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  • simple c++ file opening issue

    - by Robert
    #include <iostream> #include <fstream> using namespace std; int main () { ofstream testfile; testfile.open ("test.txt"); testfile << "success!\n"; testfile.close(); return 0; } 1)called "g++ testfile.cpp" 2)created "test.txt" 3)called "chmod u+x a.out" 4)??? 5)file remains blank. I feel like an idiot for failing at something as trivial as this is supposed to be.

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  • Simple PHP query question: LIKE

    - by pg
    When I replace $ordering = "apples, bananas, cranberries, grapes"; with $ordering = "apples, bananas, grapes"; I no longer want cranberries to be returned by my query, which I've written out like this: $query = "SELECT * from dbname where FruitName LIKE '$ordering'"; Of Course this doesn't work, because I used LIKE wrong. I've read through various manuals that describe how to use LIKE and it doesn't quite make sense to me. If I change the end of the db to "LIKE "apples"" that works for limiting it to just apples. Do I have to explode the ordering on the ", " or is there a way to do this in the query?

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  • simple GET validation

    - by Andrew
    I have GET[] input and would like to carry out their validation. The input data is always a number by. Schema. I want to make sure that the pass number and the appropriate amount - not to throw the sql query. at this moment I am using the procedures $cc = $_GET['cc']; if ($cc=='') $cc='9012';$find=array("..", "/", "\\"); $replace=array("", "", ""); $cc=str_replace($find, $replace, $cc); $eic = $_GET['eic']; .... ect. // where f.ex. 9012 is an real existing data (in dbase) to generate sucure sql question GET[] variable data schema $_GET[$cc] - always 4 digits $_GET[$eic] - always 4 digits $_GET[$iy] - always 4 digits $_GET[$ir] - always 1 digit Can you show me a better way to secure my GET?

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  • Simple logic in javascript

    - by Saurabh
    I have four variables of type integer - var tip_1, tip_2, tip_3, tip_4; The value of these variables are getting fill by some other logic which is always between 1 to 10. I need to maintain a hash with variable name as "key" and value as "value" by following these rules - The variable with MAX value should be the first element in the hash and so on. e.g. if tip_1 = 4, tip_2 = 1, tip_3 = 2, tip_4 = 10 then hash should be something like, Hash = {tip_4, 10} {tip_1, 4} {tip_3, 2} {tip_1, 1} In case of tie following order should be considered - tip_1 tip_2 tip_3 tip_4;

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  • Rewriting URL's in ASP.net (Simple question)

    - by Tom Gullen
    On my master page I have: <link rel="stylesheet" href="css/default.css" /> I also have a page "blog.aspx" in the root directory. I have the rule: <rewrite url="~/blog/blog.aspx" to="~/blog.aspx" /> My questions are: Am I meant to make all my links in my site point to blog/blog.aspx now instead of just blog.aspx where it is physically located How is best to cope with the paths of the stylesheets etc now being messed up because they are one dir up?

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  • Writing a simple incrementer counter in rails

    - by Trip
    For every Card, I would like to attach a special number to them that increments by one. I assume I can do this all in the controller. def create @card = Card.new(params[:card]) @card.SpecNum = @card.SpecNum ++ ... end Or. I can be blatantly retarded. And maybe the best bet is to add an auto-incremement table to mysql. The problem is the number has to start at a specific number, 1020. Any ideas?

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  • Simple graphics import and manipulation

    - by gnuboi
    What do I need to do something like this? User builds a diagram and tags certain boxes and circles with text. User imports diagram into my program. My program processes the tagged boxes and circles and fills them with different colors. My program exports color-filled diagram. So the questions are... What graphics format supports tag-able boxes and circles? What existing application should I recommend users to use to produce diagrams in the above format? Would this graphics format be very easily readable in code to do things like reading tags and coloring in the associated boxes and circles? Free / open source libraries and apps are desired as this would be for academic use. Thank you!

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  • Simple nested setTimeout() only runs once (JavaScript)

    - by danielfaraday
    For some reason my galleryScroll() function only runs once, even though the function calls itself using setTimeout(). I'm thinking the issue may be related to scope, but I'm not sure: http://jsfiddle.net/CYEBC/2/ $(document).ready(function() { var x = $('#box').offset().left; var y = $('#box').offset().top; galleryScroll(); function galleryScroll() { x = x + 1; y = y + 1; $('#box').offset({ left: x, top: y }); setTimeout('galleryScroll()', 100); } });? The HTML: <html> <head> </head> <body> <div id="box"> </div> </body> </html>

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  • T-SQL Specific Syntax problem (Simple no doubt)

    - by Yoda
    Hi guys, I have an issue with a query I'm trying to run on some data, I guess the place to start is to describe the data. Ok so I have a list of email addresses, each email address has a unique ID and an account ID Also in my tables I have a set number which auto incrememnts, this will allow me to target duplicate email addresses What I need to do is something like this. Insert into duplicates (EMAIL,ACCOUNTID,ID) SELECT Email,AccountID,ID FROM EmailAddresses Group by Email,AccountID Having Count(email)>1 Order by AccountID, Email So essentially I want to select all duplicate email addresses and insert them (and their relative fields) into a new table broken down by accountID so I can run some further querys on it. I have been battling with this for way too long and could just use a fresh perspective. Cheers in advance

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  • What is wrong with this simple update query?

    - by Kyle Noland
    I get no error message, but the row is not updated. The rows integer is set 1 following the query, indicating that 1 row was affected. String query = "UPDATE contacts SET contact_name = '" + ContactName.Text.Trim() + "', " + "contact_phone = '" + Phone.Text.Trim() + "', " + "contact_fax = '" + Fax.Text.Trim() + "', " + "contact_direct = '" + Direct.Text.Trim() + "', " + "company_id = '" + Company.SelectedValue + "', " + "contact_address1 = '" + Address1.Text.Trim() + "', " + "contact_address2 = '" + Address2.Text.Trim() + "', " + "contact_city = '" + City.Text.Trim() + "', " + "contact_state = '" + State.SelectedValue + "', " + "contact_zip = '" + Zip.Text.Trim() + "' " + "WHERE contact_id = '" + contact_id + "'"; String cs = Lib.GetConnectionString(null); SqlConnection conn = new SqlConnection(cs); SqlCommand cmd = conn.CreateCommand(); cmd.CommandText = query; cmd.Connection.Open(); int rows = cmd.ExecuteNonQuery();

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  • very simple question but i am confused

    - by davit-datuashvili
    Suppose we have the following method (it is in c code): const char *bitap_search(const char *text, const char *pattern) My question is how can I compare text and pattern if they are char? This method is like a substring problem but I am confused a bit can I write in term of char such code? if (text[i]==pattern[i])?

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  • Make a simple animation in winforms using a loop

    - by Michael Quiles
    I need help making this loop to move a label move smoothly across the screen using count for the animation (its required). The labels location is currently in location 0,0 I'd like to make it go in a square right - down - left - back to its original position how can I accomplish this ? please give me an example using my code below. Thank You in advance. private void xAnimeTimer_Tick(object sender, EventArgs e) { int count; this.xAnimTimer.Stop(); for (count = 0; count <= 100; count++) { this.xAnimLabel.Left = count; } for (count = 0; count <= 150; count++) { this.xAnimLabel.Top = count; }

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  • I'm following Qt Tutorials and got a simple question

    - by nzer0
    If I want to create my own class MyWidget which inherits from QWidget Tutorial tells me to write constructor like this... MyWidget::MyWidget(QWidget *parent) : QWidget(parent){....} I'm wondering what is the role of : QWidget(parent) Does it mean explicit call for QWidget's constructor?

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  • Java or C# + XNA for some simple animations?

    - by lala
    I want to make a program that will involve some faces with various facial expressions. They will change from one facial expression to another based on their "mood" as influenced by user input. I know some java but I have done pretty much nothing with graphics. A friend tells me that it will be easier to do this in C# with XNA than to do it in java. I have about a month to do this, so I was hoping you folks would help me make a decision. Would I be better off figuring out how to do this in java, or learning C# and XNA and doing it in C#? Is it so much easier to do this in C# that it would be quicker to learn C# than to struggle with doing it in java? Will it probably come out looking much better if it is in C#?

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  • simple method that checks text is email with regular expression

    - by user223863
    Can't believe how difficult this seems to be all I want to is to validate a user inout using javascript to make sure that it is an email address. But can't get it to work: I am using: //validates a regulaer expression Utilities2.prototype.validateEmail = function(stringToValidateArg) { alert('about to check regexp'); var regExpPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,4}$/; alert(regExpPattern.test(stringToValidateArg)); } But this always returns false, any ideas why is it because of the regular expression?

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  • SQLite: Simple DELETE statement did not work

    - by user186446
    I have a table MRU, that has 3 columns. (VALUE varchar(255); TYPE varchar(20); DT_ADD datetime) This is a table simply storing an entry and recording the date time it was recorded. What I wanted to do is: delete the oldest entry whenever I add a new entry that exceeds a certain number. here is my query: delete from MRU where type = 'FILENAME' ORDER BY DT_ADD limit 1; The query returns an error. Thanks

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  • C program giving incorrect output for simple math!

    - by DuffDuff
    (all are declared as ints, none are initialized to anything beforehand. I have included math.h and am compiling with -lm) cachesize = atoi(argv[1]); blocksize = atoi(argv[3]); setnumber = (cachesize/blocksize); printf("setnumber: %d\n", setnumber); setbits = (log(setnumber))/(log(2)); printf("sbits: %d\n", setbits); when given cachesize as 1024 and blocksize as 16 the output is as follows: setnumber: 64 sbits: 5 but log(64)/log(2) = 6 ! It works correctly when given cachesize 512 and blocksize 32. I can't seem to win. I'm really hoping that it's a stupid mistake on my part, and I'd be grateful if anyone could point out what it is! Thank you! PS: I posted this in Yahoo Answers first but that was probably silly. Won't be doing that again.

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  • javascript simple question

    - by Michael
    window.addEventListener('unload', function(e) { MyClass.shutdown(); window.removeEventListener('unload', /* how to reference the function itself here? */); }, false); The question in the comment.

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  • Simple stream read/write question in java

    - by Marius
    Hi, I'm trying to upload a file via URLConnection, but i need to read/write it as a binary file without any encoding changes. So i've tried to read byte[] array from FileInputStream, but now i have an issue. The PrintWriter object i use for outputing to the server does not allow me to do writer.write(content) (where content is of type byte[]). How can i fix this? Or is there another way to quickly copy binary data from a FileInputStream to a PrintWriter? Thank you

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  • Simple CArray questions

    - by Holli
    1.) What is the difference between CArray <SomeClass> collection; and CArray <SomeClass,SomeClass> collection; or even CArray <SomeClass* ,SomeClass* > collection; ? 2.) While reading some comments on Stackoverflow I came to a note saying "Don't use CArray". Why should CArray not be used?

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  • looking for RTF template system with simple DSL

    - by 01
    Is there any framework that fills up rtf document with data? The idea is to make business people/testers change the document in MsWord and than generate reports from that. The problem is with tables, Id need to create some special DSL for handling tables and showing hidding text/page parts. Id rather not do that and use some existing solution. I tried to search for something, but I only found frameworks that can produce rtf output from xml input and i want to use rtf as input and output.

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  • Erlang: simple refactoring

    - by alexey
    Consider the code: f(command1, UserId) -> case is_registered(UserId) of true -> %% do command1 ok; false -> not_registered end; f(command2, UserId) -> case is_registered(UserId) of true -> %% do command2 ok; false -> not_registered end. is_registered(UserId) -> %% some checks Now imagine that there are a lot of commands and they are all call is_registered at first. Is there any way to generalize this behavior (refactor this code)? I mean that it's not a good idea to place the same case in all the commands.

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  • Simple php if query to double check

    - by skarama
    Is anything wrong with this code? <?php $variable = ; if (isset($variable)) { echo $variable ; echo "also this" ; } else echo "The variable is not set" ; ?> also, the other potential value of the variable is : $variable = <a href="http://www.mysite.com/article">This Article</a>; To clarify, I have a variable that may hold one of two possible values : an a href tag with it's url, or notihng at all. I need to have two different printouts for each of these cases, maybe I'm not doing it the right way though!

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  • Simple OpenCL Kernel

    - by Yuuta
    I'm trying to write a kernel which is a little long but the output is not correct. I took out a lot almost everything and finally narrowed down the an initialization problem and I found that the following works: __kernel void k_sIntegral(__global const float* eData,__global const unsigned long* elements,__global float* area){ const int i = get_global_id(0); if(i < elements[0]){ area[i] = i; } } But the following does not work: __kernel void k_sIntegral(__global const float* eData,__global const unsigned long* elements,__global float* area){ const int i = get_global_id(0); if(i < elements[0]){ __local float a,b,c,j,k,h,s; area[i] = i; } } Using the first kernel, I get: area[1] = 1 Using the second kernel, I get: area[1] = 0 (from calloc) Update: It seems like the code does work, but I need to change the function name otherwise it somehow calls the previous function even though it was not compiled (?). Any leads to why that happens? If anyone can let me know what might be the problem I'll be really grateful, thanks in advance!

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