When user logs in, cookies saves into the application.

My app has a logout button that is not related to linkedin login. So when user clicks on this button, he logs off from the app. I want that this log off will clear his linkedin cookies also from the app, so that user will log out completely.



How to delete all cookies of UIWebView?

I often see files named &#39;blabla.exe:Zone.Identifier&#39; when monitoring I/O with Process Monitor.  
The files are seen on network-drives.

![alt text][1]

- What are `Zone.Identifier` files?
- What does the colon mean in the filename?
- Is the colon related the file&#39;s extended attributes?
- How do I prevent these files from being created when I copy code files from Windows Explorer to a WSL directory?


  [1]: http://i.stack.imgur.com/92l8S.png

What are `Zone.Identifier` files, and how do I prevent them from being created?

I often see files named 'blabla.exe:Zone.Identifier' when monitoring I/O with Process Monitor. 
The files are seen on network-drives.
<img src="http://i.stack.imgur.com/92l8S.png" alt="alt text">
<ul>
<li>
What are <code>Zone.Identifier</code> files?
</li>
<li>
What does the colon mean in the filename?
</li>
<li>
Is the colon related the file's extended attributes?
</li>
<li>
How do I prevent these files from being created when I copy code files from Windows Explorer to a WSL directory?
</li>
</ul>

I am reading about exception handling. I got some information about what exception handling is, but I have a few questions:

1. When to throw an exception?
2. Instead of throwing an exception, can we use a return value to indicate the error?
3. If I protect all my functions by try-catch blocks, won&#39;t it reduce the performance?
4. When to use exception handling?
5. I saw a project where each and every function in that project contained a try-catch block (i.e. code inside the entire function is surrounded by try-catch block). Is this a good practice?
6. What is the difference between try-catch and __try __except?


When and how should I use exception handling?

I&#39;m using VirtualEnv on Windows XP. I&#39;m wondering if I have my brain wrapped around it correctly:

I ran `virtualenv ENV` and it created `C:\WINDOWS\system32\ENV`. I then changed my `PATH` variable to include `C:\WINDOWS\system32\ENV\Scripts` instead of `C:\Python27\Scripts`. Then, I checked out Django into `C:\WINDOWS\system32\ENV\Lib\site-packages\django-trunk`, updated my `PYTHON_PATH` variable to point the new Django directory, and continued to `easy_install` other things (which of course go into my new `C:\WINDOWS\system32\ENV\Lib\site-packages` directory). 

I understand why I should use VirtualEnv so I can run multiple versions of Django, and other libraries on the same machine, but does this mean that to switch between environments I have to basically change my `PATH` and `PYTHON_PATH` variable? So, I go from developing one Django project which uses Django 1.2 in an environment called `ENV` and then change my `PATH` and such so that I can use an environment called `ENV2` which has the dev version of Django?

Is that basically it, or is there some better way to automatically do all this (I could update my path in Python code, but that would require me to write machine-specific code in my application)?

Also, how does this process compare to using VirtualEnv on Linux (I&#39;m quite the beginner at Linux).

Python virtualenv questions

How do you compile assembly code using Visual Studio?

I want to compile and run an assembly source file in [Visual&amp;nbsp;Studio&amp;nbsp;2010][1].

I&#39;ve created a Visual C++ project and inserted some assembly code in a file `code.asm`:

    .586              ;Target processor.  Use instructions for Pentium class machines
    .MODEL FLAT, C    ;Use the flat memory model. Use C calling conventions
    .STACK            ;Define a stack segment of 1KB (Not required for this example)
    .DATA             ;Create a near data segment.  Local variables are declared after
                      ;this directive (Not required for this example)
    .CODE             ;Indicates the start of a code segment.
    
    clear PROC
       xor eax, eax 
       xor ebx, ebx 
       ret 
    clear ENDP 
    END

However the problem is when you try and compile this, you get:

    LINK : error LNK2001: unresolved external symbol _mainCRTStartup

I did go and enable the build customization `masm.targets` (right click project &amp;gt; Build Customizations..), but to no avail.

  [1]: http://en.wikipedia.org/wiki/Microsoft_Visual_Studio#Visual_Studio_2010


Compiling assembly in Visual Studio

I had two versions of Python installed on my machine (versions 2.6 and 2.5). I want to run 2.6 for one project and 2.5 for another. 

How can I specify which I want to use?

I am working on Windows XP SP2.

How to run multiple Python versions on Windows

I have a folder in `C:\Folder1`

I want to copy all the contents of `Folder1` to another location, `D:\Folder2`

How do I do this using a batch file?

copying all contents of folder to another folder using batch file?

For reading, there is the useful abstraction `Source`. How can I write lines to a text file?


How to write to a file in Scala?

I would like to append a new line to an existing file without erasing the current information of that file. In short, here is the methodology that I am using the current time: 

    import java.io.BufferedWriter;
    import java.io.FileWriter;
    import java.io.Writer;

    Writer output;
    output = new BufferedWriter(new FileWriter(my_file_name));  //clears file every time
    output.append(&quot;New Line!&quot;);
    output.close();

The problem with the above lines is simply they are erasing all the contents of my existing file then adding the new line text. 

I want to append some text at the end of the contents of a file without erasing or replacing anything.

How to add a new line of text to an existing file in Java?

I want to change a couple of files at one time, __iff__ I can write to all of them. I&#39;m wondering if I somehow can combine the multiple open calls with the `with` statement:

    try:
      with open(&#39;a&#39;, &#39;w&#39;) as a and open(&#39;b&#39;, &#39;w&#39;) as b:
        do_something()
    except IOError as e:
      print &#39;Operation failed: %s&#39; % e.strerror

If that&#39;s not possible, what would an elegant solution to this problem look like?

How can I open multiple files using &quot;with open&quot; in Python?

How can we append text in a file via a one-line command without using io redirection?

Append text to file from command line without using io redirection

It seems there are different ways to read and write data of files in Java.

I want to read ASCII data from a file. What are the possible ways and their differences?

Reading a plain text file in Java

It seems that `ls` doesn&#39;t sort the files correctly when doing a recursive call:

    ls -altR . | head -n 3


How can I find the most recently modified file in a directory (including subdirectories)?

How to recursively find the latest modified file in a directory?

When you do 

    cat some-symlink-to-some-real-file

it shows the contents of the real file, not what is within the symlink itself. Is there a way to see what&#39;s actually in it?


is there a way to see the actual contents of a symlink?

Most people use the terms &quot;folder&quot; and &quot;directory&quot; interchangeably. From a programmer point of view, is there a difference, and if so, what is it? Does it depend on the OS, or is there a broad, general consensus?

This [contribution under _English UI Terminology: Directory, or Folder?_][1] at least suggests that there is a difference.

  [1]: https://stackoverflow.com/questions/1191381/english-ui-terminology-directory-or-folder/1195096#1195096

What is the difference between a directory and a folder?

My database is about 25 MB, and I&#39;ve verified that the username accessing it, as well as the file permissions haven&#39;t changed in months. I&#39;m having a problem where queries are failing due to a &quot;database or disk is full&quot; and then sometimes &quot;database disk image is malformed&quot; issue.

Unless I&#39;m reading this wrong, my disk isn&#39;t anywhere near full (this is an Ubuntu server, 9.10, if it makes any difference)

    Filesystem           1K-blocks      Used Available Use% Mounted on
    /dev/sda1             19610300   2389596  16224560  13% /
    udev                     10240       128     10112   2% /dev
    none                    254136         0    254136   0% /dev/shm
    none                    254136        36    254100   1% /var/run
    none                    254136         0    254136   0% /var/lock
    none                    254136         0    254136   0% /lib/init/rw

As a test I just did an action that added a new record, and it&#39;s fine. I&#39;m trying to fiqure out if there&#39;s a specific set of actions that are failing. However, after the insert (and verifying that it&#39;s there) the number of bytes on disk for the database has not changed (neither up nor down).

Using the command line utility results in something like the following, which is failing spectacularly :)

    SQLite version 3.6.12
    Enter &quot;.help&quot; for instructions
    Enter SQL statements terminated with a &quot;;&quot;
    sqlite&gt; pragma integrity_check;
    *** in database main ***
    On tree page 2 cell 0: 2nd reference to page 26416
    On tree page 2 cell 1: 2nd reference to page 26417
    On tree page 2 cell 2: 2nd reference to page 26434
    On tree page 2 cell 3: 2nd reference to page 26449
    On tree page 2 cell 4: 2nd reference to page 26464
    On tree page 2 cell 5: 2nd reference to page 26358
    On tree page 2 cell 6: 2nd reference to page 26494
    On tree page 2 cell 7: Child page depth differs
    On tree page 2 cell 8: 2nd reference to page 26190
    On tree page 2 cell 8: Child page depth differs
    
    ... etc., etc. ...


Any ideas on where I should be looking next? Is there a problem with the maximum number of rows in a table or something? I did some reading on SQLite3 max values, and nothing in my database is anything close to them as far as I can tell.

I then took a look at my daily backups, and I see that the database backup hasn&#39;t changed in file size for 3-4 days - very strange. I restored a backup copy of the database from before the time it was not changing in file size, and still getting strange issues.

I&#39;m thinking I&#39;m going to have to (1) restore from an older backup, and (2) re-run my Rails migrations to fix.


SQLite3 database or disk is full / the database disk image is malformed

How do I delete a certain file in linux if its size is 0. I want to execute this in an crontab without any extra script.

    l filename.file | grep 5th-tab | not eq 0 | rm

Something like this?

Content Type	Original Author	Original Content on Stackoverflow
Question	Benjamin	View Question on Stackoverflow
Solution 1 - Windows	Zabba	View Answer on Stackoverflow

What are `Zone.Identifier` files, and how do I prevent them from being created?

Windows Problem Overview

Windows Solutions

Solution 1 - Windows

How to delete all cookies of UIWebView?

Keep the order of the JSON keys during JSON conversion to CSV

Attributions