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• How to make a staging table in ms sql 2005?

  - by chobo2

  Hi I heard about doing staging tables and I am wondering how you actually do it. I want to do a sqlbulk copy into a staging table. Then then update the real table. I heard in mssql 2008 that you can use something called merge but I am using ms sql 2005 so I heard I have to use a update inner join? I am not sure how that would look like(I am guessing best way would be to write it in SP). Also the staging table needs to be able to handle concurrent updates. I was thinking of putting another column in the staged as GUID so that way I know which records belong to which group and when it is time to delete the records from the staged table I can just use that. So can anyone show me any examples or tutorials on how to do it? Also how fast is this way? Say if your updating 50,000 records how long would that take(a guesstimate is fine)

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• php vs python django or something else for CMS module

  - by Michael

  We're looking to develop a CMS module for our website and I need some help in choosing the language/framework for this project. Basically we need to develop a "help' module like this one from ebay http://pages.ebay.com/help/index.html which will contain a lot of static pages with nice URLs for SEO. The application must run fast using low computer resources. We have been looking to use php on a custom made mvc framework but we received advice from other sources that py/django is the exactly language/framework that we need in terms of maintainability and development speed because it was developed for exactly this kind of projects so I need an expert advice on this matter with pro and cons for each choice.

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• Distribution of many small classes

  - by Moo-Juice

  Hi All, I have a base class called EventArgs. Derived from this are many, many specializations that represent event arguments for a particular kind of event. Consumers of these events may need some, many, or very few of these argument classes. My question is, would you provide a header file for each type (e.g, 50+ header files for the varying ones), would you try to group them in to families and have a 'common' header file for those, or would you throw caution to the window and throw them in to one easy-of-use header file that can just be included? Another approach might be to have 50 header files, and then I could introduce some "family" header files that included particular ones. Not sure about the naming conventions for these kinds of things so it is obvious what is where. I know there may not be a hard and fast rule, but wondering what other developers have done when they find themselves writing many little classes. Thanks in advance.

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• question on reverse array

  - by davit-datuashvili

  we know algorithm how reverse array of n integers for (int i=0;i<n/2;i++){ swap(a[i],a[n-1-i]): } is this method better according the speed of algorithm or not because swap using xor is more fast then in other method here is code public class swap { public static void main(String[]args){ int a[]=new int[]{2,4,5,7,8,11,13,12,14,24}; System.out.println(" array at the begining:"); for (int i=0;i<a.length;i++){ System.out.println(a[i]); } for (int j=0;j<a.length/2;j++){ a[j]^=a[a.length-1-j]; a[a.length-1-j]^=a[j]; a[j]^=a[a.length-1-j]; } System.out.println("reversed array:"); for (int j=0;j<a.length;j++){ System.out.println(a[j]); } } } Result: array at the begining: 2 4 5 7 8 11 13 12 14 24 reversed array: 24 14 12 13 11 8 7 5 4 2

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• How can i add Active Directory security groups to a SharePoint site to control permissions, rather than individual user accounts

  - by user574811

  SharePoint does integrate active directory accounts, of course, but how about security groups? Have a few sites where I'm fairly confident access is going through an existing Active Directory (AD) security groups (i.e. only an AD security group has been granted permissions through the 'People and Groups') In another situation, where I created the AD group and granted it permissions to a site, the customers were not able to access immediately. Eventually had to fast-track it and add the individuals to the People and Groups to keep the project going, but hoping not to have to maintain it that way. Any specific requirements of the security group in AD? Universal, Global, or domain local? Is there any time delay between modifying group members in AD and having that take effect in SharePoint?

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• Best neural network for certain type of pattern analysis?

  - by fred basset

  Hi All, I'm working on a system that will send telemetry data on machine operation back to a central server for analysis. One of the machine parameters we're measuring is motor current drawn vs time. After an operation is finished we plan to send back an array of currents vs time to the server. A successful operation would have a pattern like a trapezoid, problematic operations would have a pattern completely different, more like a large spike in values. Can anyone recommend a type of neural network that would be good at classifying these 1D vectors of current values into a pass/fail type output? Thanks, Fred

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• Shift from Java to c++

  - by zengr

  Hello, I have been developing applications based on C# (.net) and Java (J2EE) from the last 3 years. But, now I feel, Java, C# makes you lame (from learning point of view) and you can develop your apps quickly but you fail to understand the basic underlying concepts of programming. So, I am trying to learn C++, but I find it a little "confusing" due to pointer, multiple inheritance, some conventions and other concepts of C++ which don't exist in Java. So, what do you guys suggest? How should I got about it? Thanks PS: I am a student, so have all the time in the world and actually shift.

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• Dispatcher.CheckAccess() isn't working from my console application, is there a better way.

  - by zimmer62

  I wrote an application in WPF / VB and separated the business logic and UI into different projects. The business layer uses a serial port which runs on a different thread, Now that I'm trying to write a command line interface for the same business layer, it seems to fail when .Invoke() is called. (no error, just doesn't work) I'm pretty sure the reason I had to add in checkaccess and .invoke was because I have collections that would be changed during processing the serial port data and wanted the NotifyCollectionChanged to be handled by WPF data binding. (The reason I'm not 100% sure is because it was months ago I wrote that part and it all worked great from the GUI, now adding the console app has made me rethink some of this) I would like my business layer to run these processes on the thread they were created, I need this to work from both my GUI version and the command line version. Am I misusing the Dispatcher in my business layer? Is there a better way to handle an event from the serial port, and then return to the main thread to processes the data?

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• slide navigation

  - by robosot

  I'm trying to make slide navigation. Here is my code html <li> <a href="#">Services</a> <div class="subcategories"> <a href="#">Cleaning</a> </div> </li> The subcategories div is hidden. js $('li a').hover(function() { $(this).next().slideToggle('fast', function() { }); }); This code works. The problem is that when the mouse goes out of the li a the subcategories div disappears. What i want is that when the user point the li a the subcategories div to be shown so the user be able to click on some link of the sub navigation.

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• which is the cleaner way to do this simple while?

  - by user363834

  I'm learning c++ and I want to make clean and readable code and I was wondering which way is better (while is supposed to make the factorial of 9) : 1 - int main(){ int i = 1,r = i; while (i < 10) { r *= ++i; } 2 - int main(){ int i = 1,r = i; while (i < 10) { i++ r *= i } 1 may be harder to understand but it's 1 less line, is it worth it? and what about performance. Obviously it wouldn't matter in such a trivial example but it would be a good practice to make fast code from the begining.

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• Any efficient way to read datas from large binary file?

  - by limi

  Hi, I need to handle tens of Gigabytes data in one binary file. Each record in the data file is variable length. So the file is like: <len1><data1><len2><data2>..........<lenN><dataN> The data contains integer, pointer, double value and so on. I found python can not even handle this situation. There is no problem if I read the whole file in memory. It's fast. But it seems the struct package is not good at performance. It almost stuck on unpack the bytes. Any help is appreciated. Thanks.

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• increasing speed and efficiency of ajax call

  - by user1048824

  I'm not the most disciplined dev, dont know standards and am self-taught so bear with me. I create stuff very logically and fast but not always using 'programming standards'. I have a mobile app using geolocation API. it gets thousands of places from my db and makes gmaps v3 markers for the ones around the user's current location. there is an ajax call from my JS to an aspx page that calls the database, makes a json string, and sends the json string to the javascript that then creates the google map markers. would i save time if the json string was in a flat file? im not sure if, generally speaking, accessing a sql db from an aspx page is faster than c# file i/o on a flat file with pre-rendered JSON. (of course, using the flat file, it would update everytime the db is updated)

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• Standardize word macro usage within the team

  - by user138010

  Hi, I have a team of 10 persons who work on word documents, they format them as per our defined guidlines. To complete the work fast we have created a macro that has been updated on all the machines. This macro corrects the font, size and formatting. How can I ensure and implement that nobody can change/replace or delete this macro from their system? In case this happens I should get an alert. Can something be done at the system or programme level? Thanks, PK

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• What is most efficient way of setting row to zeros for a sparce scipy matrix?

  - by Alex Reinking

  I'm trying to convert the following MATLAB code to Python and am having trouble finding a solution that works in any reasonable amount of time. M = diag(sum(a)) - a; where = vertcat(in, out); M(where,:) = 0; M(where,where) = 1; Here, a is a sparse matrix and where is a vector (as are in/out). The solution I have using Python is: M = scipy.sparse.diags([degs], [0]) - A where = numpy.hstack((inVs, outVs)).astype(int) M = scipy.sparse.lil_matrix(M) M[where, :] = 0 # This is the slowest line M[where, where] = 1 M = scipy.sparse.csc_matrix(M) But since A is 334863x334863, this takes like three minutes. If anyone has any suggestions on how to make this faster, please contribute them! For comparison, MATLAB does this same step imperceptibly fast. Thanks!

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• Getting URL of executing JavaScript file (IE6-7 problem mostly)...

  - by TooTallNate

  Hey all, I've been trying to throw together a generic function that retrieves the absolute URL of an executing JavaScript file on a web page: http://gist.github.com/433486 It works great in almost all the browsers I've tested (Firefox, Chrome, Safari, Opera v10 at least, and IE 8). It seems to fail, however, in IE 6 and 7. The callback function gets executed, but the retrieved name is simple the URL to the main HTML page, not the JavaScript file. So all I'm really asking is if there's some other way of getting the URL of the current JavaScript file (which could be IE 6 and 7 specific)? Thanks in advance!

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• Why is this js code so slow?

  - by SpiderPig

  This code takes 3 seconds on Chrome and 6s on Firefox. If I write the code in Java and run it under Java 7.0 it takes only 10ms. Chrome's JS engine is usually very fast. Why is it so slow here? btw. this code is just for testing. I know it's not very practical way to write a fibonacci function fib = function(n) { if (n < 2) { return n; } else { return fib(n - 1) + fib(n - 2); } }; console.log(fib(32));

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• In linux, is it possible to do partial reads on a regular file

  - by Jimm

  I need to write an application that spits out log entries to a regular file at a very fast rate. Also, there will be another process, that can read the same file concurrently at the time, other process would be writing to it. I have following questions How does read() determine EOF, specially in the case, where the underlying file could be concurrently being modified? Is it possible for read() to return partially written data from the other process write? For example, the write process wrote half a line and read would pick that half line and return? The application would be written in C on linux 2.6.x using Ex4 filesystem UPDATE: Below link points to the patch, that locks inode in EXT4, before reading and writing. http://patchwork.ozlabs.org/patch/91834/

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• Clarifying... So Background Jobs don't Tie Up Application Resources (in Rails)?

  - by viatropos

  I'm trying to get a better grasp of the inner workings of background jobs and how they improve performance. I understand that the goal is to have the application return a response to the user as fast as it can, so you don't want to, say, parse a huge feed that would take 10 seconds because it would prevent the application from being able to process any other requests. So it's recommended to put any operations that take more than say 500ms to execute, into a queued background job. What I don't understand is, doesn't that just delay the same problem? I know the user who invoked that background job will get an immediate response, but what if another user comes right when that background job starts (and it takes 10 seconds to finish), wont that user have to wait? Or is the main issue that, requests are the only thing that can happen one-at-a-time, while on the other hand a request can start while one+ background jobs are in the middle of running? Is that correct?

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• JUnit - assertSame

  - by Michael

  Can someone tell me why assertSame() do fail when I use values 127? import static org.junit.Assert.*; ... @Test public void StationTest1() { .. assertSame(4, 4); // OK assertSame(10, 10); // OK assertSame(100, 100); // OK assertSame(127, 127); // OK assertSame(128, 128); // raises an junit.framework.AssertionFailedError! assertSame(((int) 128),((int) 128)); // also junit.framework.AssertionFailedError! } I'm using JUnit 4.8.1.

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• Iterators over a LInked List in a Game in Java

  - by Matthew

  I am using OpenGl in android and they have a callback method called draw that gets called with out my control. (As fast as the device can handle if I am not mistaken) I have a list of "GameObjects" that have a .draw method and a .update method. I have two different threads that handle each of those. So, the question is, can I declare two different iterators in two different methods in two different threads that iterate over the same Linked List? If so, do I simply declare ListIterator<GameObject> l = objets.listIterator() each time I want a new iterator and it won't interfere with other iterators?

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• How to extract certain columns from a big Notepad text file?

  - by user560464

  I have a big text file and the data in it are in 5 columns, but I need just the first and the last column of that. It will take many days and probably with mistake if I want to enter the data of this two column one-by-one from here to another file. Is there a fast way to do this? For example: 1 1.0000000000000000 0.0000000000 S {0} 2 1.5000000000000000 0.3010299957 C {2} 3 1.7500000000000000 0.6020599913 S {0,2} 4 2.0000000000000000 0.7781512504 C {3} 5 2.3333333333333333 1.0791812460 C {3,2} 6 2.5000000000000000 1.3802112417 S {3,0,2} 7 2.5277777777777778 1.5563025008 S {0,3} 8 2.5833333333333333 1.6812412374 S {3,0,0,2} 9 2.8000000000000000 1.7781512504 C {5,2} 10 3.0000000000000000 2.0791812460 C {5,0,2} I need the first column (numbering) and the last inside { }.

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• Does the API call ExitProcess() work OK in VB6 if you follow the MS caveats?

  - by Clay Nichols

  Microsoft indicates that VB6 doesn't support ExitProcess (to exit and return a value). However, it indicates that this call can fail under certain circumstances (if a thread hasn't been completed, etc.) so I'm wondering whether this call will work OK (consistently :-) as long as you obey the caveats in the article. I could go a step further and call ExitProcess() from the Sub Main or Form which stared the app. Update: after some more reading (I really did research this a bit before asking ) I found a suggestion to use the TerminateProcess API instead. I'm investigating that option. Any thoughts?

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• Singleton Creation preference

  - by cwieland

  You can create singletons in a variety of ways. I am wondering which is better between these. +(ServerConnection*)shared{ static dispatch_once_t pred=0; __strong static id _sharedObject = nil; dispatch_once(&pred, ^{ _sharedObject = [[self alloc] init]; // or some other init method }); return _sharedObject; } I could see that this compiles down to something very fast. I would think that checking the predicate would be another function call. The other is: +(ServerConnection*)shared{ static ServerConnection* connection=nil; if (connection==nil) { connection=[[ServerConnection alloc] init]; } return connection; } Are there any major differences between the two? I know these are probably similar enough to not worry about it. But Just wondering.

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• Problems with the Enterframe Event

  - by user434565

  Hey guys, I have been developing a game using Flex, and used the Timer class to keep the main loop going. However, when I tried using the enterFrame event to do the main loop, there were a few problems. First of all, physics simulation seemed way too fast. Is the enterFrame event called more than once per frame? I set the application's global frame rate to 24, so shouldn't the application set off the event every 1/24 of a second? And the second problem is that when the game runs like this, some MXML components that are added are not shown. I have absolutely no idea why this happens. Help me please?!? Thanks.

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• Dev Environment Tests Not 100% Compatible with Staging/Production in Rails

  - by aronchick

  We use a bunch of specific apps/APIs that (unfortunately) differ quite a bit from dev to staging/production. We use tests and continuous integration at each stage, but in dev, the tests fail annoyingly (throwing dialogs, etc - thanks Windows for the 64-bit notification!). I hate to write custom code, but are there some best practices for how to allow a subset of testing in ruby/rails - or for patching out specific tests when you're running on Windows? Some specific situations that: Identify.exe does not support 64-bit Windows and throws a dialog. Sethostname is not supported, and throws an error (at least it's command line).

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