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• proper way to solve mysql max user connection error

  - by Rahul a common name

  Hello every one, I'm using PHP with MYSQL database as both are open source and easy to use. I'm getting problem when I execute insert and/or update of millions of row one after another while this operation perform I got the MYSQL error that: 'max_user_connections' active connections which is the best way to solve this problem. I don't want to use another database or language other then PHP. connect_db(); $query = "insert into table(mobno,status,description,date,send_deltime,sms_id,msg,send_type) values('".$to."','".$status."','".$report."','','".$timewsha1."','".$smsID."','','".$type."')"; $result = mysql_query($query) or ("Query failed : " . mysql_error()); this query will execute thousand of times. and then server give connection error.

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• Download Drools RuleFlow files from Guvnor

  - by Shakil Siraj

  Hello all, I can upload RuleFlow (.rf) files to Guvnor (both 5.1 M1 and 5.0) and execute them with rules on the server. If I want to use Guvnor as a repository, is there any way I can download the RuleFlow files into my project on the fly? On the package level, Guvnor provides some "Information and Important URLs" which only talk about rules. I was wondering if there is any other URL which will give me the RuleFlow files? Is WebDav my only other option? Thanks in adavance.

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• SQLite Modify Column

  - by Nathan

  I need to modify a column in a SQLite database but I have to do it programatically due to the database already being in production. From my research I have found that in order to do this I must do the following. Create a new table with new schema Copy data from old table to new table Drop old table Rename new table to old tables name That seems like a ridiculous amount of work for something that should be relatively easy. Is there not an easier way? All I need to do is change a constraint on a existing column and give it a default value.

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• Learning Ruby on Rails

  - by Ethan Gunderson

  As it stands now I'm a Java and C# developer, but the more and more I look at Ruby on Rails, the more I really want to learn it. What have you found to be the best route to learn RoR? Would it be easier to develop on Windows, or should I just run a virtual machine with linux? Is there an ide that can match the robustness of Visual Studio? Any programs to develop that give a good overhead of what to do? Any good books? Seriously, any tips/tricks/rants would be awesome.

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• jQuery in Opera User JS Doesn't Work

  - by Axonn

  Hello ::- ). I'm playing with some Opera User JS. I included "1jquery.min.js" in my User JS folder (1 in front because Opera loads them alphabetically). Unfortunately, it doesn't appear to be working. window.onload = OnWindowLoad; $(document).ready(function() { alert ($('#area_19')); }); function OnWindowLoad () { alert ($('#area_19')); alert(document.getElementById("area_19")); } What's interesting about this code is that the first two alerts come back in NULL, but the last one does find the object! So the element definitely exists in the page, but my jQuery seems unable to get it. What's even stranger is that the jQuery "ready" function works, indicating that I do have jQuery capability. I'm quite puzzled about all this ::- /. Hopefully somebody can give me a clue ::- ).

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• SQL Loop over a family tree

  - by simon831

  Using SQL server 2008. I have a family tree of animals stored in a table, and want to give some information on how 'genetically diverse' (or not) the offspring is. In SQL how can I produce sensible metrics to show how closely related the parents are? Perhaps some sort of percentage of shared blood, or a number of generations to go back before there is a shared ancestor? AnimalTable Id Name mumId dadId select * from AnimalTable child inner join AnimalTable mum on child.[mumId] = mum.[Id] inner join AnimalTable dad on child.[dadId] = dad.[Id] inner join AnimalTable mums_mum on mum.[mumId] = mums_mum.[Id] inner join AnimalTable mums_dad on mum.[dadId] = mums_dad.[Id] inner join AnimalTable dads_mum on dad.[mumId] = dads_mum.[Id] inner join AnimalTable dads_dad on dad.[dadId] = dads_dad.[Id]

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• How to append strings using sprintf ?

  - by rejinacm

  Hey everybody, Thank you all before I start. I am facing a serious issue with sprintf. suppose my code snippet is : sprintf(Buffer,"Hello World"); sprintf(Buffer,"Good Morning"); sprintf(Buffer,"Good Afternoon"); . . . Some hundred sprints.... If i do like this, its getting overwritten. How can I avoid overwritting using sprintf. If i give a printf at the end i want to see all the lines. How to xchieve this.

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• Gravity Sort : Is this possible programatically?

  - by Bragaadeesh

  Hi, I've been thinking recently on using the Object Oriented design in the sorting algorithm. However I was not able to find a proper way to even come closer in making this sorting algorithm that does the sorting in O(n) time. Ok, here is what I've been thinking for a week. I have a set of input data. I will assign a mass to each of the input data (assume input data a type of Mass). I will be placing all my input data in the space all at same distance from earth. And I will make them free fall. According to gravitational law, the heaviest one hits the ground first. And the order in which they hit will give me the sorted data. This is funny in some way, but underneath I feel that this should be possible using the OO that I have learnt till date Is it really possible to make a sorting technique that uses gravitational pull like scenario or am I stupid/crazy?

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• python: sorting

  - by nabizan

  hi im doing a loop so i could get dict of data, but since its a dict it's sorting alphabetical and not as i push it trought the loop ... is it possible to somehow turn off alphabetical sorting? here is how do i do that data = {} for item in container: data[item] = {} ... for key, val in item_container.iteritems(): ... data[item][key] = val whitch give me something like this data = { A : { K1 : V1, K2 : V2, K3 : V3 }, B : { K1 : V1, K2 : V2, K3 : V3 }, C : { K1 : V1, K2 : V2, K3 : V3 } } and i want it to be as i was going throught the loop, e.g. data = { B : {K2 : V2, K3 : V3, K1 : V1}, A : {K1 : V1, K2 : V2, K3 : V3}, C : {K3 : V3, K1 : V1, K2 : V2} }

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• how to create a rounded transparent rectangle by using cocoa touch ?

  - by srikanth rongali

  Hi, I need to create a rounded rectangular box in which there will be 6 buttons in iPhone application. And the rectangular box is transparent. Each button have an image and text. And they are also transparent. ( Here transparent means we can see the background image of the box. Sorry for my vocabulary.) I could not get how to start it. I thought of the following one but, By using core graphics draw the outside rounded rectangle and then draw inside rectangles like 2x3 grid. Can I make with this ? Are there any good and easy methods than this. Please give me some idea how to start over with ? Thank you.

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• return type of modal dialog box is undefined

  - by Aru

  Hi, I am using the modal dialog box to open the modal dialog. Here is the code var Window; function PopDis() { Window=window.showModalDialog('/collector/modalBox.jsp', '', 'dialogHeight:300px; dialogWidth:500px;scroll:no; status:no; help:no; center:yes; resizable:no'); } In another function i want to close the modal dialog. Code is function CloseModalDialog() { alert("in fun close"+Window); Window.close(); } But var Window is undefined hence unable to close the window. Please give me the solution.

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• Subclassing Satchmo's Category model, but then getting the error "'Manager' object has no attribute 'root_categories'"

  - by hellsgate

  I'm using Satchmo as part of a website I'm currently building. At the moment I'm trying add more functions to the Satchmo Category class, but obviously I'm not going to make any changes to the Satchmo files. So, I thought that subclassing the Category class would give me a new class which contains all the Satchmo Category properties and methods while allowing me to add my own. However, either Python subclassing doesn't work like that, or I am doing it wrong. Here is the code I'm using to subclass Category: from product.models import Category class MyCategory(Category): """ additional functions to pull data from the Satchmo store app """ One of the methods I can normally use from the Category class is: Category.objects.root_categories() however, when I try to access MyCategory.objects.root_categories() I get the following error: AttributeError: 'Manager' object has no attribute 'root_categories' Can anyone point me in the right direction for solving this?

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• Of these 3 methods for reading linked lists from shared memory, why is the 3rd fastest?

  - by Joseph Garvin

  I have a 'server' program that updates many linked lists in shared memory in response to external events. I want client programs to notice an update on any of the lists as quickly as possible (lowest latency). The server marks a linked list's node's state_ as FILLED once its data is filled in and its next pointer has been set to a valid location. Until then, its state_ is NOT_FILLED_YET. I am using memory barriers to make sure that clients don't see the state_ as FILLED before the data within is actually ready (and it seems to work, I never see corrupt data). Also, state_ is volatile to be sure the compiler doesn't lift the client's checking of it out of loops. Keeping the server code exactly the same, I've come up with 3 different methods for the client to scan the linked lists for changes. The question is: Why is the 3rd method fastest? Method 1: Round robin over all the linked lists (called 'channels') continuously, looking to see if any nodes have changed to 'FILLED': void method_one() { std::vector<Data*> channel_cursors; for(ChannelList::iterator i = channel_list.begin(); i != channel_list.end(); ++i) { Data* current_item = static_cast<Data*>(i->get(segment)->tail_.get(segment)); channel_cursors.push_back(current_item); } while(true) { for(std::size_t i = 0; i < channel_list.size(); ++i) { Data* current_item = channel_cursors[i]; ACQUIRE_MEMORY_BARRIER; if(current_item->state_ == NOT_FILLED_YET) { continue; } log_latency(current_item->tv_sec_, current_item->tv_usec_); channel_cursors[i] = static_cast<Data*>(current_item->next_.get(segment)); } } } Method 1 gave very low latency when then number of channels was small. But when the number of channels grew (250K+) it became very slow because of looping over all the channels. So I tried... Method 2: Give each linked list an ID. Keep a separate 'update list' to the side. Every time one of the linked lists is updated, push its ID on to the update list. Now we just need to monitor the single update list, and check the IDs we get from it. void method_two() { std::vector<Data*> channel_cursors; for(ChannelList::iterator i = channel_list.begin(); i != channel_list.end(); ++i) { Data* current_item = static_cast<Data*>(i->get(segment)->tail_.get(segment)); channel_cursors.push_back(current_item); } UpdateID* update_cursor = static_cast<UpdateID*>(update_channel.tail_.get(segment)); while(true) { if(update_cursor->state_ == NOT_FILLED_YET) { continue; } ::uint32_t update_id = update_cursor->list_id_; Data* current_item = channel_cursors[update_id]; if(current_item->state_ == NOT_FILLED_YET) { std::cerr << "This should never print." << std::endl; // it doesn't continue; } log_latency(current_item->tv_sec_, current_item->tv_usec_); channel_cursors[update_id] = static_cast<Data*>(current_item->next_.get(segment)); update_cursor = static_cast<UpdateID*>(update_cursor->next_.get(segment)); } } Method 2 gave TERRIBLE latency. Whereas Method 1 might give under 10us latency, Method 2 would inexplicably often given 8ms latency! Using gettimeofday it appears that the change in update_cursor-state_ was very slow to propogate from the server's view to the client's (I'm on a multicore box, so I assume the delay is due to cache). So I tried a hybrid approach... Method 3: Keep the update list. But loop over all the channels continuously, and within each iteration check if the update list has updated. If it has, go with the number pushed onto it. If it hasn't, check the channel we've currently iterated to. void method_three() { std::vector<Data*> channel_cursors; for(ChannelList::iterator i = channel_list.begin(); i != channel_list.end(); ++i) { Data* current_item = static_cast<Data*>(i->get(segment)->tail_.get(segment)); channel_cursors.push_back(current_item); } UpdateID* update_cursor = static_cast<UpdateID*>(update_channel.tail_.get(segment)); while(true) { for(std::size_t i = 0; i < channel_list.size(); ++i) { std::size_t idx = i; ACQUIRE_MEMORY_BARRIER; if(update_cursor->state_ != NOT_FILLED_YET) { //std::cerr << "Found via update" << std::endl; i--; idx = update_cursor->list_id_; update_cursor = static_cast<UpdateID*>(update_cursor->next_.get(segment)); } Data* current_item = channel_cursors[idx]; ACQUIRE_MEMORY_BARRIER; if(current_item->state_ == NOT_FILLED_YET) { continue; } found_an_update = true; log_latency(current_item->tv_sec_, current_item->tv_usec_); channel_cursors[idx] = static_cast<Data*>(current_item->next_.get(segment)); } } } The latency of this method was as good as Method 1, but scaled to large numbers of channels. The problem is, I have no clue why. Just to throw a wrench in things: if I uncomment the 'found via update' part, it prints between EVERY LATENCY LOG MESSAGE. Which means things are only ever found on the update list! So I don't understand how this method can be faster than method 2. The full, compilable code (requires GCC and boost-1.41) that generates random strings as test data is at: http://pastebin.com/e3HuL0nr

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• T-SQL Where statement - OR

  - by Zyphrax

  Sorry for the vague title but I really didn't know what title to give to this problem: I have the following result set: ID Data Culture 1 A nl-NL 2 B nl-NL 3 C nl-NL 4 A en-GB 5 B en-GB 6 A en 7 B en 8 C en 9 D en 10 A nl I would like to mimic the ASP.Net way of resource selection, user Culture (nl-NL) SELECT Data FROM Tbl WHERE Culture = 'nl-NL' Or when there are no results for the specific culture, try the parent Culture (nl) SELECT Data FROM Tbl WHERE Culture = 'nl' Or when there are no results for the parent culture, try the default Culture (en) SELECT Data FROM Tbl WHERE Culture = 'en' How can I combine these SELECT-statements in one T-SQL statement? I'm using LINQ so a LINQ expression would be even greater. The OR-statement won't work, because I don't want a mix of cultures. The ORDER BY-statement won't help, because it returns multiple records per culture.

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• Login and Register System

  - by Darknight

  I'm darknight. My email is : [email protected] I'm creating a website and now I want to add login and register system. But i don't know how to use .sql and .php . I have downloaded some login and register system code. But their format is .sql and .php And they say to add the files to database.... How can i do that? What is database? I'm using weebly.com to create websites. If anyone can give me the right answer to [email protected] I will reward him/her.

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• How to analyze dump file from delphi dll?

  - by Yann

  I'm an escalation engineer on a product which use both c# and delphi 2006 code. In most cases c# issues are debugged with windbg and delphi 2006 issues with eurekalog. But when the issue is a delphi memory usage, eurekalog doesn't give enough information to fix the issue and the only thing i have to debug it is a full memory dump file. I cannot (or i don't know how to) load symbol file in windbg because it is a .map file and not a .pdb file. So my questions are: Does anyone know how to load symbol from .map file in windbg? (Converting .map to .pdb or other) Does anyone know a tool to analyze dump file for delphi application?

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• Running Sybase ISQL scripts from windows batch file

  - by user1328709

  I have already researched on this site as well as on google extensively for this. I have created a number of batch files that perform certain automated transactions(backups etc) on our production database. i want to further simplify my end of day processes by taking the dumps using a script that accepts input of some parameters. the script is able to login the isql prompt but unable to do the execution of the commands. @ECHO ***Started*** @ECHO Enter MonthDay(MMDD) SET /p md= @ECHO %md% mkdir \\10.20.1.17\arch\212%md%_banking set run=isql -Uuser -SORBITS -Ppass %run% @echo dump database banking to '/media/newArch/212%md%_banking/212%md%EOD_banking.dmp' with compression=5 @echo dump database master to '/media/newArch/212%md%_banking/212%md%EOD_master.dmp' @echo go pause I have been unsuccessful at putting these in a separate script file because the script itself uses a passed parameter. Please give me hints and links to Thanks

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• Javascipt: Get mouse position relative to parent element

  - by Peterim

  Is there any way to get mouse position relative to it's parent element? Let's say I have a structure: <div id="parent"> <span class="dot"></span> </div> When I bring my mouse over span element I need to get its position relative to its parent element (<div id="parent">). PageX/ClientX give me position relative to page/client area, so it's not working for me. Any suggestions are greatly appreciated. Thank you.

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• does PHP 5.3 change the way file_get_contents works?

  - by ceejayoz

  I'm having an odd issue with PHP's file_get_contents. In the past, file_get_contents on a remote file returns the text of that file regardless of the HTTP status code returned. If I hit an API and it sends back JSON error information with a status of 500, file_get_contents gives me that JSON (with no indication that an error code was encountered). I've just set up a Ubuntu 10.04 server, which is the first Ubuntu to have PHP 5.3. Instead of giving me the JSON, PHP throws a warning when a 500 error is present. As a result, I can't parse the JSON and give a nice error message. It's nice that PHP is noticing there's an error in the remote file, but I need the JSON even (especially!) if there's a 500 error. There doesn't appear to be any way to switch this off. Has anyone encountered this? Any tips?

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• documentBuilder: The process cannot access the file because it is being used by another process

  - by st mnmn

  I am using DocumentBuilder (of openXML api), to those who doesn't know the documentBuilder I'll give a short explanation: it has a function 'BuildDocument' which gets list of sources (each source contains wmldocument), and string of fileName to save to. public static void BuildDocument(List<Source> sources, string fileName) the purpose of this function is to build one word docx which contains all the sources. it merges some docs to one. at the end of its functionality it saves the doc using: File.WriteAllBytes(...) but when I run my project on the server I keep getting the error: "The process cannot access the file because it is being used by another process." few times it works ok. and in the visualStudio it also works without errors. what can be the problem?

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• How to upload a CSV file and and read it's data in the client side itself and send the data as a stream through a ajax post?

  - by sunshine

  I need to upload a CSV file and get its contents form the client side itself. Then post it to the server where I can retriev the stream and do the string manipulations in the serer action methods. Is there any jquery plugin for this task to upload a csv file and send data as a stream using ajax or jason? I am really new to this area.I am working in VS2010 AND mvc3. Can some one give me a clear solution for this mater?? Any examples?? I did search a lot but did not find any suitable solution yet. Can anyone please help me with this matter. Thanks so much.

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• Am I immoral for using a variable name that differs from its type only by case?

  - by Jason Baker

  For instance, take this piece of code: var person = new Person(); or for you Pythonistas: person = Person() I'm told constantly how bad this is, but have yet to see an example of the immorality of these two lines of code. To me, person is a Person and trying to give it another name is a waste of time. I suppose in the days before syntax highlighting, this would have been a big deal. But these days, it's pretty easy to tell a type name apart from a variable name. Heck, it's even easy to see the difference here on SO. Or is there something I'm missing? If so, it would be helpful if you could provide an example of code that causes problems.

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• Setting slime-enable-evaluate-in-emacs

  - by Tyler

  Hi, I am using SBCL with slime, and have the following code: (swank::eval-in-emacs '(with-current-buffer (slime-repl-buffer) (insert (propertize "foo" 'font-lock-face '(:foreground "red"))))) (print "here is some text") In general if I try to execute anything with swank:: prefixed to it emacs will give a security error, and this particular one tells me I need to set slime-enable-evaluate-in-emacs to true. Where is this value? I haven't been able to find a slime or swank config. & settings file. Thanks much.

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• Bulkinsert from CSV into db (C#) -> max number of rows in a web application?

  - by Swoosh

  Web application - C#, .Net, SQL 2k5. I recently used bulkinsert on an other application and I thought I would like to give it a try. I am going to receive a CSV file with 1000 rows, which will most likely add 500 000 (that is five hundred thousand) records in the database. I don't have any idea yet about this huge amount if it's going to work out well. I am afraid that it will time out. I didn't do any testing yet, but I am pretty sure it would time out eventually. Is there a way to make it not time out (I don't know ... split the bulkinsert into 1000 pieces :D) or I should try to do something like BCP, with a SQL job ...

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• Compiling OpenSSL for boost asio for Microsoft Visual Studio 2010

  - by user560106

  I compiled boost with bjam, and then I compiled OpenSSL. Both of them work separately. I set up the links in Visual Studio 10 to point to my OpenSSL library directory. But when I attempt to compile example boost ssl asio programs I get 44 unresolved external linker errors like this one: 1testing.obj : error LNK2019: unresolved external symbol _SSLv23_server_method referenced in function "public: void __thiscall boost::asio::ssl::detail::openssl_context_service::create(struct ssl_ctx_st * &,enum boost::asio::ssl::context_base::method)" (?create@openssl_context_service@detail@ssl@asio@boost@@QAEXAAPAUssl_ctx_st@@W4method@context_base@345@@Z) Can you please give me step-by-step instructions on properly linking OpenSSL to boost? Thank you so much

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