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  • How do I perform a batch insert in Django?

    - by Thierry Lam
    In mysql, you can insert multiple rows to a table in one query for n 0: INSERT INTO tbl_name (a,b,c) VALUES(1,2,3),(4,5,6),(7,8,9), ..., (n-2, n-1, n); Is there a way to achieve the above with Django queryset methods? Here's an example: values = [(1, 2, 3), (4, 5, 6), ...] for value in values: SomeModel.objects.create(first=value[0], second=value[1], third=value[2]) I believe the above is calling an insert query for each iteration of the for loop. I'm looking for a single query, is that possible in Django?

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  • java I/O is blocked while reading on socket when i put off the battery from device.

    - by gunjan goyal
    hi, i m working on client socket connection. client is a GPRS hardware device. i m receiving request from this client on my serversocket and then opening multiple threads. my problem is that when device/client close the socket then my IO detects that throws an exception but when i put off the battery from the device while sending the request to the serversocket it is blocked without throwing any exception. please help me out. thanks in advance. this is my code. try { while ((len = inputStream.read(mainBuffer)) -1) { System.out.println("len= " + len); }//end of while System.out.println("out of while loop");//which is never printed on screen. } catch (IOException e) { e.printStackTrace(); } regards gunjan goyal

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  • How do I check out Eclipse projects from CVS using the command line

    - by Jeff James
    Hi. I'm trying to check out the Mylyn project from Eclipse. However, I can't use Eclipse to check out the projects and am having to do it via the command line. I'm behind a firewall so am basing my attempt on http://wiki.eclipse.org/CVS_Howto#CVS_and_firewalls. I'm not very familiar with CVS. When I run my CVS command, it fails to connect: cvs -td :pserver:[email protected]:443/cvsroot/tools checkout mylyn -> main: Session ID is w4PO5KiMwQmaD6uu -> main loop with CVSROOT=/cvsroot/tools -> safe_location( where=(null) ) -> open_connection_to_server (:pserver:[email protected]:443/cvsroot/tools) -> Connecting to proxy.eclipse.org(206.191.52.48):443. cvs [checkout aborted]: unrecognized auth response from proxy.eclipse.org: SSH-1.99-OpenSSH_4.2 Can anyone tell me what I'm doing wrong? Thanks

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  • [C#] Onpaint events (invalidated) changing execution order after a period normal operation (runtime)

    - by Luke Mcneice
    Hi all, I have 3 data graphs that are painted via the their paint events. When I have data that I need to insert into the graph I call the controls invalidate() command. The first control's paint event actually creates a bitmap buffer for the other 2 graphs to avoid repeating a long loop. So the invalidate commands are in a specific order (1,2,3). This works well, however when the graphed data reaches the end of the graph window (PictureBox) where the data would normally start scrolling, the paint events begin firing in the wrong order (2,3,1). has anyone came across this before? why might this be happening?

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  • jCarousel, IE6 and Fixed Width

    - by Pat Long - Munkii Yebee
    We are using jCarousel on our websites to display images. Simple enough. We have fairly flexible layouts so the carousels are not always the same width. FF, IE7+, Chrome, Safari etc work perfectly well taking up the space available. However IE6 ends up sending the jCarousel script into a loop and warns that a script is stopping the page from loading correctly. To stop IE6 from failing we are having to specify a fixed width in CSS for the carousel container. Is this a problem that others have had with IE6 and jCarousel?

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  • jquery noConflict not working in IE8 only

    - by slik
    I have a website using the prootype framework and I am looking to use a jquery plugin. Everything works just not in IE8. It works in ie7 which amazes me. Any idea what maybe wrong? jQuery.noConflict(); function OpenUp(sURL){ window.open(sURL,null,'height=560,width=820,status=yes,toolbar=yes,menubar=yes,location=yes,resizable=yes,scrollbars=yes',false); } jQuery(document).ready(function($) { $("head").append("<link>"); css = $("head").children(":last"); css.attr({ rel: "stylesheet", type: "text/css", href: "/my/docs/jquery.simplyscroll.css" }); $("#scroller").simplyScroll({ autoMode: 'loop', framerate: 1, speed: 1 }); }); I also tired the following: var $j = jQuery.noConflict(); var j = jQuery.noConflict(); everythig works just not in IE8 alone.

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  • What would the conditional statement be to filter these inputs?

    - by dmanexe
    I have a page with a form, and on the form are a bunch of input check boxes. In the following page, there's the following code to process the inputs from the page before (which are set as an ID). <? $field = $this->input->post('measure',true); $totals = array(); foreach($field as $value): $query = $this->db->get_where('items', array('id' => $value['input']))->row(); $totals[] = $query->price; ?> #HTML for displaying estimate output here <?php endforeach; ?> How would I have the loop run conditionally only if there was a check on the input on the page before?

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  • Need a mysql query to extract data from mm-forms

    - by Kirill
    http://cl.ly/201a11b430bf60ef9e97 is what the rows look like, after I clean them up a bit: SELECT fk_form_joiner_id,form_key,value FROM wp_contactform_submit_data WHERE form_key!='page_post_id' AND form_key!='captcha-802' AND form_key!='page_post_title' AND form_key!='user_ID' What I need is a query where it would transform this into a structure like: id | First-name | Surname-name | your-email | dob | address-1 | address-2 | county | postcode | phone ------------------------------------------------------------------------------------------------------- 88 | jack | Somethin | [email protected] | dob | (etc) I think I know a way to do this through php, but I think there must be a way to do it as a mysql query. Ultimately, I need to export this (into a csv), but if you could give me a query that would output this into a mysql table (or at least a workable select query, that I could then turn into an insert query loop, to create a table), I'd do it form there. Thank you.

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  • Is writing to a socket an arbitrary limitation of the sendfile() syscall?

    - by Sufian
    Prelude sendfile() is an extremely useful syscall for two reasons: First, it's less code than a read()/write() (or recv()/send() if you prefer that jive) loop. Second, it's faster (less syscalls, implementation may copy between devices without buffer, etc...) than the aforementioned methods. Less code. More efficient. Awesome. In UNIX, everything is (mostly) a file. This is the ugly territory from the collision of platonic theory and real-world practice. I understand that sockets are fundamentally different than files residing on some device. I haven't dug through the sources of Linux/*BSD/Darwin/whatever OS implements sendfile() to know why this specific syscall is restricted to writing to sockets (specifically, streaming sockets). I just want to know... Question What is limiting sendfile() from allowing the destination file descriptor to be something besides a socket (like a disk file, or a pipe)?

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  • do while is breaking. How to skip rows PHP

    - by Victor
    Hello all. I have a question probably lame but it made me stuck I have the a db query $query_Recordset10 = "SELECT * FROM products WHERE razdel='mix' AND ID='$ID+1' AND litraj='$litri' ORDER BY ID ASC"; $Recordset10 = mysql_query($query_Recordset10, $victor) or die(mysql_error()); $row_Recordset10 = mysql_fetch_array($Recordset10); $totalRows_Recordset10 = mysql_num_rows($Recordset10); I have do while loop in my page and the idea i to show products matching this criteria. But if the next product is 2 or more ID's ahead my cycle breaks. So is there a way for skipping this row and get the next ID matching the criteria. Thank you very much.

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  • [java] Efficiency of while(true) ServerSocket Listen

    - by Submerged
    I am wondering if a typical while(true) ServerSocket listen loop takes an entire core to wait and accept a client connection (Even when implementing runnable and using Thread .start()) I am implementing a type of distributed computing cluster and each computer needs every core it has for computation. A Master node needs to communicate with these computers (invoking static methods that modify the algorithm's functioning). The reason I need to use sockets is due to the cross platform / cross language capabilities. In some cases, PHP will be invoking these java static methods. I used a java profiler (YourKit) and I can see my running ServerSocket listen thread and it never sleeps and it's always running. Is there a better approach to do what I want? Or, will the performance hit be negligible? Please, feel free to offer any suggestion if you can think of a better way (I've tried RMI, but it isn't supported cross-language. Thanks everyone

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  • Help replace this SQL cursor with better code

    - by user318573
    Can anyone give me a hand improving the performance of this cursor logic from SQL 2000. It runs great in SQl2005 and SQL2008, but takes at least 20 minutes to run in SQL 2000. BTW, I would never choose to use a cursor, and I didn't write this code, just trying to get it to run faster. Upgrading this client to 2005/2008 is not an option in the immediate future. ------------------------------------------------------------------------------- ------- Rollup totals in the chart of accounts hierarchy ------------------------------------------------------------------------------- DECLARE @B_SubTotalAccountID int, @B_Debits money, @B_Credits money, @B_YTDDebits money, @B_YTDCredits money DECLARE Bal CURSOR FAST_FORWARD FOR SELECT SubTotalAccountID, Debits, Credits, YTDDebits, YTDCredits FROM xxx WHERE AccountType = 0 AND SubTotalAccountID Is Not Null and (abs(credits)+abs(debits)+abs(ytdcredits)+abs(ytddebits)<>0) OPEN Bal FETCH NEXT FROM Bal INTO @B_SubTotalAccountID, @B_Debits, @B_Credits, @B_YTDDebits, @B_YTDCredits --For Each Active Account WHILE @@FETCH_STATUS = 0 BEGIN --Loop Until end of subtotal chain is reached WHILE @B_SubTotalAccountID Is Not Null BEGIN UPDATE xxx2 SET Debits = Debits + @B_Debits, Credits = Credits + @B_Credits, YTDDebits = YTDDebits + @B_YTDDebits, YTDCredits = YTDCredits + @B_YTDCredits WHERE GLAccountID = @B_SubTotalAccountID SET @B_SubTotalAccountID = (SELECT SubTotalAccountID FROM xxx2 WHERE GLAccountID = @B_SubTotalAccountID) END FETCH NEXT FROM Bal INTO @B_SubTotalAccountID, @B_Debits, @B_Credits, @B_YTDDebits, @B_YTDCredits END CLOSE Bal DEALLOCATE Bal

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  • Subsonic linq using activerecord very slow compared to simplerepository

    - by skiik
    Anyone know anything about why linq queries are about 6 times slower when querying using active record vs simplerepository? The below code runs 6 times slower than when i query the data using a simple repository. This code is executed 1000 times in a loop Thanks in advance string ret = ""; // if (plan == null) { plan =VOUCHER_PLAN.SingleOrDefault(x => x.TENDER_TYPE == tenderType); } if (plan == null) throw new InvalidOperationException("voucher type does not exist." + tenderType); seq = plan.VOUCHER_SEQUENCES.First(); int i = seq.CURRENT_NUMBER; seq.CURRENT_NUMBER += seq.STEP; seq.Save();

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  • Javascript - Concatenate Multiple NodeLists Together

    - by Emtucifor
    I was originally asking for an elegant way to simulate the Array.concat() functionality in IE or older browsers, because it seemed that concat was not supported. Only, of course it is and the reason the object didn't support it is because it wasn't an array. Oops! getElementsByTagName returns a NodeList, not an array. The real question, then, is: what's a good way to get a single list of all the form elements in a document (input, select, textarea, button) to loop through them? An array isn't required... a single NodeList would be perfect, too. Note that I'm using IE6 as this is for a corporate intranet (soon IE8 though).

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  • Efficient way to calculate byte length of a character, depending on the encoding

    - by BalusC
    What's the most efficient way to calculate the byte length of a character, taking the character encoding into account? In UTF-8 for example the characters have a variable byte length, so each character needs to be determined individually. As far now I've come up with this: char c = getItSomehow(); String encoding = "UTF-8"; int length = new String(new char[] { c }).getBytes(encoding).length; But this is clumsy and inefficient in a loop since a new String needs to be created everytime. I can't find other and more efficient ways in the Java API. I imagine that this can be done with bitwise operations like bit shifting, but that's my weak point and I'm unsure how to take the encoding into account here :) If you question the need for this, check this topic.

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  • Invert bitmap colors

    - by Alex Orlov
    I have the following problem. I have a charting program, and it's design is black, but the charts (that I get from the server as images) are light (it actually uses only 5 colors: red, green, white, black and gray). To fit with the design inversion does a good job, the only problem is that red and green are inverted also (green - pink, red - green). Is there a way to invert everything except those 2 colors, or a way to repaint those colors after inversion? And how costly are those operations (since I get the chart updates pretty often)? Thanks in advance :) UPDATE I tried replacing colors with setPixel method in a loop for(int x = 0 ;x < chart.getWidth();x++) { for(int y = 0;y < chart.getHeight();y++) { final int replacement = getColorReplacement(chart.getPixel(x, y)); if(replacement != 0) { chart.setPixel(x, y, replacement); } } } Unfortunetely, the method takes too long (~650ms), is there a faster way to do it, and will setPixels() method work faster?

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  • Objective C - RegexKitLite - Parsing inner contents of a string, ie: start(.*?)end

    - by Stu
    Please consider the following: NSString *myText = @"mary had a little lamb"; NSString *regexString = @"mary(.*?)little"; for)NSString *match in [myText captureComponentsMatchedByRegex:regexString]){ NSLog(@"%@",match); } This will output to the console two things: 1) "mary had a little" 2) "had a" What I want is just the 2nd bit of information "had a". Is there is a way of matching a string and returning just the inner part? I'm fairly new to Objective C, this feels a rather trivial question yet I can't find a less messy way of doing this than incrementing an integer in the for loop and on the second iteration storing the "had a" in an NSString.

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  • Creating a "less"-like console pager interface for pysqlite3 database

    - by Eric
    I would like to add some interactive capability to a python CLI application I've writen that stores data in a SQLite3 database. Currently, my app reads-in a certain type of file, parses and analyzes, puts the analysis data into the db, and spits the formatted records to stdout (which I generally pipe to a file). There are on-the-order-of a million records in this file. Ideally, I would like to eliminate that text file situation altogether and just loop after that "parse and analyze" part, displaying a screen's worth of records, and allowing the user to page through them and enter some commands that will edit the records. The backend part I know how to do. Can anyone suggest a good starting point for creating that pager frontend either directly in the console (like the pager "less"), through ncurses, or some other system?

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  • CheckboxList not setting Selected with Viewstate disabled

    - by Earlz
    I have a CheckboxList that seems to load and do everything right, except for when I do a postback, it will not have the Item.Selected property set. I have viewstate disabled for the entire page. I load it like so(inside Page_Load on every load): foreach (DataRow service in d.Tables[0].Rows) { cblServices.Items.Add(new ListItem((string)service["description"], service["id"].ToString())); } My markup is simple: <asp:CheckBoxList runat="server" ID="cblServices" Width="300px"></asp:CheckBoxList> and then, I use basically something like this(in a _Click serverside event for a button) foreach(ListItem item in cblServices.Items){ if(item.Selected){ MyLabel.Text+="selected: "+item.Value+item.Text; } } and MyLabel never has any text added to it. I can verify with the debugger that it does reach the _Click's foreach loop, but no item is ever selected. What could be the cause of this?

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  • javascript trying to get 3rd nested array.length and value

    - by adardesign
    How can i get the 3rd nested array (in this case the array starting with "yellow") the array looks like this: [ ["Large", ["yellow", "green", "Blue"], ["$55.00", "$55.00", "$55.00"] ["Medium", ["yellow", "green", "Blue", "Red"], ["$55.00", "$55.00", "$55.00", "$55.00"] ] ["small", ["yellow", "green", "Blue", "Red"], ["$55.00", "$55.00", "$55.00", "$55.00"] ] ] I am trying to get to the ["yellow", "green", "Blue"] array's length and loop to get the values for(i=0; colorNSize.dataArray[0][0][1].length<i; i++){ alert(colorNSize.dataArray[colorNSize.Sizeindex][0][0][i])// alert's nothing } It actually alerts the length of "Large" which is "5" is there a limit for nested arrays? Can this be done?

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  • PHP detmine numbers in between two numbers then query

    - by Joshua Anderson
    This should be simple but I can't figure it out <?php $testid = 240; $curid = 251; $cal = $curid - $testid; echo $cal; ?> I want to determine the numbers in between two other numbers so for this example it detects there are 11 numbers in between the $testid and $curid, but i dont need it to do that. I need it to literally figure the numbers in between $curid - $testid which in this example would be 241, 242, 243... all the way to 251 then i need to create a loop with those numbers and do a query below with each one $cal = $curid - $testid; mysql_query("SELECT * FROM wall WHERE id='".$cal."'") // and for each number mysql should out put each data field with those numbers. Thanks again, love you guys.

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  • Databind Parent/Child relation with Mysql

    - by e2k
    What is the best way to databind parent/child relations? Lets say I have two simple objects: Parent with the following properties, ParentId, Name and Childs and Child with the following properties, ChildId, Name and Parent. I want to write a repository using MySql for this but is failing when I bind both Childs and Parent properties, I have only been able to bind either the Childs property of parent or the Parent property och Child or else I would get a infinite loop. Thinking of it the preferable solution would be to only bind this properties when requested. If I use Linq to sql i would be able to write Parent.Childs[0].Parent.Name but how should I accomplish this with my own repository and with MySql, could anyone point me in the right direction? Looking at the Linq 2 sql generated classes they use EntitySet<Child and EntityRef<Parent could this be used with Mysql? I had a thought of using my IChildRepository in the Parent object and let the Public IEnumerable Childs databind the childs but it seems not right? Best regards E2k

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  • Java, searching through folders to match a name

    - by Nick
    Hi folks, I using java to search for a file or folder that matches a specific case. For instance i want to search through all the files and folders and iterate through them as many times as necessary untill i find a result. The catch I searching for files and folders through a binary image of a file system. This means i doubt there are any preexisting classes such java.file.* to do it for me. If it helps i can tell you that i can tell the difference between files and folders easily enough. (a folder is flagged as 0x20) The only way i can think of is to do a standard loop and iterated several times but this limits me if a file or folder is several folders deep. All input greatly welcome

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  • C# Sharp Windows Application prevents Windows from shutting down / logging off

    - by user299711
    I have written a C# Windows Forms application, not a service (it is only used when the user is logged in and has a graphical user interface) that has a background thread running in an infinite loop. When I try shutting down Windows (7) however, it tells me the program is preventing it from shutting down or logging off and asks me whether I want to force a shutdown. Now, is there any possibility for my program to become aware (get a handler) of Windows trying to quit it or to log off? So, what I need is to make the application realize when Windows tries to quit. Thanks in advance.

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  • Is there any simple way to test two PNGs for equality?

    - by Mason Wheeler
    I've got a bunch of PNG images, and I'm looking for a way to identify duplicates. By duplicates I mean, specifically, two PNG files whose uncompressed image data are identical, not necessarily whose files are identical. This means I can't do something simple like compare CRC hash values. I figure this can actually be done reliably since PNGs use lossless compression, but I'm worried about speed. I know I can winnow things down a little by testing for equal dimensions first, but when it comes time to actually compare the images against each other, is there any way to do it reasonably efficiently? (ie. faster than the "double-for-loop checking pixel values against each other" brute-force method?)

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