duplicate values - Page 549

Preventing $.POST hijack

- by Jamie

I'm currently building a facebook application. Lets say I have a variable $uid that identifies the user so I can store this in my database along with their submitted data. I pass $uid and $data via json encoded values using $.post. However, this doesn't prevent someone changing $uid to save data as someone else. I have been thinking about how to overcome this, so far I haven't found a solution apart from: create database with $uid $secretkey on first page load. When $.post send $secretkey with the post and then retrieve the $uid from the database. Would this be the correct approach to use?

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PHPMailer erroring out with Call to undefined method PHPMailer::SetFrom()

- by dotty

Hay I'm using PHPMailer to send some simple emails, however the function SetFrom() doesn't seem to work, even though the code I'm using is straight from phpmails docs (http://phpmailer.worxware.com/index.php?pg=examplebmail) Here my error Call to undefined method PHPMailer::SetFrom() and my script require_once('inc/phpmailer/class.phpmailer.php'); $mail = new PHPMailer(); // defaults to using php "mail()" $body = $message; $mail->SetFrom('[email protected]', 'tell a friend'); $mail->AddAddress($to_email, $to); $mail->Subject = "tell a friend"; $mail->MsgHTML($body); $mail->Send(); Any ideas? EDIT turns out the SetFrom() function doesnt exist in my version of phpmailer, i can set these values using $mail->From = ''; $mail->FromName = '';

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Python if statement efficiency

- by Dennis

A friend (fellow low skill level recreational python scripter) asked me to look over some code. I noticed that he had 7 separate statements that basically said. if ( a and b and c): do something the statements a,b,c all tested their equality or lack of to set values. As I looked at it I found that because of the nature of the tests, I could re-write the whole logic block into 2 branches that never went more than 3 deep and rarely got past the first level (making the most rare occurrence test out first). if a: if b: if c: else: if c: else: if b: if c: else: if c: To me, logically it seems like it should be faster if you are making less, simpler tests that fail faster and move on. My real questions are 1) When I say if and else, should the if be true, does the else get completely ignored? 2) In theory would if (a and b and c) take as much time as the three separate if statements would?

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Creating a castable entity class wrapper

- by Tony

Hi I need to have a wrapper class that exposes some properties of my entity class called ProfileEntity. I tried doing it by deriving from this entity and then creating properties that return specific entity properties, but it says I cannot cast from ProfileEntity to ProfileEntityWrapper. When I try to put the return values of a method that returns a 'ProfileEntity' into the wrapper I get the above error. How do I create such a wrapper class that is castable? Example class ProfileEntityWrapper : ProfileEntity { public string Name { get { return this.ProfileEntityName; } } public class Someclass { public ProfileEntity SomeMethod() { return ProfileEntity; // example of method returning this object } } public class SomeOtherlClass { SomeClass sc = new SomeClass(); public void DoSomething() { ProfileEntityWrapper ew = (ProfileEntityWrapper)sc.SomeMethod(); // Cannot do this cast!!! } }

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How to determine whether a dependency object implements a given dependency property (C# / WPF)

- by Tim Coulter

I am working with the classes in the System.Windows.Documents namespace, trying to write some generic code that will conditionally set the value of certain dependency properties, depending on whether these properties exist on a given class. For example, the following method assigns an arbitrary value to the Padding property of the passed FrameworkContentElement: void SetElementPadding(FrameworkContentElement element) { element.SetValue(Block.PaddingProperty, new Thickness(155d)); } However, not all concrete implementations of FrameworkContentElement have a Padding property (Paragraph does but Span does not) so I would expect the property assignment to succeed for types that implement this property and to be silently ignored for types that do not. But it seems that the above property assignment succeeds for instances of all derivatives of FrameworkContentElement, regardless of whether they implement the Padding property. I make this assumption because I have always been able to read back the assigned value. I assume there is some flaw in the way I am assigning property values. What should I do to ensure that a given dependency property assignment is ignored by classes that do not implement that property? Many thanks for your advice. Tim

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May a NSManagedObjectContext re-fault objects automatically?

- by frenetisch applaudierend

I am trying to create an application which allows background threads to update core data objects while the user might be reading the same data. My approach to this would be to use multiple NSManagedObjectContexts and then before a background thread does a -save: operation, I fetch the object the user is currently working on and fire the fault for all its properties and relationships recursively. This way I have all objects the user could act with in my NSManagedObjectContext without seeing the already updated values. But this can only work if the NSManagedObjectContext cannot decide himself that e.g. memory usage is too high, and starts faulting objects which I do not explicitly reference (other than through the NSManagedObject relationship). So the question is, can the NSManagedObjectContext decide that an object needs to be re-faulted, without intervention from my side? Thanks for your effort, Markus

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How are lists implemented in Haskell (GHC)?

- by eman

I was just curious about some exact implementation details of lists in Haskell (GHC-specific answers are fine)--are they naive linked lists, or do they have any special optimizations? More specifically: Do length and (!!) (for instance) have to iterate through the list? If so, are their values cached in any way (i.e., if I call length twice, will it have to iterate both times)? Does access to the back of the list involve iterating through the whole list? Are infinite lists and list comprehensions memoized? (i.e., for fib = 1:1:zipWith (+) fib (tail fib), will each value be computed recursively, or will it rely on the previous computed value?) Any other interesting implementation details would be much appreciated. Thanks in advance!

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SqlDateTime overflow thrown by Typed DataSet Insert

- by end-user

I'm using a Typed DataSet with an Insert statement; I have a table that has a smalldatetime field defined to accept null values. When I insert from a .NET 2.0 FormView, I get a "SqlDateTime overflow. Must be between 1/1/1753 12:00:00 AM and 12/31/9999 11:59:59 PM." Now, I've read this post, and the parameter as sent to the class constructor is defined as global::System.Nullable<global::System.DateTime> DoB So, it looks like it should accept a Nullable obj. Additionally, the generated code is testing the value sent. if ((DoB.HasValue == true)) { command.Parameters[6].Value = ((System.DateTime)(DoB.Value)); } else { command.Parameters[6].Value = global::System.DBNull.Value; } Specifically, the error is occurring when generated SqlClient.SqlCommand.ExecuteScalar() runs: try { returnValue = command.ExecuteScalar(); } So, I guess my question is: how do I use a Typed DataSet to set a blank value (passed from a FormView on CommandName=Insert) to a null in a database?

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Java Spam Filter

- by JackSparrow

I'm trying to create a spam filter in Java using the Bayesian algorithm. I use a text file that contains email messages and split the tokens using regex, storing these values into a hashmap. My problem is, with regex, the email addresses are split so instead of: [email protected] regex causes the token to be: john smith example The same holds true for ip addresses, so for example, instead of: 192.55.34.322 regex splits the tokens to be: 192 55 34 322 So does anybody know of a way that I could read the email messages and store their contents as is?

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How to decode Google spreadsheet's Json respose as a Php Array

- by Mohammad

My google Docs Spreadsheet call returns this response in the json format (I only need everything after "rows") please look at the formatted response here : ) I use php's json_decode function to parse the data and use it (Yes, I am awful at php) This code returns NULL, and according to the documentation, NULL is returned "if the json cannot be decoded". $json = file_get_contents($jsonurl); $json_output = json_decode($json); var_dump ($json_output); // Returns NULL Basically, what i want to accomplish is to make a simple array from the first row values of the Json response. like this $array = {'john','John Handcock','[email protected]','2929292','blanc'} You guys are genius, I would appreciate your insight and help on this very much! Answer as "sberry2A" mentions bellow, the response is not valid Json, google offers the Zend Json library for this purpose, tho I decided to parse the tsv-excel version instead :)

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accessing $_SESSION when using file_get_contents in PHP

- by hairdresser-101

I am basic - intermediate developer using php and am a little stumped as to what I have found. I need some help in understanding how to alleviate this issue: I have a page called send.email.php which sends an email - pretty simple stuff - I pass an order id, it creates job request and sends it out. This works fine when used in the context I developed it (Use javascript to make an AJAX call to the URL and pass the order_id as a query parameter) I am now trying to reuse the exact same page in another application however I am calling it using php file_get_contents($base_url.'admin/send.email.php?order_id='.$order_id). When I call the page this way, the $_SESSION array is empty isempty() = 1. Is this because I am initiating a new session using file_get_contents and the values I stored in the $_SESSION on login are not available to me within there? Any help? Thanks

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Removing duplicates without overriding hash method

- by Javi

Hello, I have a List which contains a list of objects and I want to remove from this list all the elements which have the same values in two of their attributes. I had though about doing something like this: List<Class1> myList; .... Set<Class1> mySet = new HashSet<Class1>(); mySet.addAll(myList); and overriding hash method in Class1 so it returns a number which depends only in the attributes I want to consider. The problem is that I need to do a different filtering in another part of the application so I can't override hash method in this way (I would need two different hash methods). What's the most efficient way of doing this filtering without overriding hash method? Thanks

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Consuming secured WCF service through basicHTTPbinding

- by Jason M

I am consuming an secured service hosted over basicHttpBinding I have to pass credentials to the service for authenticatioon Here’s the config setting for the client <security mode="TransportWithMessageCredential"> <transport clientCredentialType="None" proxyCredentialType="None" realm="" /> <message clientCredentialType="UserName" algorithmSuite="Default" /> </security> While calling the service, I am getting following exception message An unsecured or incorrectly secured fault was received from the other party. See the inner FaultException for the fault code and detail. Message = "An invalid security token was provided (Bad UsernameToken Values)” I not sure how to get it working I am curious if somebody can help me out or provide me any url where I could find the solution

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Test Driven Development For Complex Methods involving external dependency

- by bill_tx

I am implementing a Service Contract for WCF Service. As per TDD I wrote a test case to just pass it using hardcoded values. After that I started to put real logic into my Service implementation. The actual logic relies on 3-4 external service and database. What should I do to my original test case that I wrote ? If i Keep it same in order to make test pass it will have to call several other external services. So I have question in general what should I do if I write a test case for a Business Facade first using TDD and later when I add real logic, if it involves external dependency.

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PRG in ASP.NET MVC but with object data transferred to the redirected action

- by mare

Following Post-Redirect-Get pattern as described in various spots but maybe in most detail here by Stephen Walter I want to use RedirectToAction but it does not accept a parameter for sending object to it. I can only send route values either as an object or as an RouteValueDictionary. So currently I send object ID and type and pull the object out of the datastore again in the action to which I redirected (like Results). // redirect to confirm view return RedirectToAction("ChangeSuccess", "Redirect", new { slug = tabgroup.Slug, contentType = tabgroup.ContentType }); But I would like to send an object there because I already have it in my updating controller action so I don't need to pull it out again. Is that possible somehow?

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Using STL/Boost to initialize a hard-coded set<vector<int> >

- by Hooked

Like this question already asked, I'd like to initialize a container using STL where the elements are hard-coded in the cleanest manner possible. In this case, the elements are a doubly nested container: set<vector<int> > A; And I'd like (for example) to put the following values in: A = [[0,0,1],[0,1,0],[1,0,0],[0,0,0]]; C++0x fine, using g++ 4.4.1. STL is preferable as I don't use Boost for any other parts of the code (though I wouldn't mind an example with it!).

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Python: Split by 1 or more occurrences of a delimiter

- by Adam Matan

Hi, I have a formatted string from a log file, which looks like: >>> a="test result" That is, the test and the result are split by some spaces - it was probably created using formatted string which gave test some constant spacing. Simple splitting won't do the trick: >>> a.split(" ") ['test', '', '', '', ... '', '', '', '', '', '', '', '', '', '', '', 'result'] split(DELIMITER, COUNT) cleared some unnecessary values: >>> a.split(" ",1) ['test', ' result'] This helped - but of course, I really need: ['test', 'result'] I can use split() followed by map + strip(), but I wondered if there is a more Pythonic way to do it. Thanks, Adam

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DTO or Domain Model Object in the View Layer?

- by smayers81

I know this is probably an age-old question, but what is the better practice? Using a domain model object throughout all layers of your application, and even binding values directly to them on the JSP (I'm using JSF). Or convert a domain model object into a DTO in the DAO or Service layer and send a lightweight DTO to the presentation layer. I have been told it makes no sense to use DTOs because changes to the database will result in changes to all your DTOs whereas using Model Objects everywhere will just require changes to the affected model object. However, the ease of use and the lightweight nature of DTOs seems to outweigh that. I should note that my app uses Hibernate Model Objects AND uses its own custom-created model objects (meaning not bound to any DB session, always detached). Is either of the above scenarios more beneficial to a strict Model Object pattern? Using Hibernate has been a huge PITA with regards to things like Lazy Initialization Exceptions.

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JSP tag lifecycle

- by mkoryak

i just introduced a bug into my code because i seem to have misunderstood the jsp tag lifecycle. The tag worked like this before the bug: i pass the tag some collection as an attribute, and it displays it as a table. The collection was passed into the JSP from the controller. after the bug: a removed the attribute which set the collection. instead, in the tag i check if the collection is null, and then grab it by name from the request (using a naming convention). the thing that i didnt expect: after the collection was initially set in the tag, it would never become null on subsequent executions! it was still defined as an non-requred attribute in the TLD. I expected the tag to not hold on to previous values between executions.

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What does this xkcd code do?

- by cobbal

On the xkcd site today, the following appeared as a joke in a <script language="scheme"> tag so what does the following code do / represent? (define (eval exp env) (cond ((self-evaluating? exp) exp) ((variable? exp) (lookup-variable-value exp env)) ((quoted? exp) (text-of-quotation exp)) ((assignment? exp) (eval-assignment exp env)) ((definition? exp) (eval-definition exp env)) ((if? exp) (eval-if exp env)) ((lambda? exp) (make-procedure (lambda-parameters exp) (lambda-body exp) env)) ((begin? exp) (eval-sequence (begin-actions exp) env)) ((cond? exp) (eval (cond->if exp) env)) ((application? exp) (apply (eval (operator exp) env) (list-of-values (operands exp) env))) (else (error "Common Lisp or Netscape Navigator 4.0+ Required" exp))))

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copying a struct with a struct member to another struct

- by user1839295

is the following code correct? typedef struct { int x; int y; } OTHERSTRUCT; struct DATATYPE { char a; OTHERSTRUCT b; } // ... // now we reserve two structs struct DATATYPE structA; struct DATATYPE structB; // ... probably fill insome values // now we copy structA to structB structA = structB; Are both structs now completely identical? Even the "struct in the struct"? Thanks!

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Python script to get the data from the flex application

- by nimmyliji

Hi, I am making a simple Python CGI script that collects data(in xml format) from a flex application and I want to insert it into the mysql database . In perl The script is looks like the following... my @samplexml=$cgi->param("Items"); my $data=$xml->XMLin("@samplexml"); foreach my $e(@{$data->{Group}}) { my $sample="Insert into details(title,Parent,Istreeitem) Values('$e->{title}','$e->{Parent}','$e->{IsTreeItem}')"; my $sam=$dbo->prepare($sample); $sam->execute(); } But I want to know how to write these codes in pytrhon script.... Any one can help me? Thanks in advance. Nimmy.

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Rails timezone differences between Time and DateTime

- by kjs3

I have the timezone set. config.time_zone = 'Mountain Time (US & Canada)' Creating a Christmas event from the console... c = Event.new(:title = "Christmas") using Time: c.start = Time.new(2012,12,25) = 2012-12-25 00:00:00 -0700 #has correct offset c.end = Time.new(2012,12,25).end_of_day = 2012-12-25 23:59:59 -0700 #same deal using DateTime: c.start = DateTime.new(2012,12,25) = Tue, 25 Dec 2012 00:00:00 +0000 # no offset c.end = DateTime.new(2012,12,25).end_of_day = Tue, 25 Dec 2012 23:59:59 +0000 # same I've carelessly been using DateTime thinking that input was assumed to be in the config.time_zone but there's no conversion when this gets saved to the db. It's stored just the same as the return values (formatted for the db). Using Time is really no big deal but do I need to manually offset anytime I'm using DateTime and want it to be in the correct zone?

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asp.net mvc json 2 times post to the controller

- by mazhar kaunain baig

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asp.net rangevalidator for calendar extender entries gives problems in safari

- by Robin Baralla

Hi there, I have the following scenario: arrival and departure dates have to be selected on a form, through 2 textboxes with a calendar extender each. I validate the entries to check that no date before today is selected and to check that the departure is after the arrival. I used a rangevalidator and a comparevalidator. In IE, Firefox and Opera it is working fine, in Safari (on windows) however both the validators go off even on entries that should be accepted. It makes me suspect that the date format dd/MM/yyyy causes trouble for Safari. (the dd/MMMM/yyyy also gave the same troubles in the other browsers, probably due to the dependency on UIculture) The code is: The range validator gets its values in code behind on Page_load RangeValidator1.MinimumValue = DateTime.Now.AddDays(1).ToShortDateString(); RangeValidator1.MaximumValue = DateTime.Now.AddMonths(12).ToShortDateString(); Does anybody have any suggestions on how to solve this problem with safari? best regards, Robin

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- by Jamie

- by dotty

- by Dennis

- by Tony

- by Tim Coulter

- by frenetisch applaudierend

- by eman

- by end-user

- by JackSparrow

- by Mohammad

- by hairdresser-101

- by Javi

- by Jason M

- by bill_tx

- by mare

- by Hooked

- by Adam Matan

- by smayers81

- by mkoryak

- by cobbal

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