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  • How to retrieve MYSQL records as an INSERT statement.

    - by Aglystas
    I'm trying come up with the best method of synchronizing particular rows of 2 different database tables. So, for example there's 2 product tables in different databases as such... Origin Database product{ merchant_id, product_id, ... additional fields } Destination Database product{ merchant_id product_id ... additional fields } So, the database schema is the same for both. However I'm looking to select records with a particular merchant_id, remove all records from the destination table that have that merchant_id and replace those records with records from the origin database of the same merchant_id. My first thought was using mysqldump, parsing out the create table statements, and only running the Insert Statements. Seems like a pain though. So I was wondering if there is a better technique to do this. I would think mysql has some method of creating INSERT statements as output from a SELECT statement, so you can define how to insert specific record information into a new db. Any help would be appreciated, thank you much.

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  • Paperclip - Validate File Type but not Presence

    - by Lowgain
    I am using paperclip to handle my file uploads, and in one situation I don't want the file to be mandatory. I do however want to make sure it is a specific file type when it is present. I have this: class TestModel < ActiveRecord::Base #stuff has_attached_file :sound #etc... validates_attachment_content_type :sound, :content_type => ['audio/mp3', 'application/x-mp3'] end And when I have no sound file present, it tells me it is not one of the valid content types. I've tried adding '' to the :content_type array, which also doesn't work! I also attempted creating a lambda procedure for the :if property, but I can't get it to run without some kind of error. Anything missing here?

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  • Why would bytesTotal increase in a AS3 preloader?

    - by justkevin
    I'm creating a custom preloader for a Flex app and have noticed the following behavior: when loading, the progress bar goes to 100%, then down then back up, and so on until the app is finished loading. When I put a trace in the dowloadprogress listener, I see that while the app is loading, both bytesLoaded and bytesTotal increase, but not necessarily at the same time. Code: private function onDownloadProgress(event:ProgressEvent):void { var loaded:int = event.bytesLoaded; var total:int = event.bytesTotal; trace(event.target,loaded,total); _starfield.progress = loaded/total; } Output: [object Preloader] 134276 134276 [object Preloader] 265348 285007 [object Preloader] 285007 285007 [object Preloader] 678223 1322116 [object Preloader] 809295 1322116 [object Preloader] 1322116 1322116 [object Preloader] 1322116 1322116 [object Preloader] 1387652 1584342 [object Preloader] 1791882 1791882 [object Preloader] 2293133 2293133 [object Preloader] 2362938 2362938 [object Preloader] 2362938 2362938 [object Preloader] 2362938 2362938 Why does bytesTotal change during load?

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  • What is the suggested way to show exception messages on UI which were produced in Business Layer?

    - by burak ozdogan
    Hi, Is there a pattern OR 'a best practice' on creating user's friendly messages in the presentation layer by using exceptions which were thrown from the Business Layer? Actually in many cases I prefer to throw Application Exceptions and this is forcing me to catch them on UI (aspx.cs pages). And if the process is complex which may produce many different types of exceptions I have to have many catch blocks to produce specific error messages. Is there a better way coming to your mind? A pattern maybe for similar cases? thanks

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  • Multithread Communication

    - by Robert
    I'm creating a WPF application that uses a custom object to populate all the controls. The constructor of that object is initiated by an EventHandler that waits for an API. The problem I'm having is when I try to access any information from that object using a button for example, it returns an error saying "The calling thread cannot access this object because a different thread owns it". I'm assuming this is because the EventHandler creates a new thread which doesn't allow the MainThread to have access to it. Any ideas on how to get around this?

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  • What is the best way to make a schedule in MFC

    - by Vanwaril
    I have a list of items that are each associated with a start and end time and date. What I want to do is, given a time and date range, display only the items that fall within that window, even partially. What I'm doing is creating a CListCtrl with all the items in it and the CListCtrl is sorted by start time by default. But given a time range, I don't know how to search for the first item that is within the range. Another problem with the list control is it displays as a list, whereas it would be nice if there was a control that could also show things that are concurrent side by side. I'm doing this within a dialog application.

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  • Linq ChangeConflictException (ASP.NET MVC) - occurs when submitting DataContext changes

    - by Alex
    System.Data.Linq.ChangeConflictException: 2 of X updates failed. at System.Data.Linq.ChangeProcessor.SubmitChanges(ConflictMode failureMode) at System.Data.Linq.DataContext.SubmitChanges(ConflictMode failureMode) at PROJECT.Controllers.HomeController.ClickProc(Int32 id, String code, String n) This is what I get very often. This action is done thousands of times a day, and I get this exception about once every 5 seconds. From what I understand it happens when something changes in the database in the period between creating DataContext and updating it. Am I right? What's the problem here and how can I fix it?

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  • How do I execute a page-defined JavaScript function from a Firefox extension?

    - by yuku
    Hi, I'm creating a Firefox extension for demo purposes. I to call a specific JavaScript function in the document from the extension. I wrote this in my HTML document (not inside extension, but a page that is loaded by Firefox): document.funcToBeCalled = function() { // function body }; Then, the extension will run this on some event: var document = Application.activeWindow.activeTab.document; document.funcToBeCalled(); However it raises an error saying that funcToBeCalled is not defined. Note: I could get an element on the document by calling document.getElementById(id);

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  • When not to use a Drupal node?

    - by stotastic
    I've recently created a very simple CRUD table where the user stores some data. For the data, I created a custom node. The functionality works great for creating, editing, and deleting data in the CRUD table using the basic node functionality (I'm actually amazed how fast and easy it was to program the basic functionality with proper access controls using only a tiny bit of code).... Since the data isn't meant to be treated the same way as 'content' such as a blog post (no title, no body, no commments, no revisions, shouldn't show up on ?q=node page, no previews, no teasers, etc)... I find that I'm spending most of my time 'turning off' and modifying the stuff that drupal does automatically for nodes. I know its a matter of taste, but where should one draw the line on what should be treated as a node and what shouldn't? In other words, would it be better to program this stuff from scratch without using nodes?

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  • Executing commands on a Unix box from ASP .NET

    - by StefanE
    I'm in process to create a few utilities for my team to make life a bit easier working with our Unix boxes(most of them Solaris based). For example I'm creating a ASP .NET page to display the output of TOP. Also plan to be able to restart processes with the KILL -15 command. Now I wonder if there is any nice modules out the do the work for me or am I better off just going ahead with my own SSH communication? It would of course make sense building the app on the unix box directly but I'm not able to do this.

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  • AI testing framework

    - by Jon
    I am looking at developing an AI player for a simple game I have created in C#. I will be creating a population of the bots and evolving them over generations. What I was wondering is there any frameworks out there that could be good for this sort of testing / development. Ideally I would like something that I could plug any / some type of games into and say, OK so have a population of X run it over Y generations and chart the results for me. I was having a think about how I would create something that would do this for me and allow me to reuse this later for different AI projects and all I could think of was to have some sort of core code and some interface contracts that the game and AI would use so that the server can script it. What are your thoughts, does anyone have any practical experience of this sort of thing?

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  • problem with doctrine:build-schema

    - by Ying
    Hi, im using symfony with doctrine, and Im trying to generate the schema yml file from a db. I get an this error SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'group' at line 1. Failing Query: "DESCRIBE group"I have a table named group in my database, and I suspect that this is screwing it up. Its not access problems as ive checked my db previleges. Any suggestions on what I can do? I have tried the quote-identifier attribute but with no luck : ( Im also struggling to find some good doctrine documentation. i cant seem to find where a list of attributes are, say for a creating a column in the schema.yml file. I tried reaching out to symfony forums but they are not responsive! Any help would be greatly appreciated! Thanks..

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  • Check if there are any repeated elements in an array recursively

    - by devoured elysium
    I have to find recursively if there is any repeated element in an integer array v. The method must have the following signature: boolean hasRepeatedElements(int[] v) I can't see any way of doing that recursively without having to define another method or at least another overload to this method (one that takes for example the element to go after or something). At first I thought about checking for the current v if there is some element equal to the first element, then creating a new array with L-1 elements etc but that seems rather inefficient. Is it the only way? Am I missing here something?

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  • While Loop Taking Alot of CPU Usage

    - by CuriousUser
    I am creating a keystroke logger for my personal interest, as well wanting to know how to capture and use them as functions (like key shortcuts). I got the code to learn how keylogger and GetAsyncKeyState() work: http://www.rohitab.com/discuss/index.php?showtopic=9931 I got it to run under Code::Blocks, but the weirdest things is that when I check my task manager, my CPU Usage rises to 100%. When I close the program, it goes back down, and goes back up to 100 when I turn it back on. I presume it's because of the infinite while loop, constantly checking for inputs, but I wanna know if there's anyway to decrease the CPU usage, without losing function. P.S How would I make a key shortcut? Like press (Ctrl + E) to make the program exit?

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  • Powershell function that creates a array by input

    - by user2971548
    I'm quite new to Powershell and working on a little project with functions. What I'm trying to do is creating a function that takes 2 arguments. The first argument ($Item1) decides the size of the array, the second argument ($Item2) decides the value of the indexes. So if I write: $addToArray 10 5 I need the function to create a array with 10 indexes and the value 5 in each of them. The second argument would also have to take "text" as a value. This is my code so far. $testArray = @(); $indexSize = 0; function addToArray($Item1, $Item2) { while ($indexSize -ne $Item1) { $indexSize ++; } Write-host "###"; while ($Item2 -ne $indexSize) { $script:testArray += $Item2; $Item2 ++; } } Any help is appreciated. Kind regards Dennis Berntsson

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  • What languages allow cross-platform native executables to be created?

    - by JT
    I'm frustrated to discover that Java lacks an acceptable solution for creating programs that will run via double-click. Other than .NET for Windows, what modern and high-level programming languages can I write code in that can be compiled for various platforms and run as a native/binary in each (Windows, Linux, OSX (optional)) Assuming I wanted to write code in python, for instance, is there a cohesive way that I could distribute my software which wouldn't require users to do anything special to get it to run? I want to write and distribute software for computer-illiterate and Java has turned out to be a real pain in this respect.

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  • Is extending a singleton class wrong?

    - by Anwar Shaikh
    I am creating a logger for an application. I am using a third party logger library. In which logger is implemented as singleton. I extended that logger class because I want to add some more static functions. In these static functions I internally use the instance (which is single) of Logger(which i inherited). I neither creates instance of MyLogger nor re-implemented the getInstance() method of super class. But I am still getting warnings like destructor of MyLogger can not be created as parent class (Loggger) destructor is not accessible. I want to know, I am I doing something wrong? Inheriting the singleton is wrong or should be avoided??

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  • Getting Google Chrome to Ignore IE Javascript

    - by swajak
    I'm creating a slideshow using javascript that fades images. Awhile back, I discovered that to change the opacity of an image, I have to use a different API, depending on whether the page is viewed in Firefox or IE. Firefox: img.style.opacity = [value 0 to 1]; IE: img.style.filter="progid:DXImageTransform.Microsoft.Alpha(opacity= [value 0 to 100] )"; So, currently, I use <script LANGUAGE="JScript"> for code that is meant for IE. This was suggested in the Mozilla docs. The problem: Chrome thinks my <script LANGUAGE="JScript"> code is valid, when it is not. How to make Chrome ignore the code inside <script LANGUAGE="JScript"> ? Or how to make my opacity code cross-browser?

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  • Dummy SMTP Server for testing apps that send email

    - by Patrick McElhaney
    I have a lot of apps that send email. Sometimes it's one or two messages at a time. Sometimes it's thousands of messages. In development, I usually test by substituting my own address for any recipient addresses. I'm sure that's what everybody else does, until they get fed up with it and find a better solution. I was thinking about creating a dummy SMTP server that just catches the messages and dumps them in a SQLLite database, or an mbox file, or whatever. But surely such a tool already exists? How do you test sending email?

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  • How do I use Some/None Options in this F# example?

    - by Phobis
    I am new to F# and I have this code: if s.Contains("-") then let x,y = match s.Split [|'-'|] with | [|a;b|] -> int a, int b | _ -> 0,0 Notice that we validate that there is a '-' in the string before we split the string, so the match is really unnecessary. Can I rewrite this with Options? I changed this code, it was originally this (but I was getting a warning): if s.Contains("-") then let [|a;b|] = s.Split [|'-'|] let x,y = int a, int b NOTE: I am splitting a range of numbers (range is expressed in a string) and then creating the integer values that represent the range's minimum and maximum.

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  • Create multiple TCP Connections in C# then wait for data

    - by Ryan French
    Hi Everyone, I am currently creating a Windows Service that will create TCP connections to multiple machines (same socket on all machines) and then listen for 'events' from those machines. I am attempting to write the code to create a connection and then spawn a thread that listens to the connection waiting for packets from the machine, then decode the packets that come through, and call a function depending on the payload of the packet. The problem is I'm not entirely sure how to do that in C#. Does anyone have any helpful suggestions or links that might help me do this? Thanks in advance for any help!

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  • Does UIActivityIndicator require manual threading on iPhone

    - by Akusete
    I am running creating an iPhone application which performs a costly operation and I wanted to create an activityIndicator to let the user know the application has not frozen. The operation is performed entirely in one event call... so there is no chance for the UI framework to receive control to actually display and animate this indicator. The sample apps which use the UIActivityIndicator (or any other similar animation) start and stop the animation in different events, triggered separately at different stages of the program. Do I need to manually create a separate thread to run my operation in, or is there already default support for this kind of behavior?

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  • Codeigniter: A nice straight forward tutorial on how to build a reset password/forgotten password?

    - by Psychonetics
    I've built a full sign up system with user account activation, login, validation, captcha etc. To complete this I now need to implement a forgot password/reset password feature.. I have created one function that generates a random password 8 characters, another method that takes that random password word and applies sha1 and hashing. Also one that takes that hashed password and stores it in a table in the database. I will keep these methods to one side as they might come in handy later on but for now I would like to know if anyone can point me to a nice tutorial for creating a password reset feature for my website. Thanks in advance

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  • CUDA small kernel 2d convolution - how to do it

    - by paulAl
    I've been experimenting with CUDA kernels for days to perform a fast 2D convolution between a 500x500 image (but I could also vary the dimensions) and a very small 2D kernel (a laplacian 2d kernel, so it's a 3x3 kernel.. too small to take a huge advantage with all the cuda threads). I created a CPU classic implementation (two for loops, as easy as you would think) and then I started creating CUDA kernels. After a few disappointing attempts to perform a faster convolution I ended up with this code: http://www.evl.uic.edu/sjames/cs525/final.html (see the Shared Memory section), it basically lets a 16x16 threads block load all the convolution data he needs in the shared memory and then performs the convolution. Nothing, the CPU is still a lot faster. I didn't try the FFT approach because the CUDA SDK states that it is efficient with large kernel sizes. Whether or not you read everything I wrote, my question is: how can I perform a fast 2D convolution between a relatively large image and a very small kernel (3x3) with CUDA?

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  • Wordpress: Not able to retrieve css for new plugin in admin mode

    - by Steven
    I'm creating a new plugin which will have it's own css file. The css file resides in the root folder of the plugin. In the plugin section of the admin interface, I have added a few text fields fields. But the CSS is not applied. I'm adding the CSS file using this code: // Register styling add_action('admin_init', 'event_styles'); function event_styles() { wp_register_style('event_cal', plugins_url('eventcall.css',__FILE__)); wp_enqueue_style('event_cal'); } The following code gives me the CSS path: echo plugins_url('eventcall.css',__FILE__); and outputs http://mysite.com/wp-content/plugins/wp-eventcal/eventcall.css If I try to enter this URL directly in the browser, it only shows me the front page. And if I look in the source code using Firebug, where the link to the CSS should be, I only find the entire HTML code for the front page. Am I using wrong code to use backend in admin interface? In my HOST file, I have added ``

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