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• What technology to use for a RIA

  - by user297159

  I have to develop a online business software solution (similar to ERP) for a company to manage the information exchange for internal use and with external partners. It should be online. What technology should I use, I have checked framewroks like: Flex, Silverlight, Google/GWT, sencha (ExtJS), jQuery, DoJo, Telereik, Infrajistics and others similar. But they seam to be very low level programming. May be this is advantage for other projects, where you need more flexibility, but this project is stright forward. I need something more focused on business software (tables, forms, processes) where and eventually more efficient with less coding, or something I can save time. Is force.com an option? But I can not install this on the customer's servers... Do you have any ideas for me for a web based framework focused on business applications?

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• What is the time taken by java to call a method in another package?

  - by satish

  I have an assignment where i need to do feasibility study on two of my approaches and find optimized one. There are two packages A and B User input is gathered in A and then sent to B for execution. Now my approaches are 1. Call B methods from package A one by one. 2. Create a common method in B and send all the input as parameters. Which is feasible and best one, I know 2 is good in terms of code optimization and less number of calls. But, I want to understand what will be the execution time difference in above approaches How much time does java take to call method in another package? Is there any default value like x nano seconds or y milli seconds. Based on the time taken I can choose the appropiate one. Thanks

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• Linq To SQL: Retain list order when using .Contains

  - by rockinthesixstring

  I'm using Lucene.net to build a MyListOfIds As List(Of Integer) which I then pass on to my Linq service. I then search the database as follows Return _EventRepository.Read().Where(Function(e) MyListOfIds.Contains(e.ID)).ToList Now I know that Lucene is already ordering MyListOfIds based on the weight it gave each term. What sucks is that Linq is losing that order in it's SQL search. My Question: How can I retain that sort order when building my Lambda expression? I tried using LINQPad to see how the query is being built, but because I had to declare a variable LINQPad didn't show me the resultant SQL :-( Here's what I tried in LINQPad Dim i As New List(Of Integer) i.Add(1) i.Add(100) i.Add(15) i.Add(3) i.Add(123) Dim r = (From e In Events Where i.Contains(e.ID) Select e) note: my example is in VB.NET, but I don't mind if responses are in C#

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• Stored Procedure or calculations via IQueryable?

  - by Shawn Mclean

  This is a question that is based on choosing performance over design practices. If I have a method that will be executed many times a second; public static IQueryable<IPerson> InRadius(this IQueryable<IPerson> query, Coordinate center, double radius) { return (from u in query where CallHeavyMathFormula(u, center, radius) select u); } This extension method for IQueryable generates a SQL that does some heavy maths calculation (Cosine, Sine, etc). This would mean the application sends 1-2KB of sql to the server per call. I've heard of placing all application logic, in your application. I also would like to change to a database such as azure or one of those scalable databases in the future. How do I handle something like this? Should I leave it as it is now or write stored procedures? How do applications like twitter or facebook do it?

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• SQLITE (C/C++interface) - How to commit a transaction

  - by AJ

  I am using sqlite c/c++ interface. Now here is my scenario - I have 3 tables (related tables) say A, B, C. Now, there is a function called Set, which get some inputs and based on the inputs inserts rows into these three tables. (sometimes it can be an update in one of the tables) Now I need two things. One, i dont want autocommit feature. Basically I would like to commit after every 1000 calls to Set function Secondly, within the set function itself, if i find that after inserting into two tables, the third insert fails, then i have to revert, those particular changes in that Set function call. Now i dont see any sqlite3_commit function exposed. I only see a function called sqlite3_commit_hook() which is slightly diff in documentation. Are there any function exposed for this purpose? or What is the way to achieve this behaviour? Can you help me with the best approach of doing this. Regards, Arjun

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• Passing arguments from loading activity to main activity

  - by ZelluX

  I'm writing an application that starts with a loading activity. In the loading activity the app requests html from web and parses the html, then it sends the parsing result to the main activity. The main activity has several tabs, and contents of these tabs are based on the result of parsing. For example, the result of parsing is a list of strings ["apple", "banana", "orange"], and I need to pass this list to main activity, so that the main activity can create three tabs named after three fruits. I would like to know if there is any way to pass a list of strings among activities, BTW, is it the common way of do this? Many thanks.

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• How to make dropdownlist show a selected value in asp.net mvc?

  - by Pandiya Chendur

  I have an edit page with a Html.DropDownList in it....I cant show the dropdownlist value it always shows up with Select instead i want to make the dropdown show an item as selected based on a model value say Model.Mes_Id... Any suggestion how it can be done... <p> <label for="MeasurementTypeId">MeasurementType:</label> <%= Html.DropDownList("MeasurementType", // what should i give here?)%> <%= Html.ValidationMessage("MeasurementTypeId", "*") %> </p> EDIT: It has the list items but i want to show a value selected in the edit view... public ActionResult Edit(int id) { var mesurementTypes = consRepository.FindAllMeasurements(); ViewData["MeasurementType"] = mesurementTypes; var material = consRepository.GetMaterial(id); return View("Edit", material); }

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• how to access jquery internal data?

  - by Unknown

  As you may or may not be aware as of jQuery 1.7 the whole event system was rewritten from the ground up. The codebase is much faster and with the new .on() method there is a lot of uniformity to wiring up event handlers. One used to be able to access the internal events data and investiate what events are registered on any given element, but recently this internal information has been hidden based on the following scenario... It seems that the "private" data is ALWAYS stored on the .data(jQuery.expando) - For "objects" where the deletion of the object should also delete its caches this makes some sense. In the realm of nodes however, I think we should store these "private" members in a separate (private) cache so that they don't pollute the object returned by $.fn.data()" Although I agree with the above change to hide the internal data, I have found having access to this information can be helpful for debugging and unit testing. What was the new way of getting the internal jquery event object in jQuery 1.7?

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• Determining the order of a list of numbers (possibly without sorting)

  - by Victor Liu

  I have an array of unique integers (e.g. val[i]), in arbitrary order, and I would like to populate another array (ord[i]) with the the sorted indexes of the integers. In other words, val[ord[i]] is in sorted order for increasing i. Right now, I just fill in ord with 0, ..., N, then sort it based on the value array, but I am wondering if we can be more efficient about it since ord is not populated to begin with. This is more of a question out of curiousity; I don't really care about the extra overhead from having to prepopulate a list and then sort it (it's small, I use insertion sort). This may be a silly question with an obvious answer, but I couldn't find anything online.

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• the breakpoint will not currently be hit no symbols loaded

  - by Carlos_Liu

  I want to debug on the customer's machine (Windows Server 2003) to track a problem, and out product is based on .NET 2.0. I want to use DbgCLR.exe to debug a file AAA.dll, what I did is: install .NET 2.0 SDK on the customer's machine (to get the DbgCLR.exe) copy the symbol file AAA.pdb to the same directory with AAA.dll get the source file for AAA.dll the AAA.dll will be loaded by w3wp.exe, so in the DbgCLR Tools-Attach to Process, then I choose w3wp.exe File-Open-File open the source file and add a breakpoint in the function which will be callled but the breakpoint seems do no work because there is an warning icon on it and says : the breakpoint will not currently be hit. No symbols have been loaded for this document. On my computer (Windows XP) which has the debug version of whole source code, I did nearly the same thing as above but the different is: I attached aspnet_wp.exe to do the debug and it works What should I do to let it work on the customer's machine?

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• Android - Can display a single Activity using two layout.xml files?

  - by Avadhani

  I had developed Android app having some screens with common UI format. The format in top-down approach is: Title Header (Two buttons, ImageView) Content Area- It will differ among Activities (contains ListView, Tabs, Buttons, TextView, WebView....) Footer Layout (Relative Layout with three Imagebuttons) I want to reformat the code in such a way that one xml contains Title Header and Footer Layout and other xml contains ListView,Tabs, Buttons.. based on the usage. Can i acheive this? Please help me with sample code/links....

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• Structuremap and creating objects with initial state

  - by Simon

  I have an object which needs a dependency injected into it public class FootballLadder { public FootballLadder(IMatchRepository matchRepository, int round) { // set initial state this.matchRepo = matchRepository; this.round = round; } public IEnumerable<LadderEntry> GetLadderEntries() { // calculate the ladder based on matches retrieved from the match repository // return the calculated ladder } private IMatchRepository matchRepo; private int round; } For arguments sake, lets assume that I can't pass the round parameter into the GetLadderEntries call itself. Using StructureMap, how can I inject the dependency on the IMatchRepository and set the initial state? Or is this one of those cases where struggling against the framework is a sign the code should be refactored?

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• How to update many databases when we update any tablw

  - by Lalit Kandpal

  I am creating a C# window application which is based on a medical inventory.In this application I have mainly three forms as PurchaseDetail,SalesDetail,and StockDetail. Now I want a functionality in which if i insert or modify the records in PurchaseDetail,or SalesDetail the Data in the StockDetail should also be modified.(for example if i insert some quantity of medicines in PurchaseDetail then Quantity In StockDetail should also modified and same as for SalesDetail ) Columns in PurchaseDetail: Id(Primary Key and auto increment int),BatchNumber,MedicineName,ManufacturingDate,ExpiryDate,Rate,MRP,Tax,Discount,Quantity Columns in SalesDetail: Id(PrimaryKey and auto increment int),BillNumber,CustomerName,BatchNumber,Quantity,Rate,SalesDate Columns in StockDetail: Id(Primary Key and auto increment int),ProductId,ProductName,OpeningStock,ClosingStock,PurchaseQty,DispenseQty,PurchaseReturn,DispenseReturn Please Help me.

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• Solution for distributing MANY simple network tasks?

  - by EmpireJones

  I would like to create some sort of a distributed setup for running a ton of small/simple REST web queries in a production environment. For each 5-10 related queries which are executed from a node, I will generate a very small amount of derived data, which will need to be stored in a standard relational database (such as PostgreSQL). What platforms are built for this type of problem set? The nature, data sizes, and quantities seem to contradict the mindset of Hadoop. There are also more grid based architectures such as Condor and Sun Grid Engine, which I have seen mentioned. I'm not sure if these platforms have any recovery from errors though (checking if a job succeeds). What I would really like is a FIFO type queue that I could add jobs to, with the end result of my database getting updated. Any suggestions on the best tool for the job?

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• Strange difference between optimized/non optimized microsoft c++ code

  - by Anders Forsgren

  I have a c++ program with a method that looks something like this: int myMethod(int* arr1, int* arr2, int* index) { arr1--; arr2--; int val = arr1[*index]; int val2 = arr2[val]; doMoreThings(val); } With optimizations enabled (/O2) the first line where the first pointer is decremented is not executed. I assume the compiler believes that the arr1 array is not used since it thinks it can remove the decrement. Am I violating some convention in the above code? What could cause this behavior? It is a very old piece of f2c-translated code, the pointer decrement is due to the 1-based indexing of the original code.

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• What are the main reasons against the Windows Registry?

  - by dbemerlin

  If i want to develop a registry-like System for Linux, which Windows Registry design failures should i avoid? Which features would be absolutely necessary? What are the main concerns (security, ease-of-configuration, ...)? I think the Windows Registry was not a bad idea, just the implementation didn't fullfill the promises. A common place for configurations including for example apache config, database config or mail server config wouldn't be a bad idea and might improve maintainability, especially if it has options for (protected) remote access. I once worked on a kernel based solution but stopped because others said that registries are useless (because the windows registry is)... what do you think?

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• implementing security with session variables, how it is insecure

  - by haansi

  I am doing web based projects in dotnet. Currently I am implementing security using session variables. I keep current user id and user type in session and authenticate user from these session variables (say Session["UserId"],Session["UserName"] and Session["UserType"]). Please help me understand how this could be insecure. I've heard that such security can be broken and applications can be hacked very easily, like it is possible to get session id and directly connect to that session id etc. Please guide me on this.

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• What Can A 'TreeDict' (Or Treemap) Be Used For In Practice?

  - by Seun Osewa

  I'm developing a 'TreeDict' class in Python. This is a basically a dict that allows you to retrieve its key-value pairs in sorted order, just like the Treemap collection class in Java. I've implemented some functionality based on the way unique indexes in relational databases can be used, e.g. functions to let you retrieve values corresponding to a range of keys, keys greater than, less than or equal to a particular value in sorted order, strings or tuples that have a specific prefix in sorted order, etc. Unfortunately, I can't think of any real life problem that will require a class like this. I suspect that the reason we don't have sorted dicts in Python is that in practice they aren't required often enough to be worth it, but I want to be proved wrong. Can you think of any specific applications of a 'TreeDict'? Any real life problem that would be best solved by this data structure? I just want to know for sure whether this is worth it.

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• get data from to tables !

  - by mehdi

  i want to sort my users based on most viewed profile in my user list . i have these two tables but i don't know how to right correct query to make this happen . i used grouping like this : $sql ="select userid , count(*) form profile_visit group by userid " ; but it's not make sense to me , i don't think this query will help me at all . +-----------+---------------+------+-----+-------------------+----------------+ | Field | Type | Null | Key | Default | Extra | +-----------+---------------+------+-----+-------------------+----------------+ | userid | int(11) | NO | PRI | NULL | auto_increment | | username | varchar(128) | NO | | NULL | | | password | char(40) | NO | | NULL | | | email | varchar(128) | NO | | NULL | | | name | varchar(256) | NO | | NULL | | | lastname | varchar(256) | NO | | NULL | | | job | varchar(256) | NO | | NULL | | | birthdate | varchar(100) | NO | | NULL | | | address | varchar(1024) | NO | | NULL | | | website | varchar(100) | NO | | NULL | | | tel | varchar(100) | NO | | NULL | | | role | tinyint(1) | NO | | 0 | | | reg_date | timestamp | NO | | CURRENT_TIMESTAMP | | +-----------+---------------+------+-----+-------------------+----------------+ and profile_visit table like this +------------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +------------+-------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | ip_address | varchar(70) | NO | | NULL | | | userid | int(11) | NO | | NULL | | +------------+-------------+------+-----+---------+----------------+

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• Large Video Uploads via a website

  - by Andrew

  Some of the problems that can happen are timeouts, disconnections, and not being able to resume a file and having to start from the beginning. Assuming these files are up to around 5gigs in size, what is the best solution for dealing with this problem? I'm using a Drupal 6 install for the website. Some of my constraints due to the server setup I have to deal with: Shared hosting with max 200 connections at a time (unlimited disk space) Shared hosting. Unable to create users through an API (so can't automatically generate ftp accounts) I do have the ability to run cron-type scripts via a Drupal module. My initial thought was to create ftp users based off of Drupal accounts and requiring them to download an ftp client for their OS of choice. But the lack of API to auto-create ftp accounts and the inability to do it from command line kind of hinder that solution. If there's a workaround someone can think of, let me know! Thanks

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• When loading shopping cart in Magento with a new Payment module, I get an error I haven't been able

  - by Joseph

  I am trying to add a new payment module into Magento. However, even after commenting out the vast majority of the code, I still get the following error: Fatal error: Call to a member function isAvailable() on a non-object in /var/www/html/app/code/core/Mage/Payment/Helper/Data.php on line 71 I am using Magento 1.4.0.1, and have disabled the cache. I even emptied the cache several times just in case. The only code currently not commented out is based on the tutorials here and here. The error occurs when the cart is loaded either from the administration area or the front end. Is there anyone out there that has run into a similar issue? I would post code, but I am not sure what needs to be posted. Thanks for the assistance.

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• External html, for headers/navs?

  - by J2

  Hey all, looking to see if theres a way to easily include external html file inside the body to repeat on every page, for instance: a navigator or something. Basically if i have to add a menu item or something, i have to go and paste all the code into each page. Or even a way to section parts off in Dreamweaver to update based on a file or something would work i suppose Ive done it before through JavaScript with document.writes and stuff, but it was very annoying, and probably a terrible way to go about doing so. thanks for your help!

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• How can I implement "real time" messaging on Google AppEngine?

  - by Freed

  I'm creating a web application on Google AppEngine where I want the user to be notified a quickly as possible after certain events occour. The problem is similar to say a chat server in that I need something happening on one connection (someone is writing a message in a chat room) to propagate to a number of other connections (other people in that chat room gets the message). To get speedy updates from the server to the client I'm planning on using long polling with XmlHttpRequest, hoping that AppEngine won't interfere other than possibly restriing the timeout. The real problem however is efficient notification between connections on AppEngine. Is there any support for this type of cross connection notification on AppEngine that does not involve busy-waiting? The only tools I can think of to do this at all is either using the data storage (slow) or memcache (unreliable), and none of them would let me avoid busy-waiting. Note: I know about XMPP support on AppEngine. It's related, but I want a browser based solution, sending messages to the users by XMPP is not an option.

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• Zend + Wamp = Cant use curl/fput for a url locally

  - by bluedaniel

  Ive got a page in Zend all set up that will for now just echo "Hello", this address is at http://dev.local/hello and works when visiting in the browser. However when I try to use curl or file_get_contents from a script in my zend 'public' folder I get a 500 Internal error message. UPDATE Its failing because my application tries to set the langauge based on the browsers default language, when using headers like I have below, how do I add this locale? "User-Agent: XXXXXXX/2.0\r\n" . "Accept: */*\r\n" . "Accept-Charset: utf-8;\r\n" .

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• Java List Sorting: Is there a way to keep a list permantly sorted automatically like TreeMap?

  - by david

  In Java you can build up an ArrayList with items and then call: Collections.sort(list, comparator); Is there anyway to pass in the Comparator at the time of List creation like you can do with TreeMap? The goal is to be able add an element to the list and instead of having it automatically appended to the end of the list, the list would keep itself sorted based on the Comparator and insert the new element at the index determined by the Comparator. So basically the list might have to re-sort upon every new element added. Is there anyway to achieve this in this way with the Comparator or by some other similar means? Thanks.

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