Json

- human readable/editable
- can be parsed without knowing schema in advance
- excellent browser support
- less verbose than XML

XML

- human readable/editable
- can be parsed without knowing schema in advance
- standard for SOAP etc
- good tooling support (xsd, xslt, sax, dom, etc)
- pretty verbose

Protobuf

- very dense data (small output)
- hard to robustly decode without knowing the schema (data format is internally ambiguous, and needs schema to clarify)
- very fast processing
- not intended for human eyes (dense binary)

All have good support on most platforms.

Personally, I rarely use XML these days. If the consumer is a browser or a public API I tend to use json. For internal APIs I tend to use protobuf for performance. Offering both on public API (either via headers, or separate endpoints) works well too.

I have tried ([JSFiddle][1]):

&lt;!-- begin snippet: js hide: false console: true babel: false --&gt;

&lt;!-- language: lang-html --&gt;

    &lt;input type=&quot;date&quot; value=&quot;2012-3-23&quot;&gt;

&lt;!-- end snippet --&gt;

but it doesn&#39;t work, how can I set the default value?


  [1]: http://jsfiddle.net/VD2QH/2/

How to set default value to the input[type=&quot;date&quot;]

I have created an RMarkdown file in RStudio and managed to knit it with knitr into an HTML and .md file.  Next, I used pandoc to convert the .md file into a PDF file (I get an error if I try and convert from the .html file).  However, the PDF that is produced have massive margins (like this [http://johnmacfarlane.net/pandoc/demo/example13.pdf][1]).  How can I get pandoc to produce something with smaller margins?  I have looked through the pandoc user guide, but haven&#39;t found anything useful.


  [1]: http://johnmacfarlane.net/pandoc/demo/example13.pdf

Set margin size when converting from Markdown to PDF with pandoc

I would like to know the merits &amp; de-merits of

- Google Protocol Buffers
- JSON
- XML

I want to implement one common framework for two application, one in Perl and second in Java. So, would like to create common service which can be used by both technology i.e. Perl &amp; Java.

Both are web-applications.

Please share me your valuable thoughts &amp; suggestion on this. I have seen many links on google but all have mixed opinions.

google protocol buffers vs json vs XML

I would like to know the merits &#x26; de-merits of
<ul>
<li>Google Protocol Buffers</li>
<li>JSON</li>
<li>XML</li>
</ul>
I want to implement one common framework for two application, one in Perl and second in Java. So, would like to create common service which can be used by both technology i.e. Perl &#x26; Java.
Both are web-applications.
Please share me your valuable thoughts &#x26; suggestion on this. I have seen many links on google but all have mixed opinions.

So, in my strings.xml I have a very long text which I want to format somehow.
How can I put a tab before the first sentence of the text? Also, what is the code for new line? Thanks

How to make a new line or tab in &lt;string&gt; XML (eclipse/android)?

I have following XML.

    &lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
    &lt;Employees&gt;
    	&lt;Employee id=&quot;3&quot;&gt;
    		&lt;age&gt;40&lt;/age&gt;
    		&lt;name&gt;Tom&lt;/name&gt;
    		&lt;gender&gt;Male&lt;/gender&gt;
    		&lt;role&gt;Manager&lt;/role&gt;
    	&lt;/Employee&gt;
    	&lt;Employee id=&quot;4&quot;&gt;
    		&lt;age&gt;25&lt;/age&gt;
    		&lt;name&gt;Meghna&lt;/name&gt;
    		&lt;gender&gt;Female&lt;/gender&gt;
    		&lt;role&gt;Manager&lt;/role&gt;
    	&lt;/Employee&gt;
    &lt;/Employees&gt;

I want to select Employee element with id=&quot;4&quot;.

I am using below XPath expression which is not returning anything.

    //Employee/[@id=&#39;4&#39;]/text()

I checked it at http://chris.photobooks.com/xml/default.htm and it says invalid xpath, not sure where is the issue.

XPath to select Element by attribute value

I used this Xpath expression `&quot;//span[@class=&#39;Big&#39;]&quot;` and got all elements in that page that are under `&lt;span&gt;` tag and `class=&#39;Big&#39;`.

My question is what if I want just the first occurrence on the page, not all occurrences, what would be the correct `Xpath` expression?

Thanks,
Narin

What is the XPath expression to find only the first occurrence?

Is it possible to create an XML file with some data in JavaScript? I have the data stored in variables. 

I&#39;ve googled around a bit and it doesn&#39;t seem like it&#39;s talked about much. I thought I could use `XMLWriter` such as this:

    var XML = new XMLWriter();
    XML.BeginNode (&quot;testing&quot;);
    XML.Node(&quot;testingOne&quot;);
    XML.Node(&quot;TestingTwo&quot;);
    XML.Node(&quot;TestingThree&quot;);
    XML.EndNode();

as stated in this tutorial: [EHow Tutorial][1]

However, when I execute this code, I get the following error:

&gt; ReferenceError: XMLWriter is not defined

How can I solve this error?

  [1]: http://www.ehow.com/how_5956065_create-xml-file-javascript.html

Create XML in JavaScript

Jackson has annotations for ignoring unknown properties within a class using:

    @JsonIgnoreProperties(ignoreUnknown = true) 

It allows you to ignore a specific property using this annotation:

    @JsonIgnore

If you&#39;d like to globally set it you can modify the object mapper:

    // jackson 1.9 and before
    objectMapper.configure(DeserializationConfig.Feature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    // or jackson 2.0
    objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

How do you set this globally using spring so it can be `@Autowired` at server start up without writing additional classes?

How do you globally set Jackson to ignore unknown properties within Spring?

jQuery Templates have been deprecated for some time now.

I have some data in the form of a JavaScript object that I want to format as HTML and append to the DOM. What&#39;s the best way of doing that these days?

1. Should I build up an HTML string?
2. Should I create elements via jQuery such as `$(&#39;&lt;li&gt;&#39;,{id:&#39;my-&#39;+Id}).append($(&#39;&lt;span&gt;&#39;).text(myText))` ?
3. Is there a replacement or mature substitute for jQuery templates?

Recommended jQuery templates for 2012?

How to convert generic list to json in Java.I have class like this..

    public class Output
    {
        public int Keyname { get; set; }
        public Object  outputvalue{ get; set; }  //outvalue may be even a object collection
    }

    List&lt;Output&gt; outputList = new List&lt;Output&gt;();

I want to convert outputList  into json in Java.After converting i will send it to client.


How to convert List to Json in Java

I need to populate a json file, now I have something like this:

    {&quot;element&quot;:{&quot;id&quot;:10,&quot;quantity&quot;:1}}

And I need to add another &quot;element&quot;. My first step is putting that json in a Object type using `cart = JSON.parse`, now I need to add the new element.
I supposed I must use `cart.push` to add another element, I tried this:

    var element = {};
    element.push({ id: id, quantity: quantity });
    cart.push(element);

But I got error &quot;Object has no method push&quot; when I try to do `element.push`, and I think I&#39;m doing something VERY wrong because I&#39;m not telling the &quot;element&quot; anywhere.

How can I do that?

**Edit:** sorry to all I had a LOT of confusion in my head.

I thought I can get only object type when taking data from `JSON.parse`, but I get what I put in the JSON in the first place.

Putting array instead of object solved my problem, I used lots of suggestions got here too, thank you all!

Adding elements to object

In my Ruby on Rails application I tried to upload an image through the POSTMAN [REST][1] client in [Base64][2] format. When I POST the image I am getting a *406 Not Acceptable Response*. When I checked my database, the image was there and was successfully saved.

What is the reason for this error, is there anything I need to specify in my header?

My request:

 URL ---    `http://localhost:3000/exercises.json`

Header:

    Content-Type  -  application/json

Raw data:

    {
        &quot;exercise&quot;: {
            &quot;subbodypart_ids&quot;: [
                &quot;1&quot;,
                &quot;2&quot;
            ],
            &quot;name&quot;: &quot;Exercise14&quot;
        },
        &quot;image_file_name&quot;: &quot;Pressurebar Above.jpg&quot;,
        &quot;image&quot;:&quot;******base64 Format*******&quot;
    }

  [1]: http://en.wikipedia.org/wiki/Representational_State_Transfer
  [2]: http://en.wikipedia.org/wiki/Base64


What is &quot;406-Not Acceptable Response&quot; in HTTP?

What actually the difference between this?

This works fine:

    var obj1 = jQuery.parseJSON(&#39;{&quot;orderedList&quot;: &quot;true&quot;}&#39;);
    document.write(&quot;obj1 &quot;+ obj1.orderedList );
    
but the following does not work:

    var obj2 = jQuery.parseJSON(&quot;{&#39;orderedList&#39;: &#39;true&#39;}&quot;);
    document.write(&quot;obj2 &quot;+ obj2.orderedList );

Why is that?

jQuery.parseJSON single quote vs double quote

I would like to include a protocol definition file in another protocol file. For example:

    // base.proto:
    message P_EndPoint {
      required int32 id = 1;
      required string host = 2;
      required int32 port = 3;
    }
Then in another file:

    communication.proto:
    // somehow include `base.proto&#39;
    // ...
    message P_CommunicationProtocol {
      required CP_MessageType type = 1;
      optional int32 id = 2;
      optional P_EndPoint identity = 3;
      repeated P_EndPoint others = 4;
    }
    // ...

 (Note: developers.google.com is not available in my locale)

Splitting protocol buffer definitions into multiple .proto files

I&#39;m using protocol-buffers python lib to send data,but it&#39;s have some problems, so

    Traceback (most recent call last):
      File &quot;test_message.py&quot;, line 17, in &lt;module&gt;
        ptask.task = task
      File &quot;build\bdist.win32\egg\google\protobuf\internal\python_message.py&quot;, line
    513, in setter
    AttributeError: Assignment not allowed to composite field &quot;_task&quot; in protocol message object.

the src as follows:

proto file:

    message task {
        required int32 id = 1;
        required string msg = 2;
    }

    message task_info {
        required task task = 1;
    }

python code:

    task = yacc.task()
    task.id = 1000
    task.msg = u&quot;test&quot;
    ptask = yacc.task_info() 
    ptask.task = task # this line happen the runtime error 

AttributeError: Assignment not allowed to composite field &quot;task&quot; in protocol message object

Google Protocol Buffers can not only be serialized in binary format, also be [serialized as text](https://developers.google.com/protocol-buffers/docs/reference/cpp/google.protobuf.text_format), known as textproto. However I can&#39;t easily find examples of such text; what would it look like?

Expected answer: an example covering all features allowed by the protobuf IDL/proto file including a sample protobuf packet in textual form.

What does the protobuf text format look like?

I have an object that I de-serialize using `protobuf` in Python. When I print the object it looks like a python object, however when I try to convert it to `json` I have all sorts of problems.

For example, if I use `json.dumps()` I get that the object (the generated code from protoc) does not contain a _ _dict_ _ error.

If I use jsonpickle I get `UnicodeDecodeError: &#39;utf8&#39; codec can&#39;t decode byte 0x9d in position 97: invalid start byte`. 


Test code below is using `jsonpickle` with the error shown above. 

    if len(sys.argv) &lt; 2:
        print (&quot;Error: missing ser file&quot;)
        sys.exit()
    else :
        fileLocation = sys.argv[1]
        
    org = BuildOrgObject(fileLocation) 

    org = org.Deserialize()
    
           
    #print (org)
    jsonObj = jsonpickle.encode(org)
    print (jsonObj)

Protobuf to json in python

I tried importing a proto file named test1.proto to another proto file named test2.proto using the import statement

    import &quot;com/test/test1.proto&quot;;

But i get the following error 

    com/test/test1.proto: File not found.
    test2.proto: Import &quot;com/test/test1.proto&quot; was not found or had errors.

I tried in many ways to find the cause of the import error but couldn&#39;t. So could someone please tell me the correct way of doing proto file imports in case there is something wrong with the above statement??

Content Type	Original Author	Original Content on Stackoverflow
Question	Manoj Kathiriya	View Question on Stackoverflow
Solution 1 - Xml	Marc Gravell	View Answer on Stackoverflow

google protocol buffers vs json vs XML

Xml Problem Overview

Xml Solutions

Solution 1 - Xml

Set margin size when converting from Markdown to PDF with pandoc

How to set default value to the input[type="date"]

Attributions