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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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• Java Insert Help...???

  - by El Classico

  I am trying to do an Insert, Update and Delete on a table in MS Access. Everything works fine for a SELECT statement. But when doing the other three operations, I don't seem to get any errors, but the actions are not reflected on to the DB. Please help... THe INSERT statement is as follows: PreparedStatement ps = con.prepareStatement("INSERT INTO Student VALUES (?, ?, ?, ?, ?, ?, ?, ?)"); ps.setInt(1,1); ps.setString(2,"ish"); ps.setInt(3,100); ps.setInt(4,100); ps.setInt(5,100); ps.setInt(6,300); ps.setInt(7,100); ps.setString(8,"A"); ps.executeUpdate(); Also may I know why PreparedStatement is used except for SELECT statement...

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• Saving variables (not sessions)

  - by james.bcn

  This may be a silly question, but how do I save variables that are not specific to a particular session. An simple example of why you might want to do this would be a visitor counter - a number that increases by one each time someone visits a web page (note - I'm not actually doing that, my application is different, but that is the functionality I need). The only ways I can think of doing this are either writing the variables to a file, or putting the variables into a database. Both seem a bit inelegant. Is there a better way to to this kind of thing?

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• Dynamic themes and custom styles

  - by Lawrence Kesteloot

  I've got an app with two themes (dark and light) that can be selected at runtime. This works. I also have a ListView with rows that can have one of three different layouts, each of which has a style (say, different colors). This also works. But I can't get these two features to work together. I really need six different styles, three for one theme (dark) and three for the other (light), but I can't figure out how to choose a style for a list item based on the current theme, or get that effect any other way by using XML files. My three layouts each point to a custom theme that sets the color, but that overrides whatever theme I've got set. Themes can only contain items that are "styleable", so I can't put my own custom items in there. There may be a way to do this programmatically, but I was hoping to do it declaratively. Any ideas?

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• Where is the best place to store globals in Rails app?

  - by Nick Gorbikoff

  Hello. I was wondering if there is the best practice on where to store global settings in a rails app. What I mean by that is i.e: I have a few globals defined that may change, but not likely and it seems inappropriate to store them in DB since they are used so much. For instance I have SYSTEM_EMAIL & SYSTEM_EMAIL_SIGNATURE & SYSTEM_STORAGE_ROOT. Right now I keep them in environment.rb, but I'm not sure if this is the right palce to store them. Thank you

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• Rails 2.3.8 Compound condition

  - by Michael Guantonio

  I have a rails query that I would like to run. The only problem that I am having is the query structure. Essentially the query looks like this queryList = model.find(:all, :conditions => [id = "id"]) #returns a query list #here is the issue compound = otherModel.find(:first, :select => "an_id", :conditions => ["some_other_id=? and an_id=?, some_other_id, an_id]) Where an_id is actually a list of ids in the query list. How can I write that in rails to basically associate a single id to a list that may contain ids...

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• What size should the background image in an MSI be?

  - by r_

  I am trying to create a Windows Installer package using Wix. I'm getting a lot of conflicting information about what size my custom background should be--the Wix documentation suggests a size of 500 x 314 pixels, but this leads to slight image distortion in the installer. I believe that I may be indirectly using the SplashBitmap property in Windows Installer, whose documentation suggests 480 x 320 is the correct size. When I try to use this image size, I also get artefacts in the image. Could anyone tell me what the correct size should be?

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• How to check the status (True/False) in a grid view on rowdatabound event?

  - by NayeemKhan

  Hi all, I have a table with three columns (ProdID,ProdName,Status). I m fetching that into a dataSet and binding that to my gridview. I have a very basic and simple rowdatabound event like this : protected void gvProducts_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { if (e.Row.Cells[2].Text == "False") { e.Row.BackColor = System.Drawing.Color.PaleVioletRed; } } } But when i see my 3rd column (Status), it is converted to a checkbox, may be becz its containing only 'True' or 'False'. Also in my if condition : if (e.Row.Cells[3].Text == "False") the text value is showing this : "" Can anybody suggest me, how can i compare my status against True or False in my if condition.

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• Can I un-assign (clear) all fields of an instance?

  - by Roman

  Is there a simple way to clear all fields of an instance from a an instance? I mean, I would like to remove all values assigned to the fields of an instance. ADDED From the main thread I start a window and another thread which controls state of the window (the last thread, for example, display certain panels for a certain period of time). I have a class which contains state of the window (on which stage the user is, which buttons he already clicked). In the end, user may want to start the whole process from the beginning (it is a game). So, I decided. So, if everything is executed from the beginning, I would like to have all parameter to be clean (fresh, unassigned). ADDED The main thread, creates the new object which is executed in a new thread (and the old thread is finished). So, I cannot create a new object from the old thread. I just have a loop in the second thread.

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• e-library system development

  - by mmcc

  I want to develop an web based library system, and it may feature a "add this book to cart" function, and in its cart page, user can set the book reservation date and click 'Ok' button to finish the reservation process. On the backend side, the admin management page can check that reservation request information. To achieve this function, which way can do so? 1. Asp.net MVC + C# + MSSQL 2. Dotnetnuke (i don't know if this CMS can help) or any idea ?

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• Clojure: find repetition

  - by demi

  Let we have a list of integers: 1, 2, 5, 13, 6, 5, 7 and I want to find the first number has a duplicate before it and return a vector of two indices, In my sample, it's 5 at [2, 5]. What I did so far is loop, but can I do it more elegant, short way? (defn get-cycle [xs] (loop [[x & xs_rest] xs, indices {}, i 0] (if (nil? x) [0 i] ; Sequence is over before we found a duplicate. (if-let [x_index (indices x)] [x_index i] (recur xs_rest (assoc indices x i) (inc i)))))) No need to return number itself, because I can get it by index and, second, it may be not always there.

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• Part-time Programming Job

  - by Bluechip Solutions

  I am a student at Middlesex Universtity, London studying Information Technology. I really love software development and I have taught myself how to write HTML + CSS, JavaScript (I use jQuery and AngularJS) and Java (I learnt this in school). I have developed few apps (a desktop app in Java and a mobile app with AngularJS and PhoneGap) I am looking at applying for a part-time programming job to develop myself. Are there part time jobs available for someone like me and are my skill set enough to get me a job? I understand this topic may not be ideal here but this is the only place I know can provide me answers. Thank you!

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• Why can't I view a directory in Linux?

  - by Thread7

  I am setting up a Linux web server running apache. I uploaded and untared my web sites files. The files in the main directory are all visible when I am SSH'd into the system. However, I am blocked from all subdirectories. If I write: # cd images Then I get the error: -bash: cd: images: Permission denied I am signed in as ec2-user. I untarred the stuff as ec2-user and I doubt there was any permissions in the tar file since I created the archive on a Windows system. The weird thing is that I am the owner of this directory. Here is a snippet of the command: ls -l drw-rw-r-- 19 ec2-user ec2-user 4096 May 4 04:09 images When I do "sudo su" and then type the command cd images everything is fine. Why do I get "Permission denied" as ec2-user if I am the owner and have rw permission?

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• Need to sync two lists with atrribute time, but times aren't equal

  - by virgula24

  I gonna try to describe my problem the best i can. I have two lists, one with audio frames and other with color frames (not relevant). Both of them have timestamps, they were captured at the same moment but at different instants. So, i have like this: index COLOR AUDIO 0 841 846 1 873 897 2 905 948 3 940 1000 the frames start at high numbers because they were captured and then trimmed to specific parts, but im shot, frame 0 is synced with only 5ms apart(timestamp in ms). On every case i have, the audio frames count is less than the color count. I need to make them have the same count. The stating frames may be coloraudio, color

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• New datatype which can have numbers upto 100 digits.

  - by ckv

  Note: This was an interview question and may not have an actual use case currently The question was to design a class that can store numbers which are very very large say each number can have 100 digits. This new class is a datatype like int. What are the different types of constructors, overloads and other functions that you would write. How can this be further extended to support really large floating point numbers. How this can be given to others so that they can reuse the same component with their own additional functionality. My answer consisted of 2 approaches 1. using array of integers to store every say 10 digits 2. using string itself to store the number and perform operations on individual numbers. What would be the best approach?

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• read after lseek always return 0

  - by Wins

  I'm having an issue reading byte in file after performing lseek long cur_position = lseek(fd, length * -1, SEEK_CUR ); // Rewind file reading by length bytes. printf("cur_position: %i\n", cur_position); int num_byte = read(fd, &byte, 1); printf("num_byte = %i\n", num_byte); With the initial variable length set to 34, the above code would produce cur_position 5 (so there are definitely at least 34 bytes after the lseek function returns), but the variable num_byte returned from function read always returns 0 even though there are still more bytes to read. Does anyone know the reason num_byte always return 0 or do I make mistake in the above code? Just for information, the above code was run on the following machine $ uname -srvpio Linux 3.2.0-24-generic #39-Ubuntu SMP Mon May 21 16:52:17 UTC 2012 x86_64 x86_64 GNU/Linux

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• Qt QMainWindow at Close

  - by Cenoc

  Hey, this may seem like a very simple question, but I want to dump some data whenever the QMainWindow closes, so I used the following piece of code: QObject::connect(MainWindow.centralwidget, SIGNAL(destroyed()), this, SLOT(close())); but this doesnt seem to make it call close(). Am I doing this wrong? Isnt the centralwidget suppose to be destroyed? Or perhaps the application closes before close() can be called? Any other ways of doing it then? Thanks in advance!

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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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• Java-Counting occurrence of word from huge textfile

  - by Naveen

  I have a text file of size 115MB. It consists of about 20 million words. I have to use the file as a word collection, and use it to search the occurrence of each user-given words from the collection. I am using this process as a small part in my project. I need a method for finding out the number of occurrence of given words in a faster and correct manner since i may use it in iterations. I am in need of suggestion about any API that i can make use or some other way that performs the task in a quicker manner. Any recommendations are appreciated.

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• headfile conflict let every line becomes "not declared"

  - by altria

  I have a.h a.cpp b.h and a library for b. The thing is, if I choose to include b.h in either a.h or a.cpp, it will let complier return "was not declared in this scope" for every line of a.h. The same program works fine on another computer, although Makefile might be different. I have to admit, I think I may have change some settings, but I forgot which one I changed. Is there anybody have any idea? I am using linux and gcc.

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• Jquery plugin for getting changes in textarea and sending them to server

  - by user763410

  I am getting a file "abc.txt" from server and dispaying it in a text area for editing. <div id="filecontents"> <textarea> CONTENTS OF FILE LARGER THAN 10KB </textarea> </div> The contents of the file are potentially large. The user will edit the textarea and add/delete text from any part(not just the end). I want to send ONLY the changes to the server for patching. How do I accomplish this?. Is there a javascript version of the popular linux command(diff). John Resig's diff code may not work as, for me, it will involve additional parsing on server side. Thanks!

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• C++ file including C header file

  - by fdeslaur

  I need to include a C header file in my C++ project but g++ throws "not declared in this scope" errors. I read that i need to use extern "C" keyword to fix it but it didn't seem to work for me. Here is a dummy example triggering this error. main.cpp: #include <iostream> extern "C" { #include "includedFile.h" } int main() { int a = 2; int b = 1212; std::cout<< "Hello World!\n"; return 0; } includedFile.h #include <stdint.h> enum TypeOfEnum { ONE, TWO, THREE, FOUR = INT32_MAX, }; The error thrown is : $> g++ main.cpp In file included from main.cpp:4:0: includedFile.h:7:9: error: ‘INT32_MAX’ was not declared in this scope FOUR = INT32_MAX, I saw on this post that I may need #define __STDC_LIMIT_MACROS without any success. Any help is welcome!

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• How to use composition from another class to set Name?

  - by user1874549

  I have some of the code here. I am trying to use one class to reference another so I may obtain the first name of the person. I want the firstName in main class to work but IDE mentions the variable isn't found. Will replacing 'first' with 'firstName' work? Main class: public BasePlusCommissionEmployee( String first, String last, String ssn, double sales, double rate, double salary) { cE = new CommissionEmployee( first, last, ssn, sales, rate ); setBaseSalary( salary ); } public void setFirstName(String firstName) { // Trying to get this to work... cE.setFirstName(first); } SubClass: private String firstName; public void setFirstName( String first ) { firstName = first; }

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• animate each child jquery

  - by Martavis P.

  It's amazing how simple this should be but I can't get it to work. I'm looking to animate a set of divs one at a time. I am using animate.css for those familiar with it. I thought I may have found the answer here but jsFiddle is not working at the moment. Anywho, the code is $('.elements').each(function(i) { $(this).addClass('animated slideInLeft').delay(500); }); The problem is that when I debug and step through each element, the animation is happening for each element but when I let it run, it appears to all do it at once. What is needed to actually show the animation one at a time? Thanks EDIT: jsFiddle is back up and that link provided below did not help. The answer did not include looping through elements, but looping the animation itself. EDIT 2 Here is a Fiddle to play with if you guys need one.

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• how to visualize (value, count) dataset with thousands data points

  - by user510040

  I have a file with 2 numeric columns: value and count. File may have 5000 rows. I do plot(value, count) to find the shape of distribution. But because there are too many data points the picture is not very clear. Do you know better visualization approach? Probably histograms or barplot with grouping close values on x axis will be the better way to look on data? I cannot figure out the syntax of using histogram or barplot for my case.

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