Which of the following are not global methods and properties in E4X?

admin

November 13, 2012

Which of the following are not global methods and properties in E4X?

a. ignoreComments
b. ignoreWhiteSpace
c. setName()
d. setNamespace()
e. a and b
f. c and d

The global XML Object

E4X-capable JavaScript engines put a new property on the global object. The XML object has several properties that allow you to customize parsing and serialization of E4X. XML elements will remember the settings of the XML object from the time of their creation.

Extending `XML.prototype`

XML.prototype and XMLList.prototype (XMLList.prototype is actually just XML.prototype) cannot be extended in the same conventional way as other constructors such as Object. You can only define methods in XML.prototype and not fields. To add a method to XML.prototype, define XML.prototype.function::methodName or XML.prototype.function::[methodNameString]. The following example defines thefooCount() method, which returns the amount of <foo> elements in the XML:

XML.prototype.function::fooCount = function fooCount() {

return this..foo.length();

};

<foobar><foo/><foo/><foo/></foobar>.fooCount() // returns 3

`ignoreComments`

true by default. This property tells E4X to ignore comment nodes when serializing and filtering. This means that if ignoreComments is true, the list returned by.comments() will be empty. Observe:

var element = <foo>

<bar/>

</foo>;

element.comments().length(); // returns 0

element.toXMLString(); // returns <foo><bar/></foo>

XML.ignoreComments = false;

element = <foo>

<bar/>

</foo>;

element.comments().length(); // returns 1

element.toXMLString(); // returns <foo><bar/></foo>

`ignoreProcessingInstructions`

true by default. This property tells E4X to ignore processing instructions in XML when serializing and filtering. For example

var element = <foo>

<?process x="true"?>

<bar/>

<?process x="false"?>

</foo>;

element.toXMLString(); // returns <foo><bar/></foo>

XML.ignoreProcessingInstructions = false;

var element = <foo>

<?process x="true"?>

<bar/>

<?process x="false"?>

</foo>;

element.toXMLString(); // returns <foo><?process x="true"?><bar/><?process x="false"?></foo>

`ignoreWhitespace`

true by default. Ignores whitespace between nodes and leading and trailing whitespace in text nodes, which would otherwise be interpreted as text nodes or as part of those text nodes, respectively.

`prettyPrinting`

true by default. When true, toXMLString() includes newlines and indenting for the serialization of E4X objects.

`prettyIndent`

2 by default. The number of spaces to indent each level in the XML tree. Ignored if prettyPrinting is false.

Now you know what the answer is. Yes, the f is the correct answer. via

Use RegExp to help replace do replaceall function in javascript

admin

November 7, 2012

There is a function replace in javascript. However, sometime we not only want to replace the first string but all matched strings. Now we can use the Regex to do this.

Given that str=”Please visit Microsoft by Microsoft Internet Explorer.”

Let’s replace all “Microsoft” with “xtwe.com”, here is the entire syntax:

var str=”Please visit Microsoft by Microsoft Internet Explorer.”

str=str.replace(new RegExp(“Microsoft”, “gm”), “xtwe.com”);

alert(str);

</script>

Now you will get the replaced string like this:

Please visit xtwe.com by xtwe.com Internet Explorer.

gm means: global multiLine

RegExp, is short for regular expression.

A javascript Function to Set All Date Format

admin

November 2, 2012

I don’t know why javascript does not built-in this useful function. Here is a solution, hope it helps.

JavaScript Date Format:

Date.prototype.format = function (format) {
/*
* eg:format=”yyyy-MM-dd hh:mm:ss”;
*/
var o = {
“M+”: this.getMonth() + 1, //month
“d+”: this.getDate(), //day
“h+”: this.getHours(), //hour
“m+”: this.getMinutes(), //minute
“s+”: this.getSeconds(), //second
“q+”: Math.floor((this.getMonth() + 3) / 3), //quarter
“S”: this.getMilliseconds() //millisecond
}

if (/(y+)/.test(format)) {
format = format.replace(RegExp.$1, (this.getFullYear() + “”).substr(4 – RegExp.$1.length));
}

for (var k in o) {
if (new RegExp(“(” + k + “)”).test(format)) {
format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k] : (“00″ + o[k]).substr((“” + o[k]).length));
}
}
return format;
}

How to use this function:

var date=new Date();

date.format(‘MM/dd/yyyy’); ->02/11/2012

date.format(‘yyyy-mm-dd’); ->2012-11-02

and so on.

Please let me know if any questions.

Transforming in-Memory Objects into XML

admin

October 24, 2012

LINQ queries make it easy to transform data between in-memory data structures, SQL databases, ADO.NET Datasets and XML streams or documents. The following example transforms objects in an in-memory data structure into XML elements.

class XMLTransform
{
    static void Main()
    {            
        // Create the data source by using a collection initializer.
        List<Student> students = new List<Student>()
        {
            new Student {First="Svetlana", Last="Omelchenko", ID=111, Scores = new List<int>{97, 92, 81, 60}},
            new Student {First="Claire", Last="O’Donnell", ID=112, Scores = new List<int>{75, 84, 91, 39}},
            new Student {First="Sven", Last="Mortensen", ID=113, Scores = new List<int>{88, 94, 65, 91}},
        };

        // Create the query. 
        var studentsToXML = new XElement("Root",
            from student in students
            let x = String.Format("{0},{1},{2},{3}", student.Scores[0],
                    student.Scores[1], student.Scores[2], student.Scores[3])
            select new XElement("student",
                       new XElement("First", student.First),
                       new XElement("Last", student.Last),
                       new XElement("Scores", x)
                    ) // end "student"
                ); // end "Root" 

        // Execute the query.
        Console.WriteLine(studentsToXML);

        // Keep the console open in debug mode.
        Console.WriteLine("Press any key to exit.");
        Console.ReadKey();
    }
}

The code produces the following XML output:

< Root>
  <student>
    <First>Svetlana</First>
    <Last>Omelchenko</Last>
    <Scores>97,92,81,60</Scores>
  </student>
  <student>
    <First>Claire</First>
    <Last>O'Donnell</Last>
    <Scores>75,84,91,39</Scores>
  </student>
  <student>
    <First>Sven</First>
    <Last>Mortensen</Last>
    <Scores>88,94,65,91</Scores>
  </student>
</Root>

via

Show two values past the decimal, and not round up or down

admin

October 23, 2012

Just a single line of code to solve the problem

Show two values past the decimal, and not round up or down

Math.Floor(t * 100) / 100

Sorry, this method returns the largest integer less than or equal to the specified number. via

So, the real method is:

(((int)(t * 100)) * 1.0 / 100)

Please try it. Please let me know if any problems.

WCF Error(Solved):The specified named connection is either not found in the configuration, not intended to be used with the EntityClient provider, or not valid

admin

October 20, 2012

I got the answer from the stackoverflow.com, and below is the answer.

I suspect that your issue is coming from the fact that you have more than one project in your solution and the one that contains your entity framework stuff including edmx files is NOT the solutions’s startup project. In this case even if the connection string exists in the EF app.config project, still CLR cannot find it at runtime. For example if you have a web site and a EF project in your solution, you need to copy the connection string from the EF project’s app.config to your website’s web.config. Basically any connection string data should be exist in the config file of the project that the .Net threads initiated from by CLR (i.e. your startup project). If this is not your case, then just open your edmx file, right click on its surface, select properties and copy the connection string and paste it into your app.config Connection String section. This way you can make sure that you are having the correct one in your config.

Thanks for the author Morteza Manavi. via

WCF Error (Solved): Metadata publishing for this service is currently disabled.

admin

October 20, 2012

When the following WCF Error was occured,

Metadata publishing for this service is currently disabled.

Please try to change the web.config like this (see the Red code):

Find the node:

behavior -> serviceDebug update the includeExceptionDetailInFaults to “true”

<serviceDebug includeExceptionDetailInFaults=”true” />

Add a child node to the behavior node:

<serviceMetadata httpGetEnabled=”true” />

The full code of the node behavior is:

<behavior name=”WSSFService.ServiceImplementation.WSSFWCFService_Behavior”>

<serviceDebug includeExceptionDetailInFaults=”true” />

<serviceMetadata httpGetEnabled=”true” />

</behavior>

Hope it can help others as well.

A Simple Story To Understand WCF

admin

October 9, 2012

Found an extremely nice story to understand the need of WCF, so thought of sharing..

Long Long time a ago there lived a hard working and a nice architect. He used to work for a travel agent with his small and happy team software professionals. Travel agent had tie ups with many big flight carriers. The nice and hardworking architecture and his team developed a nice booking engine by which you can book tickets through any of the flight carriers. The Travel Agent Company was very happy with the architecture and his team member’s achievements. As time passed by the travel agent’s business grew in multiples.

Travel agent started his own franchise. Travel agent wanted to provide this booking engine service to his franchise. So one fine morning he called the hard working architecture. Architecture was very excited of the new work and started on it day and night.

He prepared a list of franchise and made personal visits to see what infrastructure they had. He saw all the franchise worked in Microsoft Windows platform. Booking engine was located in the main head office and all the franchise should communicate to this booking engine. After discussing with his team members he concluded that the best way to communicate is .NET remoting because the head office where the booking engine was hosted was also on windows platform and the other franchise where also on the same. He then worked day and night with his team members to implement .NET remoting to enable communication between the franchise and the booking engine hosted in the head office. After months he rolled out his project successfully. Travel Agent was very happy with his architecture and the team.

wcf4 tutorials A Simple Story to Understand WCF

Travel agent was now providing his booking service to his franchise in the most efficient manner. Time passed by and because of the good automated booking service more companies wanted to take the franchise from the travel agent.

But the big issue was many of the franchise did not have windows operating system. They worked on Linux and other Non-Microsoft operating systems. Due to this limitation travel agent was loosing lot of franchise business. So one fine day they again called the Architecture and said that the booking engine should also be available to Non-Microsoft platforms. Architecture again went in to action. He setup a high level team meeting and discussed the best solution on Non-Microsoft platforms. After long discussion’s they concluded Web services as the solution. His team again went in to action and implemented the solution.

So now his booking engine architecture was working with two technologies .NET remoting and Web services. He kept .NET remoting so that he can get speed and performance benefits from common windows platform and he also kept Web services so that he can operate seamlessly with Non-Microsoft platforms.

Travel agent was now at his peak of happiness as he had the world at his tips. Franchise now started making huge ticket bookings through the booking engine.

Booking engine had the capacity of serving 20 tickets / second but it had now to serve 50 tickets / second. End franchise client had to wait to get response and was not able to process the next ticket booking until the first one was served. Travel Agent started receiving huge complaints because of this synchronous processing. They again called the architecture and proposed the problem before him.

Now architecture was really at a fix as he did not wanted to touch the booking engine logic to increase performance. So he concluded to use MSMQ (Microsoft Message Queuing) service. He analyzed that the main problem was that the travel agent had to wait until his first ticket booking is not completed. So when the travel agent makes a booking it will come and fall in the queue and release the travel agent. Booking engine will always poll for this queue. When the booking engine finishes he will publish the booking results back to the queue. Travel agent client can then come at his leisure and see the results. Again he and his team mates implemented this solution.

Every one in the travel company was really happy and impressed by the architect and his team members.

wcf3 tutorials A Simple Story to Understand WCF

As time passed by the booking engine was serving huge ticket bookings.

Travel Agent then felt a huge necessity of a good security model with the booking engine. Again the architecture was called; he again had a kick of meeting and proposed WSE as the security solution. Implemented the same and everything was fine.

After some days travel agent wanted to start a scheme to book group family ticket bookings through the booking engine. Till now the travel agent was booking one ticket at a time. But soon he started getting lot of orders to book group family tickets. He wanted to incorporate the same in the booking engine with consistency. Consistency means if any of the ticket booking fails in the family booking all the tickets should be cancelled. In short either all the tickets in the family are booked or none of them. Looking at the need Architecture thought to use COM+ Services to manage transactions.

Architecture and his team were now feeling the pressure and heat of managing multiple technologies to achieve. The happy architecture now started becoming frustrated. His team members started slogging for night as they had to work on multiple technologies at one time.

wcf2 tutorials A Simple Story to Understand WCF

The frustrated architecture finally went to MICROSOFT to find one solution. He was then introduced toWCF. And after implementing WCF the architecture and the team lived happily ever after.

Liked the story??

wcf1 tutorials A Simple Story to Understand WCF

In short WCF is a unification technology which unites the following technologies:-

.NET remoting
MSMQ
Web services
COM+

Hello world!

admin

August 23, 2012

Welcome to WordPress. This is your first post. Edit or delete it, then start blogging!

The global XML Object

Extending XML.prototype

ignoreComments

ignoreProcessingInstructions

ignoreWhitespace

prettyPrinting

prettyIndent

JavaScript Date Format:

Extending `XML.prototype`

`ignoreComments`

`ignoreProcessingInstructions`

`ignoreWhitespace`

`prettyPrinting`

`prettyIndent`