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• Are there actually lag times to remove an email address from "the system"? [closed]

  - by Alex Gosselin

  For example, you send an unsubscribe message to a legitimate company or a spam, they reply that they will remove you and it may take up to 72 hours to take effect. I find it hard to believe anything that simple could take more than 3/4 of a second to take effect system wide. Another example would be when you call the visa activation line, there is a "delay" of several minutes while they try to sell you some kind of insurance. Usually just as you get the point across that you don't want it they will tell you your card has been activated and let you go. Are these delays real?

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• Why Python language does not have a writeln() method?

  - by systempuntoout

  If we need to write a new line to a file we have to code: file_output.write('Fooo line \n') Are there any reasons why Python not has a writeln() method?

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• Desired features for C++

  - by bytepusher

  I am a full time C++ developer, and I really like the language. I think it is suited for almost any kind of application. Some people claim Java and C# are better suited for high level programming, but I'm not so sure about this. I have worked with all three languages, and when using C++, it happens only now and then I come across something that might be improved. What features would you like to see added to C++? I'm talking about big improvements, not details like typesafe enums.

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• OOP beginner: classB extends classA. classA already object. method in classB needed.. etc.

  - by Yvo

  Hey guys, I'm learning myself to go from function based PHP coding to OOP. And this is the situation: ClassA holds many basic tool methods (functions). it's __construct makes a DB connection. ClassB holds specific methods based on a certain activity (extract widgets). ClassB extends ClassA because it uses some of the basic tools in there e.g. a database call. In a php file I create a $a_class = new ClassA object (thus a new DB connection). Now I need a method in ClassB. I do $b_class = new ClassB; and call a method, which uses a method from it's parent:: ClassA. In this example, i'm having ClassA 'used' twice. Onces as object, and onces via a parent:: call, so ClassA creates another DB connection (or not?). So what is the best setup for this basic classes parent, child (extend) situation? I only want to make one connection of course? I don't like to forward the object to ClassB like this $b_class = new ClassB($a_object); or is that the best way? Thanks for thinking with me, and helping :d

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• How to get it working in O(n)?

  - by evermean

  I came across an interview task/question that really got me thinking ... so here it goes: You have an array A[N] of N numbers. You have to compose an array Output[N] such that Output[i] will be equal to multiplication of all the elements of A[N] except A[i]. For example Output[0] will be multiplication of A[1] to A[N-1] and Output[1] will be multiplication of A[0] and from A[2] to A[N-1]. Solve it without division operator and in O(n). I really tried to come up with a solution but I always end up with a complexity of O(n^2). Perhaps the is anyone smarter than me who can tell me an algorithm that works in O(n) or at least give me a hint...

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• Why are interfaces unusable in PHP?

  - by streetparade

  I mean an interface definition without defining the return type makes it unusable? This makes more Clear Interface run { public function getInteger(); } class MyString implements run { public function myNumber() { } public function getInteger() { return "Not a number"; } } In Java every Interface has a return type like Integer,String,Void I know that PHP is unfortunately a loosly typed Language but isnt there a Solution for that Problem? Is it Possible to defining a Interface with a Return type like Integer?

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• Good JDBC pattern

  - by Java Developer

  What is the good practice for database operation in Java application? Do you construct the DML syntax in the Java code and send the statements to DB engine for execution, or you just collect the parameters and then make a call to stored procedure with the parameters via java code? or neither because that's just not how to do it? can anyone give an example of a full database utility classes to do database operations in Java app? also what about the transaction manager? My assignment is to make database operation that is modular in Java. Thanks

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• what's the best technology for creating a web site which manages users accounts?

  - by embedded

  I'm going to create a web site which should manage users accounts. A user opens an account and gets relevant data for his needs. What technology should I be using to create this site? Are there any templates I could use? I don't have the time to take care of the web site's desgin, Are there any places where I can buy some graphics? Thanks

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• How to break up a table holding 100mil+ number of records?

  - by Chiao

  We're currently storing answers for 52 predefined questions for our clients in our matchmaking site. we have over 30million unique users summing up for worst case of a 52x30million rows. Of these 52 questions, 11 are required and always answered. Our previous solution was to open an answer table for each question. This solution distributed our answer rows for faster insert/delete/update. But it also caused us an unconventional programming such as dynamically opening a table each time a question is added/updated, or removing an answer table if it was to be destroyed permanently. We want to come up with a better solution for our third version but could't get very far yet. Any ideas to accomplish this in any other, perhaps a more conventional, way?

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• How to set value from other class

  - by Ram

  Its said that property should not be "Set" only and it should be "Get" as well. What should i do if I need to set value to a variable from some other class? The will keep changing so I cannot pass it through constructor. Shall I create a function for this as shown below? class A { public void SetValue() { b = new B(); b.SetTest(10); } } class B { int test; public void SetTest(int value) { test = value; } } What are the other alternatives?

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• Question About Classic MVC

  - by kernix

  Hello, In classic MVC the model notifies the view about changes made on it. In C# this means I have to subclass the View I'm interested in and in the subclassed class register to the model's event. For example, if I were to implement MVC using C# and Winforms, I had to subclass TextBox class and then register inside the MyTextBox's constructor for the model events. Am I correct? How was this issued in Smalltalk? Does one also need to subclass every View in order to register the model's events, or is there some way to dynamically add events to the views on the fly? Thanks

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• CakePHP ACL use case(s)

  - by Jonathan

  I have got a simple web app in development, i want to establish a couple of user groups; Admin, Doctors & Patients. Each group would have their access restricted to particular controller actions rather than individual content. So for example, Doctors can view patient records (index & view actions), but cannot delete them. Usually i would create a groups model, and assign the various users to a group. And filter in the beforeFilter() method to determine if the user has access. But if ACL can do the job, why right the code, right? Thanks

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• Difference between has-a and composed-of?

  - by fig-gnuton

  In OOP modeling, is there any distinction between a "has-a" relationship and a "composed-of" relationship?

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• Why is it possible to have an interface without a return type in PHP?

  - by streetparade

  Why is it possible to create an interface without specifying a return type? Why doesn't this make this interface unusable? This makes it more Clear: Interface run { public function getInteger(); } class MyString implements run { public function myNumber() { } public function getInteger() { return "Not a number"; } } In Java every Interface has a return type like Integer, String or Void I know that PHP is unfortunately a loosely typed Language but isn't there a Solution to that Problem? Is it possible to define an Interface with a return type like Integer?

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• PHP Booking timeslot

  - by boyee007

  Im developing a php booking system based on timeslot for daily basis. Ive set up 4 database tables! Bookslot (which store all the ids - id_bookslot, id_user, id_timeslot) Timeslot (store all the times on 15 minutes gap ex: 09:00, 09:15, 09:30, etc) Therapist (store all therapist details) User (store all the members detail) ID_BOOKSLOT ID_USER ID_THERAPIST ID_TIMESLOT 1 10 1 1 (09:00) 2 11 2 1 (09:00) 3 12 3 2 (09:15) 4 15 3 1 (09:00) Now, my issue is, it keep showing repeation for timeslot when i want echoing the data for example: thera a thera b thera c ------------------------------------------------- 09:00 BOOKED available available 09:00 available BOOKED available 09:00 available available BOOKED 09:15 available BOOKED available as you can see, 09:00 showing three times, and i want something like below thera a thera b thera c ------------------------------------------------- 09:00 BOOKED BOOKED BOOKED 09:15 available BOOKED available There might be something wrong with joining the table or else. The code to join the table $mysqli->query("SELECT * FROM bookslot RIGHT JOIN timeslot ON bookslot.id_timeslot = timeslot.id_timeslot LEFT JOIN therapist ON bookslot.id_therapist = therapist.id_therapist" if anyone have the solution for this system, please help me out and i appriciate it much!

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• Windows Game Loop 50% CPU on Dual Core

  - by Dave18

  The game loop alone is using 50% of CPU Usage, I haven't done any rendering work yet. What i'm doing here? while(true) { if(PeekMessage(&msg,NULL,0,0,PM_REMOVE)) { if(msg.message == WM_QUIT || msg.message == WM_CLOSE || msg.message == WM_DESTROY) break; TranslateMessage(&msg); DispatchMessage(&msg); } else { //Run game code, break out of loop when the game is over } }

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• stuck with creating rent table

  - by From.ME.to.YOU

  i want to create a php with mysql to do the following: lets say that i have a shop i want to rent, rent will be weekly or monthly. I'm searching for the best way to create this table, so i can do easy queries to calculate free weeks or months. EDIT let say i have ID, START_DATE,RENING_TYPE,CLIENT_ID where Start_date is the start date for renting, and RENTING_TYPE is weekly or monthly how should i run a query to know all the empty weeks or month so new clients may reserve that week/month for example a client reserve July month another client reserve the first week in June, if a new client logged in to my system and want to check all the available weeks/months, how can i achieve that ?

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• designing the database if depending on dynamic columns

  - by phani_yelugula

  In my project,"admin" can create text fields dynamically (using jsp +javascript) and enter can enter data in text fields for saving.in the back end i have to save them in database. here the problem is 1)how we can create columns dynamically depending on the textfields admin is creating. like if he is creating 5textfields then we should create 5 columns in database,if he going with 10 we should do 10 columns. im doing this in mysql,jsp,struts,hibernate

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• How can I make the small icon(16x16)?

  - by Cora

  Hi All, I found it difficult to make small icons look clear and clean. For instance, I made the 16x16 size icons, they looked ok in PS or AI, but after saved them as some other image types, they are not that clear at all. Is that because i used wrong color or wrong tools? I wonder if there are some special tools for making extremely small icons. So any options? How i can make them look more clear and clean? Thanks a lot!

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• need some help in c# and c [closed]

  - by amer

  Is structures considered object oriented programming like classes in c# ?

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• what service class to use to incapsulate method

  - by xbsxbs

  I have to write a simple method extractArticle() that returns Article object which is extracted from Message object. I have MessageService and ArticleService classes intended to handle tasks like this. What service class is more correctly to use to incapsulate extractArticle() funcionality? $article = MessageService::extractArticle(Message $message); or $article = ArticleService::extractArticleFromMessage(Message $message);

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• [WPF] When Should I Retrieve Values from Textbox?

  - by they_soft

  Suppose I have a Window with TextBoxes I want to use the values. Right now I'm thinking of either: 1) Updating each associated value once the cursor is out of focus, and once the user presses Ok I start the program 2) Once the user presses Ok, I retrieve all the values at once then start the program I'm not sure which one is better though. First alternative seems more modular, but there's more semantic coupling since I each new box is supposed to be updating its respective value. I realize this isn't all that important, but I'm trying to understand when to centralize and when not to. Other better approachers are appreciated too.

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• Best way to create 100% width middle column with css

  - by nick

  Hey everyone, I have a pretty standard css layout where I use a container div that is 980px wide to hold everything. The only problem is that I want to have a 1900px wide banner half way down the page that is centered in the middle and is 100% width of the page. Is there any way to do this without getting rid of the container div? so I am wanting ____________________ | | | | | | | | | | | | |___| |___| | | | | |___ ___| | | | | | | | | | | | | | | | | |___|___________|___| < 980px > container < 100% page width > Anyone know how to get that 1900px banner centered in the middle without deleting my container div? THANKS!!

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• What is a kernel (with regards to dependency injection)?

  - by RHJ

  I see the term kernel used a lot but I am not sure what it means. Can you give an example.

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• How to create many div's with 100% height?

  - by ChrisBenyamin

  I need a html document, that contains multiple div's with 100% height (screen filling) one below the other. I have tried to apply every element a height of 100%, but that won't work seamless nor clean. Maybe there is a option with JavaScript? I don't have an idea. Please suggest me your solutions. chris

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