You should be pointing it towards the `Developer` directory, not the Xcode application bundle.  Run this:

    sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer

With recent versions of Xcode, you can go to *Xcode* ➙ *Preferences…* ➙ *Locations* and pick one of the options for Command Line Tools to set the location.

An `User` has one `Package` associated with it. Many users can refer to the same package. `User` cannot exists without a `Package` defined. `User` should own the relation. Relation is bidirectional, so a `Package` has zero or more users in it. 

These requirements lead to `ManyToOne` relation for `User` and `OneToMany` relation of `Package` in Doctrine 2. However `package_id` in `user` table (that is foreign-key) allows `null` values. I&#39;ve tried setting `nullable=false` but command:

     php app/console doctrine:generate:entities DL --path=&quot;src&quot; --no-backup

Says that there is no attribute `nullable` for the relation `ManyToOne`. **What i&#39;m missing?**

    class User
    {
    
        /**
         * @ORM\Id
         * @ORM\Column(type=&quot;integer&quot;)
         * @ORM\GeneratedValue(strategy=&quot;AUTO&quot;)
         */
        private $id;
    
        /**
         * @ORM\ManyToOne(targetEntity=&quot;Package&quot;, inversedBy=&quot;users&quot;)
         */
        private $package;
    
    }

    class Package
    {
    
        /**
         * @ORM\Id
         * @ORM\Column(type=&quot;integer&quot;)
         * @ORM\GeneratedValue(strategy=&quot;AUTO&quot;)
         */
        private $id;
    
        /**
         * @ORM\OneToMany(targetEntity=&quot;User&quot;, mappedBy=&quot;package&quot;)
         */
        private $users;
    
    }

Doctrine 2 can&#39;t use nullable=false in manyToOne relation?

I would like to know how I can display the location of Program Files (x86) in Command Prompt. I&#39;m using Windows 7 64bit.

I&#39;ve tried: 

 `echo %programfiles(x86)%` and `echo %programfiles%`.

Both of these output `C:\Program Files`

When I manually checked the registry,  
*HKLM/Software/microsoft/windows/currentversion*,  
the `programfilesdir` points to `C:\Program Files` and 

*HKLM/Software/WOW64/Microsoft/windows/currentversion*,  
the `programfilesdir` points to `C:\Program Files (x86)`.

But, why am I always seeing `C:\Program Files` displayed?

how to get program files x86 env variable?

OMG, what I&#39;ve done? 

Couple of days ago, I tried using macport to install something, because I&#39;m using Xcode 4.3 and the command-line tool hadn&#39;t been installed by the time, macport wouldn&#39;t work. So I followed some guide to get command-line tool installed, then I used following command:

    sudo xcode-select -switch /Applications/Xcode.app/

which I think screwed everything except macport: now, in Xcode, even a simple single-view iOS project won&#39;t be compiled, it says &quot;UIKit/UIKit.h not found&quot;.

Does anyone know how to correct this? I don&#39;t want to re-install the gigantic Xcode again, gotta do some iOS project tonight, help!

Xcode stops working after set &quot;xcode-select -switch&quot;

OMG, what I've done?
Couple of days ago, I tried using macport to install something, because I'm using Xcode 4.3 and the command-line tool hadn't been installed by the time, macport wouldn't work. So I followed some guide to get command-line tool installed, then I used following command:
<pre><code class="hljs language-csharp">sudo xcode-select -switch /Applications/Xcode.app/
</code></pre>
which I think screwed everything except macport: now, in Xcode, even a simple single-view iOS project won't be compiled, it says "UIKit/UIKit.h not found".
Does anyone know how to correct this? I don't want to re-install the gigantic Xcode again, gotta do some iOS project tonight, help!

Among some other ways, there are these two ways to get queues in `GCD`:

    dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    
    dispatch_get_main_queue();

If I&#39;m not completely wrong, the &quot;main queue&quot; is executing on the main thread and is good for &quot;callback&quot; blocks which execute UI work.

Does this mean a &quot;global queue&quot; is one that runs on a background thread?

What&#39;s the difference between the &quot;global queue&quot; and the &quot;main queue&quot; in GCD?

I&#39;m fairly new to iOS development.

I want to add a footer to the table view in a `UITableViewController`. I&#39;ve made the view I want to use as the footer graphically in Storyboard, however I can&#39;t work out how to hook it up as the footer to my table view.

I can add a footer programmatically in `UITableViewController`&#39;s `viewDidLoad` method by assigning `self.tableView.tableFooterView`. But I&#39;ve created my footer view in Storyboard, what is the *best practice* way of adding it as the footer to my table view?

How to add a footer to a UITableView in Storyboard

Apple presented new iPad that support retina graphics.

I saw [this link retina graphic in apple apps](http://9to5mac.com/2011/06/14/ios-5-sdk-includes-retina-display-graphics-for-next-generation-ipad/). As you can see apple just use &quot;@2x&quot; suffix for retina iPad display.

I have an universal app. So how to support retina in new iPad *and* iPhone? Will iPad retina use suffix &quot;@2x&quot; similar to iPad?

How to support both iPad and iPhone retina graphics in universal apps

I&#39;m using custom `UITableViewCell`s inside my `UITableView`. Each of these `UITableViewCell`s is pretty high and contains a `UITextField` at the top.

When a user taps the `UITextField` in order to edit it, a keyboard appears and the `UITableView` scrolls automatically so that the cell is at the top of the screen. 

The problem is that this scrolls the `UITableView` to the bottom of the `UITableViewCell`, not the top. When the `UITableViewCell` is high and edited the `UITextField` is at the top so you can&#39;t see the `UITextField`. I know how to scroll the `UITableView` programmatically, but I just don&#39;t know how to disable this automatic scrolling so that I can scroll the `UITableView` on my own. How can I do this?


Disabling automatic scrolling of UITableView when editing UITextField inside UITableViewCell

I would like to use regular expression to find every instances of a regular expression pattern I.e. `&amp;*;` in my string and remove that from  so the return value is the original string without any of the matches. Also would like to use the same function to match multiple spaces between words and have a single space instead. Could not find such a function. 

Sample input string 

    NSString *str = @&quot;123 &amp;1245; Ross Test  12&quot;;

Return value should be 

    123 Ross Test 12

If anything matching this pattern `&quot;&amp;*` or multiple  white spaces and replaces it with `@&quot;&quot;;`

Use regular expression to find/replace substring in NSString

I still have Snow Leopard. I have Xcode 4.2 for iOS development. This morning I upgraded my iPhone and iPad to iOS 5.1. 

But Xcode 4.2 is not detecting my device for testing. I could not find the iOS 5.1 SDK image on Apple&#39;s developer site, for Xcode 4.2.

I don&#39;t want to do upgrade to Lion to get XCode 4.3 at this time.

Will I able to use Xcode 4.2 (on Snow Leopard) for iOS development now?

Is it possible to get the iOS 5.1 SDK for Xcode 4.2 on Snow Leopard?

I just upgraded XCode to 4.3.1.
I&#39;m using a script to build (and then deploy through Testflight) my app.
But I now receive this error:

&gt; Error: No developer directory found at /Developer. Run /usr/bin/xcode-select to update the developer directory path.

I&#39;ve no /Developer dir in my machine: how can I fix it?

How can I resolve &quot;Error: No developer directory found at /Developer&quot;?

I have installed xcode 4.3.1 on my machine running Lion. 

I can&#39;t find the Network Link Conditioner tool anywhere.

I have checked the utilities folder, also the `xcode/contents/developer/*` directories.. no such luck.

Do I need to install specific components or has this tool been removed or renamed recently?

Installing Apple&#39;s Network Link Conditioner Tool

I want git to ignore my `UserInterfaceState.xcuserstate` file in my XCode4 project, but where should I put the `.gitignore` file?, is it inside the `.git` folder? or out? The `.git` is in same folder with the `ProjectName.xcodeproj` file

.gitignore file, where should I put it in my xcode project?

I would like to remove from Mac OS-X taskbar (Dock) the XCode&#39;s recent project menu items.  
Everywhere I am searching it says the `File-&gt;Open Recent-&gt;Clear Menu` it will clear, but not.  
It doesn&#39;t clear from Dock, it clears from inside the `XCode` Recent menu.  
I believe I should dig somewhere is OS filesystem, but I don&#39;t know where.

It was an `XCode 4.2` intalled, I did a complete uninstall and installed version 4.3.  
But I couldn&#39;t clear the Dock&#39;s projects menu at version 4.3 either!

 

remove xcode recent projects from dock menu

When I try to run bundle (bundle install), I all the time get


    Installing pg (0.13.2) with native extensions 
    Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
    
            /Users/ryan/.rvm/rubies/ruby-1.9.2-p290/bin/ruby extconf.rb 
    checking for pg_config... no
    No pg_config... trying anyway. If building fails, please try again with
     --with-pg-config=/path/to/pg_config
    checking for libpq-fe.h... no
    Can&#39;t find the &#39;libpq-fe.h header
    *** extconf.rb failed ***
    Could not create Makefile due to some reason, probably lack of
    necessary libraries and/or headers.  Check the mkmf.log file for more
    details.  You may need configuration options.
    
    Provided configuration options:
    	--with-opt-dir
    	--without-opt-dir
    	--with-opt-include
    	--without-opt-include=${opt-dir}/include
    	--with-opt-lib
    	--without-opt-lib=${opt-dir}/lib
    	--with-make-prog
    	--without-make-prog
    	--srcdir=.
    	--curdir
    	--ruby=/Users/ryan/.rvm/rubies/ruby-1.9.2-p290/bin/ruby
    	--with-pg
    	--without-pg
    	--with-pg-dir
    	--without-pg-dir
    	--with-pg-include
    	--without-pg-include=${pg-dir}/include
    	--with-pg-lib
    	--without-pg-lib=${pg-dir}/lib
    	--with-pg-config
    	--without-pg-config
    	--with-pg_config
    	--without-pg_config
    
    
    Gem files will remain installed in /Users/ryan/.rvm/gems/ruby-1.9.2-p290/gems/pg-0.13.2 for inspection.
    Results logged to /Users/ryan/.rvm/gems/ruby-1.9.2-p290/gems/pg-0.13.2/ext/gem_make.out
    An error occured while installing pg (0.13.2), and Bundler cannot continue.
    Make sure that `gem install pg -v &#39;0.13.2&#39;` succeeds before bundling.

I use Mac OS X 10.6, the version of installed PostgreSQL is 9.1. I found the problem is in the **libpq-dev**, how could I install/fix that?

Rails 3 - can&#39;t install pg gem

following the suggestion in this Archlinux wiki, in the [page about tmux](https://wiki.archlinux.org/index.php/Tmux) I remapped the command key prefix to `C-a`, to mimic GNU screen and to have something easier on the keyboard than `C-b`. So my .tmux.conf became this:

    set -g default-terminal &quot;screen-256color&quot;
    unbind C-b
    set -g prefix C-a
    set-window-option -g mode-keys vi
    bind h select-pane -L
    bind j select-pane -D
    bind k select-pane -U
    bind l select-pane -R

However, while in screen it was possible to use `C-a a` to jump to the beginning of line, this does not work any more in tmux. As a sidenote, I&#39;m using iTerm2 without the tmux integration.

Does anybody know how to solve this?

Thanks!

Howto go to beginning of line in tmux after remapping prefix to CTRL+A?

I would like install R on my laptop Mac OS X version 10.7.3

I downloaded the last version and I double click on it and it was installed, when i start up I get the following error, I searched in internet but I could not solve the problem, any help would be appreciated 

the errors are 
&gt;During startup - Warning messages:  
1: Setting LC_CTYPE failed, using &quot;C&quot;   
2: Setting LC_COLLATE failed, using &quot;C&quot;   
3: Setting LC_TIME failed, using &quot;C&quot;   
4: Setting LC_MESSAGES failed, using &quot;C&quot;   
5: Setting LC_PAPER failed, using &quot;C&quot;   
[R.app GUI 1.50 (6126) x86_64-apple-darwin9.8.0]  

&gt;WARNING: You&#39;re using a non-UTF8 locale, therefore only ASCII characters will work.
Please read R for Mac OS X FAQ (see Help) section 9 and adjust your system preferences accordingly.
[History restored from /Users/nemo/.Rapp.history]

Content Type	Original Author	Original Content on Stackoverflow
Question	Chris Chen	View Question on Stackoverflow
Solution 1 - Ios	Jim	View Answer on Stackoverflow

Xcode stops working after set "xcode-select -switch"

Ios Problem Overview

Ios Solutions

Solution 1 - Ios

how to get program files x86 env variable?

Doctrine 2 can't use nullable=false in manyToOne relation?

Attributions