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• Tips on how to deploy C++ code to work every where

  - by User1

  I'm not talking about making portable code. This is more a question of distribution. I have a medium-sized project. It has several dependencies on common libraries (eg openssl, zlib, etc). It compiles fine on my machine and now it's time to give it to the world. Essentially build engineering at its finest. I want to make installers for Windows, Linux, MacOSX, etc. I want to make a downloadable tar ball that will make the code work with a ./configure and a make (probably via autoconf). It would be icing on the cake to have a make option that would build the installers..maybe even cross-compile so a Windows installer could be built in Linux. What is the best strategy? Where can I expect to spend the most time? Should the prime focus be autoconf or are there other tools that can help?

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• Java generics question

  - by user247866

  So I have 3 classes. Abstract class A Class B extends class A independent Class C In class D that contains the main method, I create a list of instances of class B List<B> b = methodCall(); // the method returns a list of instances of class B Now in class C I have one method that is common to both A and B, and hence I don't want to duplicate it. I want to have one method that takes as input an instance of class A, as follows: public void someMethod(List<A> a) However, when I do: C c = new C(); c.someMethod(b); I get an error that some-method is not applicable for the argument List<B>, instead it's expecting to get List<A>. Is there a good way to fix this problem? Many thanks!

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• Infinite queue for build while TFS Preview publishing on Azure Cloud Service

  - by dygo

  I've created Cloud Service and linked TFS Preview Project for CI deployments. I've chosen Manual mode for triggering the builds. The previously queued builds were successfully completed and deployed. And the website based on this Cloud Service was running fine. Waiting in the queue was no more than 3-5 seconds. Now when I click - "Queue New Build" - the new build item is created in the queue but it never runs. I can successfully Publish project onto Azure Cloud service from VS2012 though. What could be the most common reasons for this?

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• Adding nodes to a global linked-list

  - by Zack

  I am attempting to construct my first linked list, and having read a basic introduction, have done the following. Firstly, declare a linked list node as: struct errorNode { uint8 error; struct errorNode* next; }; Secondly, define the first node globally as: struct errorNode errorList = {0, NULL}; This has been done to allow each of the libraries that make up my current project to insert errors into a common list. The function to do this is: void errorListWrite(uint8 error) { struct errorNode* newNode = malloc(sizeof(struct errorNode)); newNode->error = error; newNode->next = &errorList; errorList = *newNode; } Whilst this compiles without error, it does not function as expected. I thnk the problem is with the last two statements of the list write function, but I am unsure. A hint as to what I am doing wrong would be most appreciated.

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• Python preprocessing imports

  - by FiloSottile

  I am managing a quite large python code base (2000 lines) that I want anyway to be available as a single runnable python script. So I am searching for a method or a tool to merge a development folder, made of different python files into a single running script. The thing/method I am searching for should take code split into different files, maybe with a starting __init___.py file that contains the imports and merge it into a single, big script. Much like a preprocessor. Best if a near-native way, better if I can anyway run from the dev folder. I have already checked out pypp and pypreprocessor but they don't seem to take the point. Something like a strange use of __import__() or maybe a bunch of from foo import * replaced by the preprocessor with the code? Obviously I only want to merge my directory and not common libraries.

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• How can install sqlite-ruby on linux when sqlite3 is not in /usr/local ?

  - by Charles

  I am trying to install sqlite3 and sqlite-ruby (ruby 1.8.6) on a linux box where I do not have root. I downloaded the sqlite3 source, binaries, and shared library and placed them all in a directory called sqlite3 I then try to install sqlite-ruby using gem install sqlite-ruby --with-sqlite-dir=the_path_sqlite/sqlite3 but I keep getting the error... checking for main() in -lsqlite... no checking for sqlite.h... no * extconf.rb failed * Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Provided configuration options: --with-opt-dir --without-opt-dir --with-opt-include --without-opt-include=${opt-dir}/include --with-opt-lib --without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/data/scratch/bettbra/common/packages/ruby-1.8.6/bin/ruby --with-sqlite-dir --with-sqlite-include --without-sqlite-include=${sqlite-dir}/include --with-sqlite-lib --without-sqlite-lib=${sqlite-dir}/lib --with-sqlitelib --without-sqlitelib

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• C#.NET: FTP Several Files

  - by Steve Kiss

  Hi, I have what would seem like a common problem, but I cannot find an appropriate solution on any forums. I need to FTP an entire directory structure using .NET. I have found several code examples all of which show how you can FTP a single file by creating an FtpWebRequest object. Unfortunately, there is no information on how to deal with several files. Do I simply create a FtpWebRequest object for every single file? Any help would be appreciated. Thanks

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• Grails design for domain class initialization from static data

  - by Allison Eer

  I have some data, stateNames, to instantiate an instance of the object Country. Right now, I will only have one Country but stateNames for each country should be different. What is the best way to instantiate the instance of Country with my data? I am new to grails and would appreciate any "best practices" or common designs. One solution I can think of is to use BootStrap to save the unitedStates instance of Country to the database. What are the cons of this approach? Another solution would be to save the data in a file (in xml?) under web-app folder. If I did this approach, should the unitedStates instance of Country be instantiated by a controller?

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• Call a statement from resultMap->result iBatis

  - by Vinay

  Hi All, Please tell me is it correct configuration in given below. If there are mistake please reply. select * from PAYMENT where ORDER_ID = #ordId# and CUST_ID = #ordCustId# select * from PRODORDER where ord_id = #value# I am getting exceptions - com.ibatis.common.jdbc.exception.NestedSQLException: --- The error occurred in conf/sql-map.xml. --- The error occurred while applying a result map. --- Check the employee.orderResult. --- Check the result mapping for the 'payments' property. --- Cause: com.ibatis.sqlmap.client.SqlMapException: There is no statement named getOrderPayments in this SqlMap.

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• Is Amazon SQS the right choice here? Rails performance issue.

  - by ole_berlin

  I'm close to releasing a rails app with the common networking features (messaging, wall, etc.). I want to use some kind of background processing (most likely Bj) for off-loading tasks from the request/response cycle. This would happen when users invite friends via email to join and for email notifications. I'm not sure if I should just drop these invites and notifications in my Database, using a model and then just process it with a worker process every x minutes or if I should go for Amazon SQS, storing the messages and invites there and let my worker retrieve it from Amazon SQS for processing (sending the invites / notifications). The Amazon approach would get load off my Database but I guess it is slower to retrieve messages from there. What do you think?

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• How do C or .NET programmers store and load strings in their programs?

  - by Ivan Ivkovic

  I've been doing PHP and stuff for the last year; I just got into a bit of C and C++. In the book I'm just reading, all the strings are actually in the code (I realize this is just for example, but just curious). My interest is — is there a common way for programmers to store strings and display them? Does .NET have some predefined way of doing this — like Android does in strings file? (In PHP, I keep them in all CSV files completely separate from code.)

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• How can the number of modifications be changed in the TeamCity success email?

  - by Jason Slocomb

  I would like to list an arbitrary number of changes rather than the default 10 that are listed now. We have a dev build on checkin where this isn't necessary, but the once daily build that goes out I would like to have all the changes listed for the day. If that is unpossible (range?) than the last n would be fine. I've looked in the .ftl files, specifically common.ftl. It contains the macro for using data from jetbrains.buildServer.notification.impl.ChangesBean to acquire the changes. I am hopeful there is a way to set properties externally that ChangesBean will look at, but I haven't been able to discover anything. Ideas?

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• Uploading a file to AppEngine using GWT: How to provide feedback to the user?

  - by jcdmb

  Hello everyone, I have a GWT-FormPanel on my website, where people can upload pictures and answer some questions. It's working very well. The only problem is: I would like to provide a feedback to the user (for example: 0% to 100%) during the actual file process. But I have no idea how I can do that. I think that's a very common issue, that's why I would like to ask you guys if you know any tutorial or example that could help me to solve this problem. I've already tried GWT-Upload, but it does not do what I want: I have a submit button at the end of the FormPanel and the GWTUpload has it's own "SEND" button, which I don't want to have. Thanks in advance for helping and merry Christmas!

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• JavaScript Library Design

  - by JSMan2034

  I have a general question about the design of JavaScript Libraries. I am trying to consolidate common methods into one js file so they can be reused by different scripts. I have taken a look at how the JSON library is structured and believe it was a good approach. JSON for Javascript. So they start off creating an instance of the class: if (!this.JSON) { this.JSON = {}; } Then they do this: (function () { if (typeof JSON.stringify !== 'function') { JSON.stringify = function (value, replacer, space) { This is works perfect if you just want to do JSON.[function_name], but what if I want to have a more structured library such that I want: JSON.[subgroup].[function]. How would I structure my JS library in such a way? Any links to resources are greatly appreciated, thanks.

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• Pattern or recommneded refactoring for method

  - by iKode

  I've written a method that looks like this: public TimeSlotList processTimeSlots (DateTime startDT, DateTime endDT, string bookingType, IList<Booking> normalBookings, GCalBookings GCalBookings, List<DateTime> otherApiBookings) { { ..... common process code ...... while (utcTimeSlotStart < endDT) { if (bookingType == "x") { //process normal bookings using IList<Booking> normalBookings } else if (bookingType == "y") { //process google call bookings using GCalBookings GCalBookings } else if (bookingType == "z" { //process other apibookings using List<DateTime> otherApiBookings } } } So I'm calling this from 3 different places, each time passing a different booking type, and each case passing the bookings I'm interested in processing, as well as 2 empty objects that aren't used for this booking type. I'm not able to get bookings all into the same datatype, which would make this easier and each booking type needs to be processed differently, so I'm not sure how I can improve this. Any ideas?

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• Searching for the right pattern to handle login data

  - by stevebot

  Hi all, I'm working on a controller that handles logins for a Web app. These logins will come from multiple clients but will all contain the same data. However, depending on the client, this data will be interpreted into common entities for our webapp differently. For instance, we have a user code that gets sent in, and in one case we may use the first four digits of the code, and in another case 12 digits of the code to map to a field on a User entity. Instead of handling this all in the controller and having big nasty if blocks of logic, I would like to use a pattern to handle how this information gets ingested into our application. What are your opinions?

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• DNS Lookup in ASP.Net

  - by Dave Forgac

  I have a Windows server that is intermittently losing the ability to lookup DNS information. I'm trying to get to the root cause of the problem but in the mean time I'd like to be able to monitor whether the server can perform lookups. Basically, it should attempt to lookup some common hostnames and the display 'Success' if the lookups are successful. I see lots of examples of doing this with third party components in ASP.NET but I would prefer to be able to do this with a single ASP.Net script that would be portable and not require anything additional be installed.

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• Impersonating a user in wrong domain doesn't throw exception

  - by Rita

  I've used the common impersonation code and it worked just fine, until I inserted random 'dggdgsdg' in domain - and it worked nonetheless... if (LogonUser(Username, Domain, Password, Logon32LogonInteractive, Logon32ProviderDefault, ref existingTokenHandle) && DuplicateToken(existingTokenHandle, (int)SecurityImpersonationLevel.SecurityDelegation, ref duplicateTokenHandle)) { Identity = new WindowsIdentity(duplicateTokenHandle); ImpersonationContext = Identity.Impersonate(); } else { throw new Win32Exception(Marshal.GetLastWin32Error()); } I used some TestUser on my domain, and it worked. I then switched domain, to random nonsense 'werwerhrg', and it impersonated the TestUser on my domain! Why? I would expect an exception to be thrown, why on earth is it working?

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• Can I change the database server and database a report is pointing to dynamically?

  - by Randy Minder

  I have a Crystal 2008 report that will be deployed to an InfoView server. There are four different databases the user might want to execute the report against. Each of the four databases have exactly the same schema. Only the data in each is different. Each database corresponds to a plant we have around the world. Instead of creating four different reports (each one connected to one of the four databases), am I able to dynamically change the server/database the report hits based on a value the user enters into a parameter? I'm really trying to avoid having to create four identical reports except for the database connection on each. If this isn't possible, how do developers typically deal with this sort of scenario? I would imagine it's fairly common. Thanks very much.

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• SQL Server 2008 EF 4 - limiting database records returned using permissions?

  - by Chuck

  In our database all tables are linked back to a single table. This table has a bit column to limit whether the record is displayed. Currently the records are filtered on the code side of the website. Is there any way to set up permission so that userA would never see any record in the database where that common bit column was set to true? We are using SQL Server 2008. Alternatively we are also using entity framework 4.0 in .net 4 (in c#) if you have any ideas how it might be accomplished there? Thanks for your feedback.

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• Emacs with CEDET changes copy/paste to include trailing spaces?

  - by Paul D.

  I just started trying out CEDET today, which I really like, but it seems to do something completely worthless with respect to copying/pasting. If I highlight some stuff and copy it, when it gets pasted back the newlines are eliminated and there is just a ton of trailing whitespace on each line. This is really worthless. All I have in my .emacs right now for CEDET is the following: (load-file "~/.emacs.d/cedet-1.0pre7/common/cedet.el") (require 'semantic-ia) (require 'semantic-gcc) (semantic-load-enable-code-helpers) Does anybody know how to turn this off? I can't find anything about this except that the CEDET main page says it has "magic copy & paste".

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• 'is instanceof' Interface bad design

  - by peterRit

  Say I have a class A class A { Z source; } Now, the context tells me that 'Z' can be an instance of different classes (say, B and C) which doesn't share any common class in their inheritance tree. I guess the naive approach is to make 'Z' an Interface class, and make classes B and C implement it. But something still doesn't convince me because every time an instance of class A is used, I need to know the type of 'source'. So all finishes in multiple 'ifs' making 'is instanceof' which doesn't sound quite nice. Maybe in the future some other class implements Z, and having hardcoded 'ifs' of this type definitely could break something. The escence of the problem is that I cannot resolve the issue by adding functions to Z, because the work done in each instance type of Z is different. I hope someone can give me and advice, maybe about some useful design pattern. Thanks

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• How does C++ free the memory when a constructor throws an exception and a custom new is used

  - by Joshua

  I see the following constructs: new X will free the memory if X constructor throws. operator new() can be overloaded. The canonical definition of an operator new overload is void *operator new(heap h) and the corrisponding operator delete. The most common operator new overload is pacement new, which is void *operator new(void *p) { return p; } You almost always cannot call delete on the pointer given to placement new. This leads to a single question. How is memory cleaned up when X constructor throws and an overloaded new is used?

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• How to Execute Page_Load() in Page's Base Class?

  - by DaveDev

  I have the following PerformanceFactsheet.aspx.cs page class public partial class PerformanceFactsheet : FactsheetBase { protected void Page_Load(object sender, EventArgs e) { // do stuff with the data extracted in FactsheetBase divPerformance.Controls.Add(this.Data); } } where FactsheetBase is defined as public class FactsheetBase : System.Web.UI.Page { public MyPageData Data { get; set; } protected void Page_Load(object sender, EventArgs e) { // get data that's common to all implementors of FactsheetBase // and store the values in FactsheetBase's properties this.Data = ExtractPageData(Request.QueryString["data"]); } } The problem is that FactsheetBase's Page_Load is not executing. Can anyone tell me what I'm doing wrong? Is there a better way to get the result I'm after? Thanks

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• Using Remote Web Server to Initialize iPhone App

  - by Chris_K

  My iPhone app relies on a vendor's XML feed to provide data. But that feed is not locked down. The vendor could change the format of the XML at any time, although so far they've promised not to. Since I might want to tell my app to use a different URL for its data source, I'd like to set up a single "Command Central" Web page, on my own server, to direct the app to the correct data source. In other words, each time my app starts, in the background and unseen by the user, it would visit "http://www.myserver.com/iphoneapp_data_sources.xml" to retrieve the URL for retrieving data from my vendor. That way, if my vendor suddenly changes the exact URL or the XML feed that the app needs, I can update that Web page and ensure that all installations of the app are using the correct XML feed. Does anyone have any advice or examples showing this kind of approach? It seems as if this must be a common problem, but so far I haven't found a well-established design pattern that fits it.

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