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Articles indexed in March 2010

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  • best way of oracle database partitions?

    - by murali
    hi, I have one table of 50k keywords and I am providing the auto-complete feature for these keywords based on count mechanism. But still getting the keywords takes time.. In what way would the database partitions have to be done for fast retrieving.... help me plz.....

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  • How is dynamic memory allocation handled when extreme reliability is required?

    - by sharptooth
    Looks like dynamic memory allocation without garbage collection is a way to disaster. Dangling pointers there, memory leaks here. Very easy to plant an error that is sometimes hard to find and that has severe consequences. How are these problems addressed when mission-critical programs are written? I mean if I write a program that controls a spaceship like Voyager 1 that has to run for years and leave a smallest leak that leak can accumulate and halt the program sooner or later and when that happens it translates into epic fail. How is dynamic memory allocation handled when a program needs to be extremely reliable?

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  • Asp.net MVC, after using jeditable (Edit in place)

    - by coure06
    Ok, i can use jeditable to edit-in-place some content on a page and the content will be saved to a database. But whats the best way to re get that text-content from db to show into a place holder? p id="paraNo34" class="editable" --What i will write here so that it will get content from a db's table: [Content], where id=="paraNo34". /p The problem is if i will use some hard coded text like p id="paraNo34" class="editable" --Some text here /p I will able to edit-in-place using jeditable but when i will refresh page it will show the same "Some text here" as its not getting data from db.

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  • EOF of excel in vb6

    - by Mark
    how do i write the code in vb6 in finding the EOF of excel file can anyone help me? i try to code this and it works.. --- Dim excelApp as Excel.Application Dim excelWB as Excel.Workbook Set excelApp = New Excel.Application Set excelWB = excelApp.Workbooks.Open("D:\Book1.xls") Dim xlsRow as Long Dim EOF as Boolean xlsRow = 1 Do While (EOF = False) If (excelWB.Sheets("Sheet1").Cells(xlsRow, 1).Value = "") Then EOF = True Else xlsRow = xlsRow + 1 End If Loop <--- this code is working, but the only problem is only the column 1 will be checked and the others is not. Can anyone help me on how to improve this code to check all rows and column of excel cells.

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  • NSKeyedArchiver save method ( that i made) crashed the iphone simulator

    - by Kevin
    i saw this approach on a tutorial, and the message is working for their example but when i implement this it does not work. from what i can tell the iphone simulator crashes when i do a [ self saveSettingsData]. TheSettings is class object that i declare and initialize in the appdelagate with these methods. the error says terminating due to uncaught exception. i am new to the iphone sdk and objective, so i really can't figure out what is going on thanks to any one who can help, i am ready to literally pull my hair out. (NSString *) SettingsDataFilePath { NSString * settingsDataFilePath ; NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) ; NSString * documentsDirectory = [paths objectAtIndex:0] ; settingsDataFilePath = [[documentsDirectory stringByAppendingPathComponent: @"SetggggtingsData.plist" ] retain] ; return settingsDataFilePath ; } (void) saveSettingsData { [NSKeyedArchiver archiveRootObject:[TheSettings copy] toFile:[self SettingsDataFilePath]] ;

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  • Will my shared variables loose value? (asp.net vb)

    - by Phil
    I have a class includes.vb that holds some variables (sharing them with other pages) like: Public Shared pageid As Integer = 0 I then have a function that does some work with these variables returning them with values; Return pageid When I step through the code, the variables have values (while stepping through the function), but when they are returned to the page, they come back null. Do they loose value everytime a page is loaded? Can you suggest an alternative method? Thanks a lot.

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  • Memory allocation in Xvfb

    - by michael
    Hi, I have following this blog in setting Xvfb in my ubuntu environment: http://corpocrat.com/2008/08/19/how-to-install-xvfb-x11-server-in-linux-server/ So I did this: Xvfb :1 -screen 0 800x600x24& My question is does Xvfb only allocate memory during initialization? i.e. just enough for a display of 800x600x24? So as I have more and more programs (different programs or same program multiple times) display to the Xvfb , it does not allocate more memory? Thank you.

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  • PIX_FMT_YUYV422 8 bits conversion ffmpeg

    - by Sridhar
    Hi, I have a raw YUYV422 buffer with 8-bit 4:2:2 Component Y’CbCr format (Y0, Cb, Y1, Cr order). I know that ffmpeg's PIX_FMT_YUYV422 only handle 16-bit buffers.So I am getting Bad memory error when scaling that buffer into YUV420P. Can any one give me a clue, how can I use this buffer with ffmpeg to covert into YUV420. Thanks, Raghu

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  • ARM processor for gigabit ethernet

    - by Surjya Narayana Padhi
    Hi Geeks, I am working on a project which is a handheld device to do some measurements on IP packets. So I need to process the packets by my processor. I am planning use ARM processor for this project. Can anybody suggest if ARM is the right choice for packet processing of Gigabit range?

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  • Preventing New line in a multiline text box

    - by Dilse Naaz
    Hi, How to prevent the new line character at the beginning of the text entering in a multiline text box? Now, I already trimmed the white space at the beginning of the text. but i can't prevent the new line character that has to be occurred by entering the enter key on the most beginning of the text box. Please help me. thanks in advance.

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  • How to find minimum of nonlinear, multivariate function using Newton's method (code not linear algeb

    - by Norman Ramsey
    I'm trying to do some parameter estimation and want to choose parameter estimates that minimize the square error in a predicted equation over about 30 variables. If the equation were linear, I would just compute the 30 partial derivatives, set them all to zero, and use a linear-equation solver. But unfortunately the equation is nonlinear and so are its derivatives. If the equation were over a single variable, I would just use Newton's method (also known as Newton-Raphson). The Web is rich in examples and code to implement Newton's method for functions of a single variable. Given that I have about 30 variables, how can I program a numeric solution to this problem using Newton's method? I have the equation in closed form and can compute the first and second derivatives, but I don't know quite how to proceed from there. I have found a large number of treatments on the web, but they quickly get into heavy matrix notation. I've found something moderately helpful on Wikipedia, but I'm having trouble translating it into code. Where I'm worried about breaking down is in the matrix algebra and matrix inversions. I can invert a matrix with a linear-equation solver but I'm worried about getting the right rows and columns, avoiding transposition errors, and so on. To be quite concrete: I want to work with tables mapping variables to their values. I can write a function of such a table that returns the square error given such a table as argument. I can also create functions that return a partial derivative with respect to any given variable. I have a reasonable starting estimate for the values in the table, so I'm not worried about convergence. I'm not sure how to write the loop that uses an estimate (table of value for each variable), the function, and a table of partial-derivative functions to produce a new estimate. That last is what I'd like help with. Any direct help or pointers to good sources will be warmly appreciated. Edit: Since I have the first and second derivatives in closed form, I would like to take advantage of them and avoid more slowly converging methods like simplex searches.

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  • How do I serialize an enum value as an int?

    - by Espo
    I want to serialize my enum-value as an int, but i only get the name. Here is my (sample) class and enum: public class Request { public RequestType request; } public enum RequestType { Booking = 1, Confirmation = 2, PreBooking = 4, PreBookingConfirmation = 5, BookingStatus = 6 } And the code (just to be sure i'm not doing it wrong) Request req = new Request(); req.request = RequestType.Confirmation; XmlSerializer xml = new XmlSerializer(req.GetType()); StringWriter writer = new StringWriter(); xml.Serialize(writer, req); textBox1.Text = writer.ToString(); This answer (to another question) seems to indicate that enums should serialize to ints as default, but it doesn't seem to do that. Here is my output: <?xml version="1.0" encoding="utf-16"?> <Request xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <request>Confirmation</request> </Request> I have been able to serialize as the value by putting an "[XmlEnum("X")]" attribute on every value, but this just seems wrong.

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  • Some clients cannot connect to Server 2008 R2 VPN

    - by Robl
    Hi all, Have a server 2008 r2 setup as a VPN server. We have created a windows group to control access to the VPN called vpn-users. Clients are all Windows 7 Pro. This all seems to work fine except some users cannot connect to the VPN! For example I try to logon to the VPN from a client and get an error saying the server refused the connect due to a policy in place. Specifically authentication type! Fine I think. So i drop that user into the vpn-users group created for this and try again and hey presto the user can now logon! Great. Now try this with another user. But this time I get the same error even though I have dropped them into the vpn-users group!! So does anyone have any idea why this works for some users and not for others?? I have tried moving the user from certain OU's in AD to others, copying the account, taking the user out of the vpn-users group and then back in but get the same error each time. Any thoughts anyone?

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  • Divs over images using JavaScript

    - by Abhi
    Say I have an image with a couple of dots in a web page. When someone clicks on the dots I want a JavaScript function to be executed and then a div placed over the clicked dot in the image. Something akin to markers in maps. How do I go about doing this?

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  • IE's responseXML.getElementsByTagName() unable to handle non English character ?

    - by trix
    I have a javascript that does this (http is your XMLHttpRequest object) var r = http.responseXML.getElementsByTagName('item'); The issue is variable r is always an empty list if the response contains non-English character (r.length is 0). The response header is correctly set Content-Type: text/xml;charset=ISO-8859-1 This is what the response from the webserver looks like <?xml version='1.0' encoding='UTF-8'?> <d> <r> <item value="jmob" label="John Möb"/> </r> </d> It happens only in IE (both IE6 and IE8), works in Firefox and Chrome. If items contain only English characters, it works fine. Is there a workaround for this ?

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  • question about pcap

    - by scatman
    hi, i have to do a sniffer as an assignment for the security course. i am using c and the pcap library. i got everything working well (since i got a code from the internet and changed it). but i have some questions about the code. u_int ip_len = (ih->ver_ihl & 0xf) * 4; ih is of type ip_header, and its currently pointing the to ip header in the packet. ver_ihl gives the version of the ip i can't figure out what is: & 0xf) * 4; any help?

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