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• How to find coordinates of a 2d equilateral triangle in C ?

  - by HJ-INCPP

  Hello, I have the coordinates (x,y) of 2 points. I want to build the third point so that these 3 points make an equilateral triangle. How can I calculate the third point? Thank you

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• Translate Java class with static attributes and Annotation to Scala equivalent

  - by ifischer

  I'm currently trying to "translate" the following Java class to an equivalent Scala class. It's part of a JavaEE6-application and i need it to use the JPA2 MetaModel. import javax.persistence.metamodel.SingularAttribute; import javax.persistence.metamodel.StaticMetamodel; @StaticMetamodel(Person.class) public class Person_ { public static volatile SingularAttribute<Person, String> name; } A dissassembling of the compiled class file reveals the following information for the compiled file: > javap Person_.class : public class model.Person_ extends java.lang.Object{ public static volatile javax.persistence.metamodel.SingularAttribute name; public model.Person_(); } So now i need an equivalent Scala file that has the same structure, as JPA depends on it, cause it resolves the attributes by reflection to make them accessible at runtime. So the main problem i think is that the attribute is static, but the Annotation has to be on an (Java)Object (i guess) My first naive attempt to create a Scala equivalent is the following: @StaticMetamodel(classOf[Person]) class Person_ object Person_ { @volatile var name:SingularAttribute[Person, String] = _; } But the resulting classfile is far away from the Java one, so it doesn't work. When trying to access the attributes at runtime, e.g. "Person_.firstname", it resolves to null, i think JPA can't do the right reflection magic on the compiled classfile (the Java variant resolves to an instance of org.hibernate.ejb.metamodel.SingularAttributeImpl at runtime). > javap Person_.class : public class model.Person_ extends java.lang.Object implements scala.ScalaObject{ public static final void name_$eq(javax.persistence.metamodel.SingularAttribute); public static final javax.persistence.metamodel.SingularAttribute name(); public model.Person_(); } > javap Person_$.class : public final class model.Person__$ extends java.lang.Object implements scala.ScalaObject public static final model.Person__$ MODULE$; public static {}; public javax.persistence.metamodel.SingularAttribute name(); public void name_$eq(javax.persistence.metamodel.SingularAttribute); } So now what i'd like to know is if it's possible at all to create a Scala equivalent of the Java class? It seems to me that it's absolutely not, but maybe there is a workaround or something (except just using Java, but i want my app to be in Scala where possible) Any ideas, anyone? Thanks in advance!

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• Accessing underlying managed object through a COM interface

  - by mfeingold

  I have a third party assembly with a public abstract class implementing a certain COM interface. Something to the effect of [ComVisible(true)] public abstract class SomeClass: ISomeInterface { .... public void Method1() {...} } The actual object is an internal object extending the SomeClass and is instantiated by the third party code Is there a way to access public methods of this class if all I have is the CCW to the ISomeInterface?

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• How to override Equals on a object created by an Entity Data Model?

  - by jamone

  I have an Entity Data Model that I have created, and its pulling in records from a SQLite DB. One of the Tables is People, I want to override the person.Equals() method but I'm unsure where to go to make such a change since the Person object is auto-generated and I don't even see where that autogen code resides. I know how to override Equals on a hand made object, its just where to do that on an autogen one.

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• Format fixed-format text file lines

  - by EugeneP

  there's a text file first second third 1 2 3 yes no ok hmmmmmmm yep_a_long_word_it_is ahahahahahahha what java functions /libs to use to align words so that they are looked like this (fixed width based on the longest column's length), let's say center align: first second third 1 2 3 yes no ok hmmmmmmm yep_a_long_word_it_is ahahahahahahha

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• Who retains intellectual property rights when 2 people jointly created a website?

  - by EddieCatflap

  Myself and one other person co-created a website for a freelancing artist. For simplicity I mean that I purely developed the site code whilst the domain and hosting setup and content were created by the other creator. Who, in effect, owns the intellectual property here? Or does the person that the site was created for own rights to the site and content once it has been declared 'live'?

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• how to implement videochat in asp.net

  - by Tarun Batta

  I am using silverlight from which I can get the output of my webcam, but I am not sure how to send my webcam output to the person with whom i am chatting. The behaviour required is that i can view the webcam view of mine as well as the person with whom i am chatting....

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• Threaded messaging system for PHP/CodeIgniter?

  - by Walker

  Is there an open source threaded messaging library for CodeIgniter? Or is it best to create the system in house? I'm looking for a private messaging system with the basic person to person interactions, reply, attach etc.

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• Rails activerecord attributes=

  - by vinhboy

  Hi, I am doing this: @person.attributes = params[:person] Can anyone give me a clue as to why doing an attributes= would cause a bunch of SQL to show in my logs? I see a couple of SELECT and even an UPDATE. I swear I am not doing a "save" -- so I have no idea why setting attributes would trigger queries. Is there a before_ of after_ filter I am missing? Thanks.

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• Using UCMA to connect to 3CX?

  - by Rodney Burton

  Has anyone used Microsoft's UCMA 2.0 SDK to connect to 3CX's free IP PBX to add voice capabilities to their application? If so, does it work? What I am trying to accomplish is having a windows form app running on 2 or more computers, and each person can connect to another person and carry on a voice conversation using their headset connected to their computer. App is in C# w/ .NET3.5 SP1.

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• Weird interview question from MS

  - by didxga

  There are two numbers, which are both between 1 and 30 inclusive. Person A knew the addition of the two numbers; Person B knew the multiplication of the two numbers; A said:"do you know what numbers are they?" B replied:"I don't know, do you know?" A:"I don't know either" then B said:"so, I knew already" then A said:"I knew either" What are the two numbers?

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• Better Reporting for CruiseControl.NET

  - by Michael Sync

  Hello, Is there any way to generate the good error report from Cruise Control? I like to get the following things in that report. The line number of File that break the build The name of developer who commited that file. (It should not be related to last person who committed because the build might be broken earlier before last person check-in. ) Thanks.

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• How do I rename an attribute using XSLT?

  - by kunjaan

  I have an xml like this: <person name="foo" gender = "male" /> I want to transform it to <person id="foo" gender="male" /> Is there a way to do that using XSLT?

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• How do I use xStream to output Java Objects with List properties?

  - by Zachary Spencer

  Hello, I am trying to output some Java objects as JSON, they have List properties which I want to be formatted as { "People" : [ { "Name" : "Bob" } , { "Name" : "Jim" } ] } However, I cannot figure out how to do this with XStream. It always outputs as { "Person" : { "Name" : "Bob" }, "Person" : { "Name" : "Bob" } Is there a way to fix this? I've put together some sample code with a unit test in github if you need something more concrete to play with: http://gist.github.com/371358 Thanks!

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• Receiving a JSON string & saving one of the array paramaters to the database as a full string

  - by ElTren

  Hi I have a JSON string that looks like this (Usingt Rails and a REST service) { person: { name:"Pepe", last:"Smith" hats:[ { team:"lakers", color:"purple"}, { team:"heats", color:"red" }] } } I want to be able to able to get that JSON, and save the Person to the database, but I want to save the "hats".. as a string to the database; without parsing it or anything like that i.e. I want to save this to SQL: hats = "[ { team:"lakers", color:"purple"}, { team:"heats", color:"red" }] }" Is there a way to do this in rails?

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• ArithmeticException thrown during BigDecimal.divide

  - by polygenelubricants

  I thought java.math.BigDecimal is supposed to be The Answer™ to the need of performing infinite precision arithmetic with decimal numbers. Consider the following snippet: import java.math.BigDecimal; //... final BigDecimal one = BigDecimal.ONE; final BigDecimal three = BigDecimal.valueOf(3); final BigDecimal third = one.divide(three); assert third.multiply(three).equals(one); // this should pass, right? I expect the assert to pass, but in fact the execution doesn't even get there: one.divide(three) causes ArithmeticException to be thrown! Exception in thread "main" java.lang.ArithmeticException: Non-terminating decimal expansion; no exact representable decimal result. at java.math.BigDecimal.divide It turns out that this behavior is explicitly documented in the API: In the case of divide, the exact quotient could have an infinitely long decimal expansion; for example, 1 divided by 3. If the quotient has a non-terminating decimal expansion and the operation is specified to return an exact result, an ArithmeticException is thrown. Otherwise, the exact result of the division is returned, as done for other operations. Browsing around the API further, one finds that in fact there are various overloads of divide that performs inexact division, i.e.: final BigDecimal third = one.divide(three, 33, RoundingMode.DOWN); System.out.println(three.multiply(third)); // prints "0.999999999999999999999999999999999" Of course, the obvious question now is "What's the point???". I thought BigDecimal is the solution when we need exact arithmetic, e.g. for financial calculations. If we can't even divide exactly, then how useful can this be? Does it actually serve a general purpose, or is it only useful in a very niche application where you fortunately just don't need to divide at all? If this is not the right answer, what CAN we use for exact division in financial calculation? (I mean, I don't have a finance major, but they still use division, right???).

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• How to use the Value of a Selected Value from a DropDownList populated with AJAX/PHP

  - by mouthpiec

  Hi, I have form with two dropdownlists (lets say A and B). When I select a value from A, B is being populated accordingly using AJAX In the same page I have a button, that when pressed, posts the values of the selected items of the dropdownlists to another PHP page. The problem I am having is that the selected value of B is returned as Blank/Empty. Is there a way to store the selected value of a dropdownlist populated using AJAX? Code below: (Main FORM) <form name="NewBar" method="post" onsubmit="return validateFormOnSubmit(this)" action="AssignContactDetailToBar_f.php"> <tr> <td width="150"><b>Bar:</b></td> <td> <select name = "bar" onChange="getContact('AssignContactDetailToBar_f_getContacts.php?bar='+this.value)" size = 1 style = "width:190px"> <option value = "">---Select---</option> <?php while ($data = mysql_fetch_array($r_getBarsDetails)) { echo "<option value=\"".$data['bar_id']."\">".$data['bar_name']." (".$data['town_name'].")</option>"; } ?> </td> </tr> <tr> <td width="150"><b>Contact Person:</b></td> <td> <div id="persondiv"><select name = "person" size = 1 style = "width:190px"> <option value = "">--Select Bar--</option> </td> </tr> <tr> <td> <input name="security" type="text" size="15"> </td> <td> <input type="submit" name="Submit" value="Submit"> </td> </tr> </form> FORM to populate the 2nd Dropdownlist <select name="person" size = 1 style = "width:190px"> <option value = "">--Select Person--</option> <?php while($data=mysql_fetch_array($result)) { echo "<option value=\"".$data['person_id']."\">".$data['person_name']." ".$data['person_surname']." (".$data['town_name'].")</option>"; } ?> if you would like to see the complete code download from here

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• Initialize static members in PHP

  - by Senthil

  class Person { public static function ShowQualification() { } } class School { public static $Headmaster = new Person(); // NetBeans complains about this line } Why is this not possible? I want to be able to use this like School::Headmaster::ShowQualification(); ..without instantiating any class. How can I do it?

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• Why Directly Accesing property is not recommended in OOPs PHP?

  - by Parth

  If I have a class "person" with a property $name and its getter(get_name()) and setter(set_name()) methods, then after instantiating the objects and setting the property i.e. $paddy = new person(); $paddy->set_name("Padyster Dave"); echo "Paddy's full name: ".$paddy->name; //WHY THIS IS NOT RECOMMENDED... In the above code $paddy->name;WHY THIS IS NOT RECOMMENDED?

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• It's possible to create variable to hold fields of class dynamically???

  - by yossharel

  hi all, In my 'Person' class, I have some fields like 'firstname','lastname','nickname' and so on. I want to write code to search dynamically, sometimes by 'firstname' and sometimes by 'nickname' field. The code I want to write, should be like this: Object someVariable = "firstname"; Person result = ListOfPerson.Where(p => p.someVariable = "exp").FirstOrDefault(); Can anyone Know if it's possible?

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• MySQL, SQL Select Statement, Where with OR... What's wrong with this?

  - by nobosh

  I'm looking for help with my query below. which is never returning anything for veggie... Is the way I have my WHERE statement written valid? SELECT * FROM newsfeed INNER JOIN newsfeedaction ON newsfeed.newsfeedactionid = newsfeedaction.newsFeedActionID INNER JOIN person ON newsfeed.personID = person.personID LEFT OUTER JOIN food ON newsfeed.foodID = food.foodID LEFT OUTER JOIN veggie ON newsfeed.veggieID = veggie.veggieID WHERE ( newsfeed.veggieID IS NOT NULL AND veggie.deleted = 'N' ) OR ( newsfeed.foodID IS NOT NULL AND food.deleted = 'N')

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• Handling exceptions raised in observers

  - by sparky

  I have a Rails (2.3.5) application where there are many groups, and each Group has_many People. I have a Group edit form where users can create new people. When a new person is created, they are sent an email (the email address is user entered on the form). This is accomplished with an observer on the Person model. The problem comes when ActionMailer throws an exception - for example if the domain does not exist. Clearly that cannot be weeded out with a validation. There would seem to be 2 ways to deal with this: A begin...rescue...end block in the observer around the mailer. The problem with this is that the only way to pass any feedback to the user would be to set a global variable - as the observer is out of the MVC flow, I can't even set a flash[:error] there. A rescue_from in the Groups controller. This works fine, but has 2 problems. Firstly, there is no way to know which person threw the exception (all I can get is the 503 exception, no way to know which person caused the problem). This would be useful information to be able to pass back to the user - at the moment, there is no way for me to let them know which email address is the problem - at the moment, I just have to chuck the lot back at them, and issue an unhelpful message saying that one of them is not correct. Secondly (and to a certain extent this make the first point moot) it seems that it is necessary to call a render in the rescue_from, or it dies with a rather bizarre "can't convert Array into String" error from webbrick, with no stack trace & nothing in the log. Thus, I have to throw it back to the user when I come across the first error and have to stop processing the rest of the emails. Neither of the solutions are optimal. It would seem that the only way to get Rails to do what I want is option 1, and loathsome global variables. This would also rely on Rails being single threaded. Can anyone suggest a better solution to this problem?

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• Is it possible in WPF to have a Panel and be able to add UserControls to it (Similar to Windows Form

  - by Sergio Tapia

  I'm going to be making a user control for person information, I will then populate a panel of some sort with the ammount of people found (one user control for each person). Can WPF handle this?

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• How to drop null values with a native Oracle XML DB Web Service?

  - by gfjr

  I am using native Oracle XML DB Web Services (using a PL/SQL function with a web service). I want to drop null values (put nothing in the output (no XML element)). It's working with Oracle 11.2.0.1.0 but not with Oracle 11.2.0.3.0. Just to clarify... I don't want to consume a webservice with PL/SQL, I want to publish my PL/SQL packages/procedures/functions as a web service! Hope someone can help me. Thank you. In this example is the column "country" null. Oracle 11.2.0.1.0 (this is what I want): <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <GET_PERSONOutput xmlns="http://xmlns.oracle.com/orawsv/TESTSTUFF/GET_PERSON"> <RETURN> <PERSON> <PERSON_ID>3</PERSON_ID> <FIRST_NAME>Harry</FIRST_NAME> <LAST_NAME>Potter</LAST_NAME> </PERSON> </RETURN> </GET_PERSONOutput> </soap:Body> </soap:Envelope> Oracle 11.2.0.3.0: <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <GET_PERSONOutput xmlns="http://xmlns.oracle.com/orawsv/TESTSTUFF/GET_PERSON"> <RETURN> <PERSON> <PERSON_ID>3</PERSON_ID> <FIRST_NAME>Harry</FIRST_NAME> <LAST_NAME>Potter</LAST_NAME> <COUNTRY/> </PERSON> </RETURN> </GET_PERSONOutput> </soap:Body> </soap:Envelope>

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• Is there a way to make a serialized member to serialize as an attribute?

  - by Shimmy

  Is there a way to make a serialized member to serialize as an attribute: <Serializable> Public Class Person Public Property Name As String End Class I want than when this class is xml-serialized, it should produce: <Person Name="John Doe" /> And what I mean is that instead of the Name property should be serialized as an element, it should be serialized as an xml attribute.

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