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• Looking for Suggestion on Multi-Consumer Service Development

  - by DaveDev

  How would I model a system that needs to be able to provide content in a format that would be consumable by iphone, Android or web browser (or whatever). All a new consumer would have to do is build a UI with rules on how to handle the data. I'm thinking something RESTful returning JSON or something. I'm really looking for suggestions on the kinds of things I'd need to learn in order to be able to implement a system on this scale. As an ASP.NET MVC developer, would that be the best framework/archetectrue to go with? Thanks

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• Ubuntu 10.04 RGBA(Transparent theme) bug

  - by Nrew

  I tried to follow this tutorial frome ghacks.net. But I end up with a bug. Everytime I try to change the desktop background or the theme. It opens up lots of folders. And then close it back again. So I cannot do anything when I try to change the background or the theme to the default. Here is the tutorial And I can't even shutdown my machine now, please help. EDIT I tried executing these commands in the terminal sudo add-apt-repository ppa:erik-b-andersen/rgba-gtk sudo apt-get update && sudo apt-get upgrade sudo apt-get install gnome-color-chooser gtk2-module-rgba sudo apt-get install murrine-themes And it installed gnome color changer. It works, and the windows became transparent, but I can't change to the default theme and I can't put a background Here's the screenshot, when I try to change something in the preferences: Its just okay if I can't change the theme, but it won't let me change the background either. Or maybe the background is changed but its transparent just like the other windows. You can see that in the taskbar(or whatever its called in Ubuntu). Its full. What can I do to atleast make the background visible.

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• Wmode transparent and symbols issue with foreign keyboard

  - by Boun

  Hello, I have the known issue with wmode transparent and input textfield in my page. I know that the question is often asked but I have a special situation with that case. I need to embed my swf with wmode=transparent but in my swf I have an input textfield and the bug with "@" or "." symbols exists. I have a french keyboard and I decided to overcome this problem with a string replacement with the FirefoxWmodeFix class from Manmaru (see the link below). http://www.manmaru.fr/mlab/?p=95 It works for my keyboard but I need that "trick" with EN/DE/IT keyboard. Could anyone help me with the right combination of keys on different keyboard and different OS system to display "@" and "." symbols. I don't have any foreign Windows system to get the key code for each combination. Or if anyone has another solution, I will be pleased to hear that one. Thanks in advance for any help.

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• Aspnet Redirect using location tag

  - by Learner

  <location path="/home/address?city="jcity" allowOverride="true"> <system.webServer> <validation validateIntegratedModeConfiguration="false" /> <httpRedirect enabled="true" httpResponseStatus="Permanent" exactDestination="true" destination="/home/jerseycity" /> </system.webServer> </location> I get an error since location tag can not use "?" tag. What is the best way to do this redirect?

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• How to close the prefetch of cache in windows?

  - by MainID

  In a C/C++ program, how to close the prefetch of each core in the Windows system?

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• How do I get the XAML comiler to use textual content property on custom classes?

  - by Duncan

  Given a simple C# class definition like: [System.Windows.Markup.ContentProperty("PropertyOne")] public class SimpleBase { public string PropertyOne { get; set; } public string PropertyTwo { get; set; } } why is it not possible to ommit the sys:string tags around the word Test in the xaml below. <custom:SimpleBase x:Class="TestType" xmlns:custom="clr-namespace:ConsoleApplication1;assembly=" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:sys="clr-namespace:System;assembly=mscorlib"> <sys:String>Test</sys:String> </custom:SimpleBase> Somehow the compiler correctly coverts text to string for the type String, why doesn't it work for my custom type? The context can be found on my blog: http://www.deconflations.com/?tag=xaml

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• Windows 7 boot problem on a Lenovo Thinkpad Z61m 9450HAG

  - by Matt Taylor

  I recently did a full upgrade of Windows 7 on my Thinkpad. Everything worked fine after up until the second reboot (the first reboot after some updates installed worked OK). At second reboot time the system would just black screen before the Windows logo appears. Disk/wireless/power/battery lights are all lit and the disk light is active (flickering). However, if I remove my battery and boot with just power it boots fine and quickly, and everything is OK. Any help on why this won't boot with battery plugged in is greatly appreciated. I need to take this battery out on the road/trains, etc. A little more detail on this story. The battery I had inserted when doing the (failed) boot was a long life battery. I have not tried inserting this battery when Windows is logged in. I have another (normal life) battery that I have charged up within Windows. It has just got to 100% and I am about to reboot with it in. I am using the Lenovo power manager to diagnose the battery - all seems OK. I will report back shortly as to the outcome. OK, so I chose the reboot option from within Windows, the machine seemed to shutdown okay, but then stalled. It didn't turn off completely and didn't reboot, but just sat, with the fan humming, somewhere in between! I had to hold the power button in for a few seconds until the fan stopped and then hit the power button again to boot the machine from fresh. One good thing, with this battery (the normal one) it booted into Windows 7 the first time with a battery! So, now I have rebooting issues. I have 3 errors in the event log: A timeout was reached (30000 milliseconds) while waiting for the lxdxCATSCustConnectService service to connect. The lxdxCATSCustConnectService service failed to start due to the following error: The service did not respond to the start or control request in a timely fashion. The following boot-start or system-start driver(s) failed to load: cdrom Any thoughts?

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• Is my laptop battery dead?

  - by Josh

  Recently my laptop battery will get extremely hot (definitely hotter than it should get) when I charge it. After that I usually end up removing it once it's fully charged to let it cool down, which takes a couple hours... Question is, is my battery dead? My last battery I had that died just ended up lasting 2 - 3 minutes on battery, no weird heat issues. And is there any way to possibly fix this? Probably not but I won't be able to get a replacement anytime soon. UPDATE: A few days ago when this happened and it cooled down, assuming it was fully charged, I ran my laptop on battery, and the battery life lasted about 10 minutes and then the laptop shutdown. I then plugged it in later and charged it back up, and for a while I had a orange light blinking on my laptop - which I assumed meant the battery was dead, especially since I got 10 minutes battery life. Then today, I turned my laptop on and was surprised to see that the battery was at 20% and charging (it's been plugged in since the incident above, so it should have been fully charged when I shut it off) I let it charge up, and as usual it got pretty hot around the time it was fully charged. So I turned my laptop off and pulled the battery out to let it cool down Now the thing is, just now I tried running it on battery, and it's been going for an hour now... so maybe its not dead? (also the orange light is no longer blinking...) Thanks in advance if anyone knows whats going on, and how to fix it, if its fixable =] EDIT: Some info if it helps... my laptop is about 2 years ago, and it's an Asus K50ID. I know laptop batteries usually don't last more than a year but I'm trying to keep this one going for as long as I can.

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• Passing List (Of ChildClass) as parameter to method expecting List (Of ParentClass)?

  - by Nicholas

  Hi, I have implemented inheritance for two parent classes called Table and Field. Each parent class has several child classes. In the Table parent class, I created a method that expects parameter List(Of Field). I get an error when trying to pass in parameter List(Of ChildField) to the method that expects a parameter of List(Of Field). The error message is as below: Value of type 'System.Collections.Generic.List(Of com.hlb.icisbatch.data.ChildField)' cannot be converted to 'System.Collections.Generic.List(Of com.hlb.icisbatch.data.Field)' My question, is it possible to pass in list of child class as parameter? If it is not a list then it works fine. But somehow it is not possible with lists? Below is sample class structure: Table Field | | ChildTable ChildField I have a method in the parent class: Public Class Table Public Sub New() End Sub Public Overridable Sub setFields(ByVal list As List(Of Field) 'Do work here' End Sub End Class and method in child class: Public Class ChildTable Public Sub New(ByVal list As List(Of ChildField) setFields(ChildField) End Sub End Class

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• In writing games that deal with scancodes, what do I need to know to support international keyboards

  - by sludge

  I am writing an input system for a game that needs to be able to handle keyboard schemes that are not just qwerty. In designing the system, I must take into consideration: Two types of input: standard shooter controls (lots of buttons being pressed and raw samples collected) and flight sim controls (the button's label is what the user presses to toggle something) Alternative software keyboard layouts (dvorak, azerty, etc) as supplied by the OS Alternative hardware keyboard layouts that supply Unicode characters My initial inclination is to sample the USB HID unicode scancodes. Interested on thoughts on what I need to do to be compatible with the world's input devices and recommendation of input APIs on both platforms.

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• Two windows fullscreen on two different screen.

  - by sirithang

  Hi! I'm actually working on an app to display an image onto a Dome. The dome projection system is constitued of two projector and a pc running a GentoO Linux and KDE, with nvidia TwinView system. Since here i've used SDL to display a fullscreen windows, and it display my app onto the two screen. But i just figured that i need to project two different images, one on each projector. That's why i search for a solution to display a fullscreen window on the first screen (projector) and another on the second. But SDL fullscreen just extend the window to the two screens. I can use any librairie (since it light and free, as i will wrap it into my small "API"), or change display setting. BTW it would be nice to have openGL support, since SDL manage only one window ^^"

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• Ruby on Rails questionnaire tutorial?

  - by kovrik

  Can't find any tutorial for creating a simple questionnaire system on RoR (without using Finite State Machines). I think the Model is simple: Quizzes (have many Questions) Questions (belong to Quizzes, have many Choices, have one Answer) Choices (belong to Questions) Responses (belong to Users, belong to Questions) Users (have many Responses). User logs in (session is created), chooses some Quiz (Questions which belong to this Quiz are shown). User navigates through the Questions, makes his choice (Response), finishes the Quiz. Responses are compared with Answers. System shows some results. But as I'm new to Rails it is difficult for me to make it work properly. Any help? Maybe there is a tutorial where some similar app is created?

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• Parallel For Loop - Problems when adding to a List

  - by Kevin Crowell

  I am having some issues involving Parallel for loops and adding to a List. The problem is, the same code may generate different output at different times. I have set up some test code below. In this code, I create a List of 10,000 int values. 1/10th of the values will be 0, 1/10th of the values will be 1, all the way up to 1/10th of the values being 9. After setting up this List, I setup a Parallel for loop that iterates through the list. If the current number is 0, I add a value to a new List. After the Parallel for loop completes, I output the size of the list. The size should always be 1,000. Most of the time, the correct answer is given. However, I have seen 3 possible incorrect outcomes occur: The size of the list is less than 1,000 An IndexOutOfRangeException occurs @ doubleList.Add(0.0); An ArgumentException occurs @ doubleList.Add(0.0); The message for the ArgumentException given was: Destination array was not long enough. Check destIndex and length, and the array's lower bounds. What could be causing the errors? Is this a .Net bug? Is there something I can do to prevent this from happening? Please try the code for yourself. If you do not get an error, try it a few times. Please also note that you probably will not see any errors using a single-core machine. using System; using System.Collections.Generic; using System.Threading.Tasks; namespace ParallelTest { class Program { static void Main(string[] args) { List<int> intList = new List<int>(); List<double> doubleList = new List<double>(); for (int i = 0; i < 250; i++) { intList.Clear(); doubleList.Clear(); for (int j = 0; j < 10000; j++) { intList.Add(j % 10); } Parallel.For(0, intList.Count, j => { if (intList[j] == 0) { doubleList.Add(0.0); } }); if (doubleList.Count != 1000) { Console.WriteLine("On iteration " + i + ": List size = " + doubleList.Count); } } Console.WriteLine("\nPress any key to exit."); Console.ReadKey(); } } }

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• jQuery datepicker - change "today" date?

  - by Newbie

  Hello! Is there a way to change the "today" date in jquery.ui datepicker? With today, I mean today (class="ui-datepicker-today") and not the minDate or the current-selected date! I figured out, that datepicker uses the system time for default values. Now I get the current date from my server and set it to my minDate. But I didn't find a way to set the today-date... It still uses my system date (there are some users out there whose systemdate is in the year 2000 or earlier). Can U help me plz?

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• /clr option in c++

  - by muhammad-aslam

  hello friendzz plz give me a solution for this error "fatal error C1190: managed targeted code requires a '/clr' option" HOw can i resolve this problem?? My configuration is .. Visual studio 2008 windows 7 Here is the code (i got by using net resources) using using namespace System; using namespace System::IO; int main() { // Create a reference to the current directory. DirectoryInfo* di = new DirectoryInfo(Environment::CurrentDirectory); // Create an array representing the files in the current directory. FileInfo* fi[] = di-GetFiles(); Console::WriteLine(S"The following files exist in the current directory:"); // Print out the names of the files in the current directory. Collections::IEnumerator* myEnum = fi-GetEnumerator(); while (myEnum-MoveNext()) { FileInfo* fiTemp = __try_cast(myEnum-Current); Console::WriteLine(fiTemp-Name); } } PLZZZZZZZZ

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• biginteger calucation prfoblem

  - by murali

  hi i am using the following code but the parameters are not passed to the methods. BigInteger p = BigInteger.valueOf(0); BigInteger u1 = obj.bigi_calc(g1, l); in this g1,l are long values the method is private BigInteger bigi_calc(long g1, long l){ BigInteger cal = BigInteger.valueOf(g1); BigInteger cal1= BigInteger.valueOf(l); for(BigInteger f = BigInteger.ONE;f.compareTo(cal1)>0;f=f.add(BigInteger.ONE)){ //BigInteger p= BigInteger.valueOf(0); p = cal.multiply(cal1); System.out.println("check p"+p); } // System.out.println("check p"+p); return p; } the elipse shows that it may be out of sync.. but the paramerters are not passed to the functions.. can you plz help me to slove this problem

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• SqlCommand.Paramaters.AddWithValue issue

  - by Petrus

  Hi I have a problem with the folowwing piece of code. I am passing a parameter (List) to a methods executing the following code. When it executes sql throws an error saying that the proc expects a parameter that was not provided. I know this error and understand it, and when stepping through the code I can see that the cmdExecuteReader object has a collection of parameters, with the correct naame and value. What cou be the problem? public SqlDataReader ExecuteReader(string storedProcedure, List<SqlParameter> parameters = null) { SqlCommand cmdExecuteReader = new SqlCommand() { CommandType = System.Data.CommandType.Text, Connection = conn, CommandText = storedProcedure }; if (parameters != null) { foreach (SqlParameter param in parameters) { cmdExecuteReader.Parameters.AddWithValue(param.ParameterName, param.Value); } } if (conn.State == System.Data.ConnectionState.Closed) conn.Open(); return cmdExecuteReader.ExecuteReader(); }

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• Performance of delegate and method group

  - by BlueFox

  Hi I was investigating the performance hit of creating Cachedependency objects, so I wrote a very simple test program as follows: using System; using System.Collections.Generic; using System.Diagnostics; using System.Web.Caching; namespace Test { internal class Program { private static readonly string[] keys = new[] {"Abc"}; private static readonly int MaxIteration = 10000000; private static void Main(string[] args) { Debug.Print("first set"); test7(); test6(); test5(); test4(); test3(); test2(); Debug.Print("second set"); test2(); test3(); test4(); test5(); test6(); test7(); } private static void test2() { DateTime start = DateTime.Now; var list = new List<CacheDependency>(); for (int i = 0; i < MaxIteration; i++) { list.Add(new CacheDependency(null, keys)); } Debug.Print("test2 Time: " + (DateTime.Now - start)); } private static void test3() { DateTime start = DateTime.Now; var list = new List<Func<CacheDependency>>(); for (int i = 0; i < MaxIteration; i++) { list.Add(() => new CacheDependency(null, keys)); } Debug.Print("test3 Time: " + (DateTime.Now - start)); } private static void test4() { var p = new Program(); DateTime start = DateTime.Now; var list = new List<Func<CacheDependency>>(); for (int i = 0; i < MaxIteration; i++) { list.Add(p.GetDep); } Debug.Print("test4 Time: " + (DateTime.Now - start)); } private static void test5() { var p = new Program(); DateTime start = DateTime.Now; var list = new List<Func<CacheDependency>>(); for (int i = 0; i < MaxIteration; i++) { list.Add(() => { return p.GetDep(); }); } Debug.Print("test5 Time: " + (DateTime.Now - start)); } private static void test6() { DateTime start = DateTime.Now; var list = new List<Func<CacheDependency>>(); for (int i = 0; i < MaxIteration; i++) { list.Add(GetDepSatic); } Debug.Print("test6 Time: " + (DateTime.Now - start)); } private static void test7() { DateTime start = DateTime.Now; var list = new List<Func<CacheDependency>>(); for (int i = 0; i < MaxIteration; i++) { list.Add(() => { return GetDepSatic(); }); } Debug.Print("test7 Time: " + (DateTime.Now - start)); } private CacheDependency GetDep() { return new CacheDependency(null, keys); } private static CacheDependency GetDepSatic() { return new CacheDependency(null, keys); } } } But I can't understand why these result looks like this: first set test7 Time: 00:00:00.4840277 test6 Time: 00:00:02.2041261 test5 Time: 00:00:00.1910109 test4 Time: 00:00:03.1401796 test3 Time: 00:00:00.1820105 test2 Time: 00:00:08.5394884 second set test2 Time: 00:00:07.7324423 test3 Time: 00:00:00.1830105 test4 Time: 00:00:02.3561347 test5 Time: 00:00:00.1750100 test6 Time: 00:00:03.2941884 test7 Time: 00:00:00.1850106 In particular: 1. Why is test4 and test6 much slower than their delegate version? I also noticed that Resharper specifically has a comment on the delegate version suggesting change test5 and test7 to "Covert to method group". Which is the same as test4 and test6 but they're actually slower? 2. I don't seem a consistent performance difference when calling test4 and test6, shouldn't static calls to be always faster?

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• Detect if X is running and if it's usable for application

  - by Anders

  Hi all, On a POSIX-compliant system, how do one detect if X is running and if it's usable for the application.

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• Microsoft Speech Recognition in web service

  - by Diana

  I'm trying to use the System.Speech.Recognition namespace for recognizing speech in a web service. Actually, the WS calls a dll that uses this namespace. The problem is that...I can't. First, I had a Access denied error. After changing the Identity of my application pool to LocalSystem (security break, I know), that disappeared. But a timeout appeared. I receive no error, but no response either. I did some tests, and, the same code (very simple) that I use for recognizing the text in a WAV returns the answer in around 2 seconds, when integrated in a desktop application, but hangs and does nothing in a web application. I think I'm missing something... I'm not supposed to use System.Speech.Recognition in a web application? Am I supposed to use something else? Any help is greatly appreciated. Thank you!

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• Make a steady automata in javascript

  - by RobertWHurst

  I'm working on a javascript game and I've got an automata system controlling game time and sprite animation as well as giving a hand to the path finding system for timing and such. My problem is on slow browsers the javascript loop I'm using for counting the time is not very accurate. It tends to jump around a lot. I there a way to force the loop to run consistantly at 30 fps? The automata can drop frames if it needs to catch up so if the solution requires droping frames thats ok.

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• Parallel For Loop - Problems when adding to a List - Possible .Net Bugs

  - by Kevin Crowell

  I am having some issues involving Parallel for loops and adding to a List. The problem is, the same code may generate different output at different times. I have set up some test code below. In this code, I create a List of 10,000 int values. 1/10th of the values will be 0, 1/10th of the values will be 1, all the way up to 1/10th of the values being 9. After setting up this List, I setup a Parallel for loop that iterates through the list. If the current number is 0, I add a value to a new List. After the Parallel for loop completes, I output the size of the list. The size should always be 1,000. Most of the time, the correct answer is given. However, I have seen 3 possible incorrect outcomes occur: The size of the list is less than 1,000 An IndexOutOfRangeException occurs @ doubleList.Add(0.0); An ArgumentException occurs @ doubleList.Add(0.0); The message for the ArgumentException given was: Destination array was not long enough. Check destIndex and length, and the array's lower bounds. What could be causing the errors? Is this a .Net bug? Is there something I can do to prevent this from happening? Please try the code for yourself. If you do not get an error, try it a few times. Please also note that you probably will not see any errors using a single-core machine. using System; using System.Collections.Generic; using System.Threading.Tasks; namespace ParallelTest { class Program { static void Main(string[] args) { List<int> intList = new List<int>(); List<double> doubleList = new List<double>(); for (int i = 0; i < 250; i++) { intList.Clear(); doubleList.Clear(); for (int j = 0; j < 10000; j++) { intList.Add(j % 10); } Parallel.For(0, intList.Count, j => { if (intList[j] == 0) { doubleList.Add(0.0); } }); if (doubleList.Count != 1000) { Console.WriteLine("On iteration " + i + ": List size = " + doubleList.Count); } } Console.WriteLine("\nPress any key to exit."); Console.ReadKey(); } } }

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• C# Image saving from onPaint method

  - by cheesebunz

  Hi anyone knows how to save an image from the rectangle i created? protected override void OnPaint(PaintEventArgs e) { Bitmap bitmap = new Bitmap(@"Pictures/testing.jpg"); Image img = bitmap; int width = testing.Width / 3; int height = testing.Height / 3; Rectangle destrect = new Rectangle(0, 0, width, height); GraphicsUnit units = GraphicsUnit.Pixel; System.Drawing.Imaging.ImageAttributes imageAttr= new System.Drawing.Imaging.ImageAttributes(); //1.1.jpg// //e.Graphics.DrawImage(img,destrect,0,0, width, height, units, imageAttr); //1.2.jpg// e.Graphics.DrawImage(img, destrect, width, 0,width, height, units, imageAttr); base.OnPaint(e); } I have the desired image that is cropped but i don't know how to save .. Would greatly appreciate any help .

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• How should I measure Concurrent Licence Usage

  - by Andrew Wood

  Hi I have detailed stats on user access to my system detailing login and logout times as well as machine used, network username etc. I am in need of measuring what I would term a concurrent user licences level based on this information. Now I could take the maximum logged in for any 1 day in a 3 month period say 170 or I could take the average say 133. Does anyone have or know of a formula for working this out or is it as simple as the high water mark which is 170 in my example. A client has recently gone from an unlimited licence to a concurrent licence so I am faced with the task of setting the initial licence level. There is potential for more licence sales in the future so I don't want it set to high and I do want it based on historical data that the system collects rather than guess work.

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• NoSQL: How to retrieve a 'house' based on lat & long?

  - by Tedk

  I have a NoSQL system for storing real estate houses. One piece of information I have in my key-value store for each house is the longitude and latitude. If I wanted to retrieve all houses within a geo-lat/long box, like the SQL below: SELECT * from houses WHERE latitude IS BETWEEN xxx AND yyy AND longitude IS BETWEEN www AND zzz Question: How would I do this type of retrival with NoSQL ... using just a key-value store system? Even if I could do this with NoSQL, would it even be efficient or would simply going back to using a tradition database retrieve this type of information faster?

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