Do `:help magic` in vim and you&#39;ll see there are four levels (very magic, magic, nomagic, and very nomagic) but only the two central ones can be set globally (the default is magic, and with `:set` commands you can only toggle between magic and nomagic); start your RE with `\v` to make all the rest of it &quot;very magic&quot; (&quot;all ASCII characters except &#39;0&#39;-&#39;9&#39;, &#39;a&#39;-&#39;z&#39;, &#39;A&#39;-&#39;Z&#39; and &#39;_&#39; have a special meaning&quot;) -- but that applies only to that one specific RE!-)


A workaround is to remap / to prefix searches with &quot;very magic&quot; automatically:

    nnoremap / /\v
    vnoremap / /\v

Let&#39;s say I wanted to define an interface which represents a call to a remote service. Now, the call to the remote service generally returns something, but might also include input parameters. Suppose that an implementing class will typically only implement one service method. Given the above information, is the following a poor design (it doesn&#39;t quite feel right):

    public interface IExecutesService&lt;A,B&gt;
    {
        public A executeService();
        public A executeService(B inputParameter);
    }

Now, let&#39;s say that I implement this interface with a class that executes a remote service with an input parameter:

    public class ServiceA implements IExecutesService&lt;String,String&gt;
    {
      public String executeService()
      {
        //This service call should not be executed by this class
        throw new IllegalStateException(&quot;This method should not be called for this class...blabla&quot;);
      }

      public String executeService(String inputParameter)
      {
        //execute some service
      }

I have two questions regarding the above:

 1. Is the use of a generic interface (`IExecutesService&lt;A,B&gt;`) good in the case where you want to provide subclasses which require different input parameters and return types for the interface methods?
 2. How can I do the above better? I.e. I want to group my service executors under a common interface (`IExecutesService`); however, an implementing class will typically only implement one of the methods, and the use of an IllegalStateException feels really ugly. Also, the B type parameter in `IExecutesService&lt;A,B&gt;` will be redundant for an implementing class that calls a service without any input parameters. It also seems overkill creating two separate interfaces for the two different service calls.


Generic Interface

I have a shape with a gradient that I&#39;m using as a divider between `ListView` items.  I&#39;ve defined it as follows:

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
    &lt;shape
        xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
        android:shape=&quot;rectangle&quot;&gt;

    &lt;gradient
        android:startColor=&quot;#ccd0d3&quot;
        android:centerColor=&quot;#b6babd&quot;
        android:endColor=&quot;#ccd0d3&quot;
        android:height=&quot;1px&quot;
        android:angle=&quot;0&quot; /&gt;

    &lt;/shape&gt;

I would like to add 6 pixels of padding on either side of the gradient, so that it doesn&#39;t extend from edge to edge of the screen.

However, no matter where I put an `android:left=&quot;6px&quot;` and `android:right=&quot;6px&quot;`, it doesn&#39;t seem to take effect.  I can put it in the `&lt;shape&gt;` element, the `&lt;gradient&gt;` element, or in a separate `&lt;padding&gt;` child of `&lt;shape&gt;`, and it doesn&#39;t change anything.

How can I add padding on the left and right of my list divider?

How to add padding to gradient &lt;shape&gt; in Android?

The characters for extended regular expressions are invaluable; is there a way to turn them on so that I don&#39;t have to escape them in my Vim regex, much like the `-E` flag I can pass to grep(1)?

Can I turn on extended regular expressions support in Vim?

<p>The characters for extended regular expressions are invaluable; is there a way to turn them on so that I don't have to escape them in my Vim regex, much like the <code>-E</code> flag I can pass to grep(1)?</p>


Suppose I have a string like - &quot;you can enter maximum 500 choices&quot;.
I need to extract `500` from the string.

The main problem is the String may vary like &quot;you can enter maximum 12500 choices&quot;.
So how to get the integer part?

How to find a number in a string using JavaScript?

I&#39;m looking for a regular expression to validate hex colors in ASP.NET C# and  
am also looking code for validation on server side.

For instance: `#CCCCCC`


How to identify a given string is hex color format

I am trying to write a [regular expression][1] that will only allow lowercase letters and up to 10 characters. What I have so far looks like this:

    pattern: /^[a-z]{0,10}+$/ 

This does not work or compile. I had a working one that would just allow lowercase letters which was this:

    pattern: /^[a-z]+$/ 

But I need to limit the number of characters to 10.

  [1]: http://en.wikipedia.org/wiki/Regular_expression


Regular expression to limit number of characters to 10

I need to use `Regex.Replace` to remove all numbers and signs from a string.

Example input: `123- abcd33`  
Example output: `abcd`

How to remove numbers from string using Regex.Replace?

I want to replace the last String which is a `,` with `)`.

Suppose the string is:

&gt; Insert into dual (name,date,

It is to be converted to:

&gt; Insert into dual (name,date)





Replace the last part of a string

I&#39;m working at a project on a remote server. I don&#39;t want to have the swap files on the server.  I would like  all swap files for Vim (and, of course, gVim) to be saved on the specified directory. How could I do that? 

How to change the folder path for swp files in Vim

I&#39;d like to try the plugin for Vim linked below. It adds syntax highlighting for `.haml` and (perhaps) `.sass` files.

[http://github.com/tpope/vim-haml][2]

I did this...

    $ cd ~/.vim
    $ git clone git://github.com/tpope/vim-haml.git

I opened a `.haml` file in Vim, but there&#39;s no highlighting. There must be another step I need to perform.

  [1]: http://www.vim.org/scripts/script.php?script_id=1433
  [2]: http://github.com/tpope/vim-haml

How do I install a plugin for vim?

Depending on my task in Vim I have several tabs open.

How can I save different sessions for later use?

How to save and restore multiple different sessions in Vim?

I&#39;m working with the Vim 7.2 that comes with Mac OS 10.6.1 (Leopard), using the Mac&#39;s &quot;Terminal&quot; app. I&#39;d like to use a fancy color scheme. I did this...

    :syntax on

Then this...

    :colorscheme slate

    :colorscheme elflord

    :colorscheme desert

    etc...

Syntax highlighting is working, but I&#39;m finding that regardless of the scheme I choose, the only colors displayed are the basic Red, Blue, Cyan, Gray, etc.

Is there a way to get the Terminal app to display a larger collection of colors to allow some more subtle schemes?

How can I activate Vim color schemes in OS X&#39;s Terminal?

I usually:

1. Choose the needed file.
2. Open it in a tab(t character, by default).

But how I can jump back to NERDTree to open one more file in a tab?

Temporary solution I use now in my .vimrc file:

    map &lt;F10&gt; :NERDTree /path/to/root/of/my/project

But it&#39;s not very useful to start navigation again and again from the root directory.

How to jump back to NERDTree from file in tab?

I have a Java command-line program. I would like to create JUnit test case to be able to simulate `System.in`. Because when my program runs it will get into the while loop and waits for input from users. How do I simulate that in JUnit?

Thanks

JUnit: How to simulate System.in testing?

Is is possible to print the execution time of a shell command with following combination?

    root@hostname:~# &quot;command to execute&quot; &amp;&amp; echo &quot;execution time&quot;

Print execution time of a shell command

I&#39;m new to Git and the terminal. How can I exit a listing mode generated by the `git status` command?

How to exit a &#39;git status&#39; list in a terminal?

I am solving my C assignment in Xcode and in that program i have to give command line arguments when running the program and for this i have to user terminal like this:

    ./a.out myfirstCommand mySecondCommand

I was wondering if it possible to give these kind of commands within xcode instead of going to terminal. Thanks

Giving Command line arguments in Xcode in C program

How can I create an empty file at the DOS/Windows command-line?

I tried:

    copy nul &gt; file.txt

But it always displays that a file was copied.

Is there another method in the standard cmd?

It should be a method that does not require the [touch][1] command from Cygwin or any other nonstandard commands.
The command needs to run from a script, so keystrokes cannot be used.

  [1]: http://en.wikipedia.org/wiki/Touch_%28Unix%29



Content Type	Original Author	Original Content on Stackoverflow
Question	Drew Stephens	View Question on Stackoverflow
Solution 1 - Regex	Alex Martelli	View Answer on Stackoverflow
Solution 2 - Regex	Stephen Niedzielski	View Answer on Stackoverflow

Can I turn on extended regular expressions support in Vim?

Regex Problem Overview

Regex Solutions

Solution 1 - Regex

Solution 2 - Regex

How to add padding to gradient <shape> in Android?

Generic Interface

Attributions