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  • Interface for classes that have nothing in common

    - by Tomek Tarczynski
    Lets say I want to make few classes to determine behaviour of agents. The good practice would be to make some common interface for them, such interface (simplified) could look like this: interface IModel { void UpdateBehaviour(); } All , or at least most, of such model would have some parameters, but parameters from one model might have nothing in common with parameters of other model. I would like to have some common way of loading parameters. Question What is the best way to do that? Is it maybe just adding method void LoadParameters(object parameters) to the IModel? Or creating empty interface IParameters and add method void LoadParameters(IParameters parameters)? That are two ideas I came up with, but I don't like either of them.

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  • WPF Skin Skinning Security Concerns

    - by Erik Philips
    I'm really new to the WPF in the .Net Framework (get that out of the way). I'm writing an application where the interface is very customizable by simply loading .xaml (at the moment a Page element) files into a frame and then mapping the controls via names as needed. The idea is to have a community of people who are interested in making skins, skin my application however they want (much like Winamp). Now the question arises, due to my lack of Xaml knowledge, is it possible to create malicious Xaml pages that when downloaded and used could have other embedded Iframes or other elements that could have embed html or call remote webpages with malicious content? I believe this could be the case. If this is the case then I two options; either I have an automated process that can remove these types of Xaml files by checking it’s elements prior to allowing download (which I would assume would be most difficult) or have a human review them prior to download. Are there alternatives I’m unaware of that could make this whole process a lot easier?

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  • How do quickly search through a .csv file in Python

    - by Baldur
    I'm reading a 6 million entry .csv file with Python, and I want to be able to search through this file for a particular entry. Are there any tricks to search the entire file? Should you read the whole thing into a dictionary or should you perform a search every time? I tried loading it into a dictionary but that took ages so I'm currently searching through the whole file every time which seems wasteful. Could I possibly utilize that the list is alphabetically ordered? (e.g. if the search word starts with "b" I only search from the line that includes the first word beginning with "b" to the line that includes the last word beginning with "b") I'm using import csv. (a side question: it is possible to make csv go to a specific line in the file? I want to make the program start at a random line) Edit: I already have a copy of the list as an .sql file as well, how could I implement that into Python?

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  • How to specify a font from javascript?

    - by Steven Lu
    I am trying to customize a view-src bookmarklet for iPad. This one is looking pretty good so far. But I want to make it just a little more readable: The Courier (New) font is a bit ugly even (especially?) on the retina display and I'd prefer any one of DejaVu Sans Mono, Monaco, Lucida Console, Bitstream Vera Sans Mono. I tried to modify the bookmarklet script by adding: pre.style.fontFamily = '"DejaVu Sans Mono", "Lucida Console", Monaco;'; It's not doing the trick. Perhaps prettyprint cancels out my fontFamily setting when it loads. Maybe I can set it at the end of the script somehow...

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  • How do sprites work?

    - by Alan
    How do sprites work? I've seen sprites from old school games like Super Mario Brothers, and wondered how they're animated to make a game. They're always presented as one big image map, so how are they used? For Mario (as an example) are there precalculated image co-ordinates that outline mario, and are swapped between various mario sprites to produce animation? Or are sprites pre "cut" during game initialization using precalculated images co-ordinates and stored in memory somewhere? Obviously I know nothing about game development.

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  • Can't DER encode and BER decode RSA public key

    - by Mildred
    I have problems using Crypto++ to save a RSA public key (that I obtained loading a private key file in PKCS#8 format). When decoding the key, I always get a BERDecodeErr exception. Here is the code I am using: CryptoPP::RSASSA_PKCS1v15_SHA_Signer _signer; CryptoPP::RSASSA_PKCS1v15_SHA_Verifier _verifier; CryptoPP::ByteQueue bytes; //_signer.AccessPublicKey().Save(bytes); // seem to save private key instead _signer.AccessKey().DEREncodePublicKey(bytes); //_verifier.AccessKey().Load(bytes); //_verifier.AccessKey().BERDecodePublicKey(bytes, 0, 0); _verifier.AccessPublicKey().Load(bytes); I also tried with the instructions commented above, without success. How do you do to save or open the public key? The public key looks like this in hex format, is there a tool to check its format / validity (regarding what crypto++ supports) ? 3081890281810097e24f2e95504a397e90fbc56d1b330ab2ab97a0d326007b890e40013f9e1d9bd9 f54b0c0840782ddae19b5b4595d8f8b9ffe0d2120174fcbc39585c5867cd2dfba69f8e540caa2c52 de8f08278a34e9249120500117f0ba756c5bb2be660013160db9f82f75deb7ccf63742a9e945da6c cf30c2b109b73342daaabd02b872e50203010001

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  • Not able to open a file in php

    - by ehsanul
    The following code works when invoking through the command line with php -f test.php, from root. It does not work though when being invoked via apache when loading the php page. The code chokes at fopen() and the resulting web page just says "can't open file". <?php $fp = fopen("/path/to/some_file.txt","a") or die("can't open file"); fwrite($fp,"some text"); fclose($fp); ?> I tried to play with the file permissions, but to no avail. I changed the user/group with chown apache:apache test.php and changed permissions with chmod 755 test.php. Here is the relevant result of ls -l /path/to/some_file.txt: -rwxr-xr-x 1 apache apache 0 Apr 12 04:16 some_file.txt

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  • AS3 Pass FlashVars to loaded swf

    - by Robin
    Hi I have a A.swf which loads B.swf onto a movieclip and needs to pass it some FlashVars. When loading B.swf with html, I can pass FlashVars fine. When passing from A.swf, it gets a Error #2044: Unhandled ioError:. text=Error #2032: Stream Error. URL: file: The code in A.swf is var request:URLRequest = new URLRequest ("B.swf"); var variables : URLVariables = new URLVariables(); variables.xml = "test.xml"; // This line causes the error 2044, else B.swf loads fine with FlashVars request.data = variables; loader.load (request); In B.swf, it is checking the Flashvars like so. It works fine from html side this.loaderInfo.parameters.xml

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  • How can I perform a normal postback on an ASP.NET page with AJAX history enabled?

    - by Nick
    I have an ASP.NET 3.5 page with an update panel and history enabled. It works fine when I perform async postbacks but I get problems when I want to perform a normal postback. The page load happens fine for the normal postback but then I get asynchronous page loads from the script manager which load the ajax history in. If I could have the ajax history not loading for the times I want to perform a normal postback then everything would be fine. Is there anyway to do this?

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  • grails Sql error

    - by Srinath
    Hi, I was getting issue wen using new Sql method in grails . import groovy.sql.Sql def datasource def organization_config = new Sql(dataSource) def orgs = organization_config.rows("select o.organizationId,o.name from organization o ") session.setAttribute("org_results", orgs); The application is running but getting these errors when restart tomcat server. SEVERE: IOException while loading persisted sessions: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: groovy.sql.GroovyRowResult java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: groovy.sql.GroovyRowResult Can any one please tell me wy this is coming . thanks in advance, sri..

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  • Using jQuery's $.getScript(), can I sense 304 Not Modified Headers?

    - by Tom
    I have an application (a widget) where I use $.getScript() on a 5 minute timer, loading a file every five minutes. I then take the contents of the file I just downloaded, and rebuild my page, so that my widget can update. Most of the time, however, the file is unchanged, and firebug displays a 304 Not Modified header every 5 minutes, as my timer executes $.getScript(). I would like to sense when the file is not modified, so that I don't use up user resources, rebuilding the page for no reason. Is it possible to obtain html headers when using $.getScript()?

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  • Does the Fetch Request do the recommended batch faulting?

    - by dontWatchMyProfile
    I'm curious. Apple says in the docs: Core Data automatically fires faults when necessary (when a persistent property of a fault is accessed). However, firing faults individually can be inefficient, and there are better strategies for getting data from the persistent store (see “Batch Faulting and Pre-fetching with the SQLite Store”). NSFetchRequest has this feature: [fetchRequest setFetchBatchSize:20]; Is this essentially performing such a batch faulting like recommended? Just to make this clear for others, faulting does not mean "turning into a fault" but it means "materializing it", just like "making a Scooby-Doo out of it". Pretty ugly wording error, in my opinion, but it's at least consistent in the docs ;)

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  • Converting excel files to python to frequency

    - by Jacob
    Essentially I've got an excel files with voltage in the first column, and time in the second. I want to find the period of the voltages, as it returns a graph of voltage in y axis and time in x axis with a periodicity, looking similar to a sine function. To find the frequency I have uploaded my excel file to python as I think this will make it easier- there may be something I've missed that will simplify this. So far in python I have: import xlrd import numpy as N import numpy.fft as F import matplotlib.pyplot as P wb = xlrd.open_workbook('temp7.xls') #LOADING EXCEL FILE wb.sheet_names() sh = wb.sheet_by_index(0) first_column = sh.col_values(1) #VALUES FROM EXCEL second_column = sh.col_values(2) #VALUES FROM EXCEL Now how do I find the frequency from this? Huge thanks to anyone who can help! Jacob

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  • Setting Priorities on Bottons

    - by JONY
    Hello Android Developers, I am trying to figure out how to set priorities on imagebutton. I want to have a layout with a bunch of Icon or buttons that can be selected either by touch, radio, or checked box. As these images are selected they are set on queue to be displayed in order of Precedence. (that is to be pre-determined). The images are displayed once the main action button is touched. Any help will be greatly appreciated. Thank you,

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  • Configuration manager for PHP

    - by Jack
    I am working on code re-factoring of configuration file loading part in PHP. Earlier I was using multiple 'ini' files but now I plan to go for single XML file which will be containing all configuration details of the project. Problem is, if somebody wants configuration file in ini or DB or anything else and not the default one (in this case XML), my code should handle that part. If somebody wants to go for other configuration option like ini, he will have to create ini file similar to my XML configuration file and my configuration manager should take care everything like parsing, storing in cache. For that I need a mechanism lets say proper interface for my configuration data where the underlying data store can be anything( XML, DB, ini etc) also I don't want it to be dependent on these underlying store and anytime in future this should be extensible to other file formats.

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  • Aptana Studio 2.0: How to checkout SVN Project to SFTP remote dir?

    - by Brian Lacy
    If you're familiar with the excellent Aptana Studio IDE, you know it's based on Eclipse. You also know it comes pre-packaged with SFTP capability. I need to work on a remote server, where I have Apache installed; SFTP is ideal for this. I've installed the Subclipse plugin, and I can access and checkout projects from the Repo. I can create a new project from SVN source, which will download all the source to my chosen workspace or a specified location. But I can't figure out a way to combine these features! I need to create a Project on a remote server via SFTP but I need to link the source to a repository. Is there any way to do this?

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  • Testing complex entities

    - by Carlos
    I've got a C# form, with various controls on it. The form controls an ongoing process, and there are many, many aspects that need to be right for the program to run correctly. Each part can be unit tested (for instance, loading some coefficients, drawing some diagnostics) but I often run into problems that are best described with an example: "If I click here, then here, then change this, then re-open the form, then click here, it crashes or produces an error" I've tried my best to use common code organisational ideas (inheritance, DRY, separation of concerns) but there never seems to be a way to test every single path, and inevitably, a form with several controls will have a huge number of ways to execute. What can I read (preferably online) that addresses this kind of issue, and is there a (non-generic) term for it. This isn't a specific problem I'm having, but one that creeps up on me, especially with WinForms.

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  • How to load xib file with attached view controller ?

    - by hib
    Hello all , I am using a xib file as a back view in coverflow component . and it is seeing nicely . The code for loading a xib file is : NSArray *array = [[NSBundle mainBundle] loadNibNamed:@"TestMine" owner:nil options:nil]; backView = [array objectAtIndex:0]; Now I want to attach a view controller with this xib without changing the current code . How can I do so ? Tell me if more details need to answer the question . Thanks .

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  • Where do you include FirePHP in Wordpress?

    - by Gnee
    I'm using require_once() in header.php to include the FirePHP library. In the page.php I'm doing the usual... $firephp = FirePHP::getInstance(true); $firephp->log($categories); Getting these errors.. 'Headers already sent....' and Cannot send log data to FirePHP. You must have Output Buffering enabled via ob_start() or output_buffering ini directive... I figured the using require_once in the template's header.php (above all HTML output) would be safe (pre header output). Guess this is not the case. Anyone have experience with this? (P.S. I tried the WP FirePHP plugin, wasn't working right)

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  • problem with jtabbedpane in java..

    - by mani
    hai, is it possible to loading of tabs in jtabedpane dyanamically in java.. that means i have frame that consinting of one tabbedpane.. in that i have 10 tabs and in each tab consting of another tabbedpane and in that each tabbedpane has 4 tabs and each tab consisting buttons and textfields...... when i login into my project the next frame takes more time to visible.... this is happens why because i have more tabbedpanes in my frame so that it takes the lot's of time to visible.. my question is.. is it possible to load tabs content dynamically when i click the tab in tabbedpane..... or is it possible to load tabbedpanes fastly......????????

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  • Replacement for PHP's __autoload function?

    - by Josh
    I have read about dynamically loading your class files when needed in a function like this: function __autoload($className) { include("classes/$className.class.php"); } $obj = new DB(); Which will automatically load DB.class.php when you make a new instance of that class, but I also read in a few articles that it is bad to use this as it's a global function and any libraries that you bring into your project that have an __autoload() function will mess it up. So does anyone know of a solution? Perhaps another way to achieve the same effect as __autoload()? Until I find a suitable solution I'll just carry on using __autoload() as it doesn't start becoming a problem until you bring in libraries and such. Thanks.

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  • How to dynamically load & unload a TinyMCE Plugin

    - by Matt Simpson
    Does anyone know if there is a way I can dynamically load and unload a TinyMCE plugin after TinyMCE has already been loaded? Specifically, I'm thinking about asking the user whether or not they wish to load the fullpage plugin using perhaps a radio button or something above TinyMCE: <input type="radio" name="fullpage" value="enabled" /> Enable Fullpage Plugin<br /> <input type="radio" name="fullpage" value="disabled" /> Disable Fullpage Plugin<br /> <textarea name="tinymce" id="tinymce">...</textarea> I suppose I could destroy the original instance and load a new config (one for enabled / one for disabled), but it seems as though there should be a more elegant way of loading and unloading plugins.

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  • Is there a reason why a submit button would fail in ie6 using jquery?

    - by kgrad
    I have a form being submit to a servlet, there is a jQuery Datepicker on the page. On some computers using ie6, for some reason the page is crashing on submit. I am getting a 404 error, but only sometimes. I have no idea why this would occur. My theory is that somehow it's bypassing the servlet, or its not loading jquery properly, or... I am at a loss. What are some reasons why this could occur on some computers? The exact version of ie6 is 6.0.2900.2180, on windows XP SP2. How can I test with this specific version?

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  • Multi-Threading in .NET

    - by AIC
    Hi all.. I wrote this program, that is supposed to read about 5000 email address and send an pre-defined html mail. I am using the background worker component. The problem is this: I have wired up the method who is supposed to send the mail. But I am calling another method that is supposed to append the body html to the salutation, like public string GiveMeFullHtml(string personname) ... "Dear Mr. John Doe" + HTML ... It seems that when it hits this method call, operation completes. IUt only sends the first mail and completes. I think because the HTML string method is on another thread or sth like that. Can you give me a little insight. Do I have to get everything done in the very same method when using multi-threading? Thanks in advance

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  • Optimizing Smart Client Performance

    - by Burt
    I have a smart client (WPF) that makes calls to the server va services (WCF). The screen I am working on holds a list of objects that it loads when the constructor is called. I am able to add, edit and delete records in the list. Typically what I am doing is after every add or delete I am reloading the entire model from the service again, there are a number off reasons for this including the fact that the data may have changed on the server between calls. This approach has proved to be a big hit on perfomance because I am loading everything sending the list up and down the wire on Add and Edit. What other options are open to me, should I only be send the required information to the server and how would I go about not reloading all the data again ever time an add or delete is performed?

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