Right click and choose `Reveal in Project Navigator` or press &lt;kbd&gt;⇧&lt;/kbd&gt; + &lt;kbd&gt;⌘&lt;/kbd&gt; + &lt;kbd&gt;J&lt;/kbd&gt;

See [Xcode 4 Keyboard Shortcuts][1] for more, or better yet, use [KeyCue][2].


  [1]: http://cocoasamurai.blogspot.com/2011/03/xcode-4-keyboard-shortcuts-now.html
  [2]: http://www.ergonis.com/products/keycue/

I had been planning on using simpleXML for my serialization needs, but figured I would try JSON out, to learn something new.  

This is the code I am using to try and serialize an ArrayList of test POJO&#39;s using Gson 1.7.1. 

Note: I removed the Reader/Writers for a String &quot;s&quot; to simplify the code.

    package test;
    
    import java.io.IOException;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.List;
    
    import com.google.gson.Gson;
    
    public class TestGsonSerialDeserialList {
    	public static void main(String[] args) throws IOException{
    		Gson gson = new Gson();
    		
    		//Make Serial 
    		String s;
    		List&lt;TestObject&gt; list = Collections.synchronizedList(new ArrayList&lt;TestObject&gt;() );
    		list.add(new TestObject());
    		list.add(new TestObject());
    		
    	    s = gson.toJson(list, ArrayList.class);
    	    System.out.println(s);
    	    
    	    //Eat Serial
    	    List&lt;TestObject&gt; list2 = Collections.synchronizedList(gson.fromJson(s, ArrayList.class) );
    	    System.out.println(list2.get(0) );
    	    System.out.println(list2.get(1) );
    	}
    }

Here is the output I get:

    [{&quot;objectID&quot;:1,&quot;i1&quot;:12345,&quot;name&quot;:&quot;abcdefg&quot;,&quot;s&quot;:[&quot;a&quot;,&quot;b&quot;,&quot;c&quot;]},{&quot;objectID&quot;:2,&quot;i1&quot;:12345,&quot;name&quot;:&quot;abcdefg&quot;,&quot;s&quot;:[&quot;a&quot;,&quot;b&quot;,&quot;c&quot;]}]
    java.lang.Object@5c74c3aa
    java.lang.Object@75d9fd51

To my newbie eyes this looks correct. Only, the DeSerialized list of objects contains basic Objects, rather then the TestObject&#39;s I serialized. Can anyone please explain to me what, if anything, I can do to make this work?


**EDIT:**

Corrected to test: Thanks to ColinD


    package test;
    
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.io.OutputStreamWriter;
    import java.io.Reader;
    import java.io.Writer;
    import java.lang.reflect.Type;
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.List;
    
    import com.google.gson.Gson;
    import com.google.gson.reflect.TypeToken;
    
    public class TestGsonSerialDeserialList {
    	public static void main(String[] args) throws IOException{
    		System.out.println(&quot;--- Serialize / Deserialize Started ---&quot;);
    		String fileName = &quot;json\\testList.json&quot;;
    		
    		Gson gson = new Gson();
    		Type listOfTestObject = new TypeToken&lt;List&lt;TestObject&gt;&gt;(){}.getType();
    		
    		//Make Serial 
    		Writer osWriter = new OutputStreamWriter( new FileOutputStream(fileName));
    		List&lt;TestObject&gt; list = Collections.synchronizedList(new ArrayList&lt;TestObject&gt;() );
    		list.add(new TestObject());
    		list.add(new TestObject());
    		list.add(new TestObject());
    		list.add(new TestObject());
    	    gson.toJson(list, osWriter);
    	    osWriter.close();
    	    
    	    
    	    //Eat Serial
    	    Reader isReader = new InputStreamReader( new FileInputStream((fileName) ) );
    	    List&lt;TestObject&gt; list2 = Collections.synchronizedList(
    	    	(List&lt;TestObject&gt;)gson.fromJson(isReader, listOfTestObject) 
    	    );
    	    isReader.close();
    	    System.out.println(list2.get(0) );
    	    System.out.println(list2.get(1) );
    	    System.out.println(list2.get(2) );
    	    System.out.println(list2.get(3) );
    	    System.out.println(&quot;--- Serialize / Deserialize Ended ---&quot;);
    	}
    }

output:

    --- Serialize / Deserialize Started ---
    ID#: 1, i1: 12345, name: abcdefg, s[]: [Ljava.lang.String;@95c083
    ID#: 2, i1: 12345, name: abcdefg, s[]: [Ljava.lang.String;@6791d8c1
    ID#: 3, i1: 12345, name: abcdefg, s[]: [Ljava.lang.String;@182d9c06
    ID#: 4, i1: 12345, name: abcdefg, s[]: [Ljava.lang.String;@5a5e5a50
    --- Serialize / Deserialize Ended ---


**EDIT2:**

I honestly don&#39;t know why, but when I replaced the simple String[] embedded in my TestObject with an ArrayList, it started serializing correctly.

    --- Serialize / Deserialize Started ---
    ID#: 1, i1: 12345, name: abcdefg, s[]: [a, b, c]
    ID#: 2, i1: 12345, name: abcdefg, s[]: [a, b, c]
    ID#: 3, i1: 12345, name: abcdefg, s[]: [a, b, c]
    ID#: 4, i1: 12345, name: abcdefg, s[]: [a, b, c]
    --- Serialize / Deserialize Ended ---


Trouble with Gson serializing an ArrayList of POJO&#39;s

Using jQuery, how can I clear the input text after I made a click? By default, the value remains in the input field.

For example, I have an input text and the value is `TEXT`. When I perform a click, I want the input field to become empty.


How can I clear the input text after clicking

Is there a way to easily get the current file in the Editor pane selected in the Project Navigator without the need to expand all folders (if the file is buried deep down somewhere)?

I know you can see the location in your project using the &quot;bread crumb&quot; on top op the Editor pane, but I like a functionality similar to the one in Visual Studio...

Is there a keyboard shortcut for locating the current file in Project Navigator?

<p>Is there a way to easily get the current file in the Editor pane selected in the Project Navigator without the need to expand all folders (if the file is buried deep down somewhere)?</p>
<p>I know you can see the location in your project using the "bread crumb" on top op the Editor pane, but I like a functionality similar to the one in Visual Studio...</p>


In previous versions of `Xcode` it was possible to create a key binding to delete the current line. There were different solutions and they are described for example here:

https://stackoverflow.com/questions/476953/xcode-delete-line-hot-key

https://stackoverflow.com/questions/551383/xcode-duplicate-delete-line

&lt;http://bigdiver.wordpress.com/2009/09/11/configure-homeend-key-bidings-on-mac-os-x/&gt;

&lt;http://www.betadesigns.co.uk/Blog/2010/02/03/custom-xcode-shortcuts/&gt;

All solutions include modifying one of these files:

&gt; ~/Library/Application Support/Xcode/Key Bindings/*.pbxkeys  
&gt; ~/Library/KeyBindings/DefaultKeyBinding.dict  
&gt; ~/Library/KeyBindings/PBKeyBinding.dict

A good resource for the existing shortcuts in `Xcode 4` is http://cocoasamurai.blogspot.com/2011/03/xcode-4-keyboard-shortcuts-now.html . There are many listed regarding deletion, but none for &quot;delete line&quot;.


BUT, these solutions do **NOT** work since `Xcode 4`. 

**Update**:
Issue is still the same as of `Xcode 5.1.1`

**Update**:
Issue is still the same as of `Xcode 6.1 GM Seed 2`

**Update**:
Still applies to Xcode Version 7.3 (7D175) as of 26th April 2016

**Update**:
Six years later Xcode 8.3 has a built-in solution. See answer below.

How do I create a Delete-Line Keyboard shortcut in Xcode 8? The Xcode 3 solutions do not work anymore

When I navigate to one of my xib files, Xcode marks the file as touched. Undo and revert have no effect.  Saving seems to do no harm, but the glitch causes me frequent additional git work.  

Has anyone else seen this or have an idea about something in my MainWindow.xib that would cause it?  

Edit in 2019 - still happening!

How to avoid Xcode gratuitous edits to storyboard files?

In Xcode 3, the line number of the current cursor location was displayed.  I don&#39;t see this in Xcode 4. Is there a setting that will turn it on? Or a keypress that will give it to me?

Where do I find the line number in the Xcode editor?

There is a &quot;run script only when installing&quot; option in Xcode Run script Build Phase, I am not able to find documentation on this.  What does it do?

Xcode Run script Build Phase &quot;run script only when installing&quot; option

Before Xcode 4 the build used to be created in the root folder of my project.
I can no longer find it.

Where can i find the build folder?

Where is Xcode&#39;s build folder?

The Git integration in Xcode 4 is very welcome however it seems to be a bit flaky when it comes to dealing with remote repositories.
For clarity I&#39;m using OS X version 10.6.7 and Xcode 4.0.2 (4A2002a). 

If I create a new Xcode 4 Project and accept the option to create a local Git repository, all is well. I can commit locally and that&#39;s great.

When I want to push the new project to GitHub I want to add a remote repository and push my local changes up to GitHub. I can add a GitHub repository to Xcode 4 as a new Repository in the Organizer window but there&#39;s no method of setting it as a remote repository for my existing project. 

So I switch to using git commands in Terminal.

    git remote add origin https://&lt;username&gt;@github.com/&lt;organization&gt;/&lt;repository&gt;.git

If I then go back to Xcode 4 and try to use 
&gt; File -&gt; Source Control -&gt; Push...  

then the **Choose the repository to which to push changes.** dialog appears listing the _origin_ remote repository. There&#39;s a yellow indicator saying that Authentication is required, which is fine as I&#39;ve not been able to enter my credentials yet for HTTPS. 
However when I click &#39;Push&#39;  and it tries to push the changes it says &quot;The operation could not be performed because access to the repository &#39;origin&#39; is denied.&quot;

A dialog prompting me for my username and password then appears with my &lt;username&gt; pre-filled out so it must be reading this correctly from the local repository&#39;s config.

When I enter my password Xcode 4 then crashes with the following error

    ASSERTION FAILURE in /SourceCache/IDEKit/IDEKit-303/Framework/Classes/SourceControl/IDESourceControlOperationInfo.m:59
    Details:  Message sent to invalidated object: &lt;IDESourceControlPushOperationInfo, 0x200bd2a80&gt;. Backtrace for invalidation:
     (null)
    Object:   &lt;IDESourceControlPushOperationInfo: 0x200bd2a80&gt;
    Method:   -invalidate
    Thread:   &lt;NSThread: 0x200020700&gt;{name = (null), num = 1}
    Hints:   None

If I restart Xcode an _origin_ repository has been added to the Repositories browser in Organizer and I can see the master branch on GitHub so I know the credentials are right without me changing anything.

Has anyone found a reliable way of using Xcode 4 with GitHub starting with a local project first?

If I clone an existing GitHub repository with an Xcode project in it, open it with Xcode 4 then even though the first Push seems to fail, the 2nd push did then work. So maybe starting from absolute scratch with Xcode 4 creating the repository for me isn&#39;t the best pattern (until they improve the Git tooling in a later version of Xcode 4).

EDIT WITH FURTHER DETAILS OF ONE WORKAROUND
-------------------------------------------
This example only really applies to the first project you&#39;re adding to a GitHub repository. As such I think you&#39;re better off with the following steps, bearing in mind there still seem to be some Xcode &#39;gotchas&#39; in this solution.

 1. List item
 1. &#39;Connect to a repository&#39; from Welcome to Xcode dialog.
 1. Use GitHub SSH URL for Location
 1. Give it a name (_RepositoryName_)and Clone to a directory
 1. 1st attempt appears to fail even though contents are downloaded
 1. Try Again and it works.
 1. There is now a new Repository defined in the Organizer window with its origin set to the GitHub remote SSH URL.
 1. Create a New Project within the directory you just cloned into but DO NOT tick the &#39;Create local git repository for this project&#39; option.
 1. Do initial commit to local Git repository.
 1. Try Source Control -&gt; Push and Xcode 4 fails with &#39;The operation could not be performed because access to the repository _RepositoryName_ was denied. Check username and password&#39;
 1. Try Source Control -&gt; Push and Xcode 4 pops up the remote Repository dialog again but this time has detected a remote Repository called _origin_. Next to it there&#39;s a yellow ball and &#39;Authentication required&#39;.
 1. Clicking &#39;Push&#39; again caused the remote Push to work.

One thing I&#39;ve spotted and not managed to work out yet is that the response messages back from GitHub with the checkin hash value and any messages seem to get reported in Xcode Log navigator as Push failures, even though the Push is successful as far as GitHub is concerned.

Anyone else have a better solution?

In Xcode 4 how do I add a remote GitHub repository to an existing local project?

CodeSign error: Certificate identity &#39;iPhone Developer: XXXX (12345678)&#39; appears more than once in the keychain. The codesign tool requires there only be one.

So I go to my keychain and delete it. But I get this error every time I restart Xcode 4 and some app is adding the expired old certificate back into keychain. Any ideas why and which app?

Codesign error: Certificate identity appearing twice

I&#39;m trying to switch branches in git but I&#39;m getting this error message:

    error: you need to resolve your current index first

I&#39;m using git under xcode4 

    git status
    # On branch DateCode
    # Unmerged paths:
    #   (use &quot;git reset HEAD &lt;file&gt;...&quot; to unstage)
    #   (use &quot;git add/rm &lt;file&gt;...&quot; as appropriate to mark resolution)
    #
    #	both modified:      Whereami.xcodeproj/project.xcworkspace/xcuserdatauser.xcuserdatad/UserInterfaceState.xcuserstate
    #
    no changes added to commit (use &quot;git add&quot; and/or &quot;git commit -a&quot;)
    Frappuccinos-MacBook-Pro:whereami

Why can I not switch branches?

Am looking for how to set up file compare/diff in Xcode 4, but have run into brick wall. Anyone can tell me how to do it?

Content Type	Original Author	Original Content on Stackoverflow
Question	Niels R.	View Question on Stackoverflow
Solution 1 - Xcode	Jano	View Answer on Stackoverflow

Is there a keyboard shortcut for locating the current file in Project Navigator?

Xcode Problem Overview

Xcode Solutions

Solution 1 - Xcode

How can I clear the input text after clicking

Trouble with Gson serializing an ArrayList of POJO's

Attributions