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  • How to read from a method that returns a filehandle in perl?

    - by Ryan Thompson
    I have an object with a method that returns a filehandle, and I want to read from that handle. The following doesn't work, because the right angle bracket of the method call is interpreted as the closing angle bracket of the input reader: my $input = <$object->get_handle()>; That gets parsed as: my $input = ( < $object- > ) get_handle() >; which is obviously a syntax error. Is there any way I can perform a method call within an angle operator, or do I need to break it into two steps like this? my $handle = $object->get_handle(); my $input = <$handle>;

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  • Categories & singelton in cocoa

    - by Nava Carmon
    Hi, I have a SingletonClass, which has only one instance. I want to expand it and add to it a category (MoreFeatures). I created a source SingletonClass+MoreFeatures, which interface/implementation looks like that: @interface SingletonClass (MoreFeatures) - (void) feature; @end @implementation SingletonClass (MoreFeatures) - (void) feature() { } @end When I created my SingletonClass i followed the Apple's example of Singleton implementation in cocoa. This singleton resides in a project B, which is a dependency of a bigger project A. I can call for [[SingletonClass sharedInstance] foo] from a source in project A and it works in case that function foo is located in SingletonClass interface/implementation. When I try to call [[SingletonClass sharedInstance] feature] from a source in project A, I get a crash, which says that there is no method feature for class SingletonClass... Why it happens? Thanks a lot, Nava EDIT: The crash happens in a runtime. The category file source resides in project B along with a SingletonClass

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  • jQuery if checkbox is checked to toggle classes

    - by Lynx
    I am needed to change my jQuery code up. Instead of the label toggling the class and showing the icon I need it to where if the checkbox is checked to show to toggle those classes. I have tried prop and is but I couldn't get them to work properly. The reason for the change is I want to preload data into the form and if it's going to be checked those toggles need to reflect that change. http://jsfiddle.net/70fbLooL/2/ EDIT Seems to be confusion as to exactly what I am trying to do. The fiddle I provided works perfectly fine. The problem is if I want to call the form from server-side and pre-populate the form the checkbox toggles will not show that they are checked because it's based on the clicked function. I need it to be based on if the checkbox equal true or checked. That way if the value equals true from the server-side call it will toggle those classes and look like it's checked.

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  • How can i have custom fields on the posts page in wordpress?

    - by Luccas
    First I've created a home.php page to replace index.php and can add some custom fields on this new one and to have in it lastest 3 posts. On home.php page I put: <?php echo get_post_meta($post->ID, 'test', true); ?>"/> but it doesn't works cause it tries get the post id and not the id of the page. If i put 18 (id of the page) directly it works, but i want it dinamicaly: <?php echo get_post_meta(18, 'test', true); ?>"/> And this condition is not satisfied for test: if($post->post_type == 'page'){ echo 'This item is a page and the ID is: '.$post->ID; }

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  • Boost signals and passing class method

    - by Ockonal
    Hello, I've defined some signal: typedef boost::signals2::signal<void (int temp)> SomeSig; typedef SomeSig::slot_type SomeSigType; I have some class: class SomeClass { SomeClass() { SomeSig.connect(&SomeClass::doMethod); } void doMethod(const SomeSig &slot); }; And got a lot of errors: error: ‘BOOST_PP_ENUM_SHIFTED_PARAMS_M’ was not declared in this scope error: ‘T’ was not declared in this scope error: a function call cannot appear in a constant-expression error: a function call cannot appear in a constant-expression error: template argument 1 is invalid error: ‘BOOST_SIGNALS2_MISC_STATEMENT’ has not been declared error: expected identifier before ‘~’ token error: expected ‘)’ before ‘~’ token error: expected ‘;’ before ‘~’ token

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  • eclipse progress bar

    - by Dave
    Hi! I develop an eclipse plugin and I want to create an progress bar as eclipse view at bottom of the workbench window. I have an example, but this is showed only a moment. Please give me some ideas, thanks ProgressMonitorDialog dialog = new ProgressMonitorDialog(shell); dialog.run(true, true, new IRunnableWithProgress(){ public void run(IProgressMonitor monitor) { monitor.beginTask("Some nice progress message here ...", 100); // execute the task ... monitor.done(); } });

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  • Grails: Property Null error

    - by richardhell
    I've a domain called Modulo with some properties and a Controller with a method that create a object from model and save it, when execute save the shell show this error: La propiedad [{0}] de la clase [{1}] no puede ser nulo But if i set the constraint nullable to true, the error show again. I think that i should not set this cosntraint. The model is linked to a mysql table with all properties except id allow null. I think I am not doing something wrong here. Any advice?? Domain: Modulo class Modulo { String nombre String icon String url //static constraint = { // url(nullable:true) //} } Controller: Example class ExampleController { def index = { def modulo = new Modulo( nombre:'xxx', icon:'xxx' ) if (modulo.save()){ println 'ok' }else{ modulo.errors.allErrors.each { println it.defaultMessage} } } } Thanks. José

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  • How do I do a where clause in sql and return a count back?

    - by chobo2
    Hi I am using mssql and I want to make a query that returns a count back with a where clause. Like say I have a product Table ProductId ProductName Active So how would I make it I have like Select Count(*) From Product now I don't know how to filter it so it only could if Active = true; So if there are 3 active products then it would return a count of 3 even if there is a hundred rows in the db and the other 97 are only not active. so the where clause would be probably like where active = true I am not sure how to put them together though.

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  • Fastest way to put contents of Set<String> to a single String with words separated by a whitespace?

    - by Lars Andren
    I have a few Set<String>s and want to transform each of these into a single String where each element of the original Set is separated by a whitespace " ". A naive first approach is doing it like this Set<String> set_1; Set<String> set_2; StringBuilder builder = new StringBuilder(); for (String str : set_1) { builder.append(str).append(" "); } this.string_1 = builder.toString(); builder = new StringBuilder(); for (String str : set_2) { builder.append(str).append(" "); } this.string_2 = builder.toString(); Can anyone think of a faster, prettier or more efficient way to do this?

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  • When should I use static methods in a class and what are the benefits?

    - by NAVEED
    I have concept of static variables but what are the benefits of static methods in a class. I have worked on some projects but I did not make a method static. Whenever I need to call a method of a class, I create an object of that class and call the desired method. Static variable in a method holds it's value even when method is executed but accessible only in its containing method but what is the best definition of static method? Is calling the static method without creating object of that class is the only benefit of static method? What is the accessible range for static method? What is the syntax to create and calling static method in php? Thanks

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  • JQuery and WCF - GET Method passes null

    - by user70192
    Hello, I have a WCF service that accepts requests from JQuery. Currently, I can access this service. However, the parameter value is always null. Here is my WCF Service definition: [OperationContract] [WebInvoke(Method = "GET", BodyStyle = WebMessageBodyStyle.WrappedRequest, RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)] public string ExecuteQuery(string query) { // NOTE: I get here, but the query parameter is always null string results = Engine.ExecuteQuery(query); return results; } Here is my JQuery call: var searchUrl = "/services/myService.svc/ExecuteQuery"; var json = { "query": eval("\"test query\"") }; alert(json2string(json)); // Everything is correct here if (json != null) { $.ajax({ type: "GET", url: searchUrl, contentType: "application/json; charset=utf-8", data: json2string(json), dataType: "json" }); } What am I doing wrong? It seems odd that I can call the service but the parameter is always null. Thank you

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  • Intermittent "No Database Selected" in PHP/MySQL?

    - by ANE
    Have a PHP/MySQL form with a dropdown box containing a list of 350 names. When any random name is selected, sometimes it works & displays info about that name from the database, and sometimes the form gives the error "No Database Selected". Here's what I've tried, pretty much grasping at straws as I'm not a programmer: Increasing max_connections in /etc/my.cnf from 200 to 2000 (even though only 4-5 connections are made and it's a lightly used server) Changing mysql_pconnect to mysql_connect Adding the word true to this connection string: $mysql = mysql_pconnect($hostname_mysql, $username_mysql, $password_mysql, true) or trigger_error(mysql_error(),E_USER_ERROR); Changing the word require_once to require on this line: [?php require('/home/user/Connections/mysql.php'); ?] Enabling MySQL & PHP query & error logging. (no errors logged) Here is the code: [removed old bad code] Update: Working answer from Rob Apodaca below.

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  • iphone tableview & webservice

    - by Anonymous
    Hi, I have a tableview, when the user selects a row i call a webservice depending on which row is selected. my problem is i can connect to the webservice but i dont get any response from the webservice. I used soap client to test if webservice is working correctly or not. //rootviewcontroller.m - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {.... //call to webservice [self connectToWebService]; } On debugging i found that my code does not go to any of the following methods -(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *) response{} -(void) connection:(NSURLConnection *) connection didReceiveData:(NSData *) data {} -(void) connection:(NSURLConnection *) connection didFailWithError:(NSError *) error{} -(void) connectionDidFinishLoading:(NSURLConnection *) connection {} any suggestions where am i going wrong??? thanks

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  • How does polymorphism work in Python?

    - by froadie
    I'm new to Python... and coming from a mostly Java background, if that accounts for anything. I'm trying to understand polymorphism in Python. Maybe the problem is that I'm expecting the concepts I already know to project into Python. But I put together the following test code: class animal(object): "empty animal class" class dog(animal): "empty dog class" myDog = dog() print myDog.__class__ is animal print myDog.__class__ is dog From the polymorphism I'm used to (e.g. java's instanceof), I would expect both of these statements to print true, as an instance of dog is an animal and also is a dog. But my output is: False True What am I missing?

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  • How to make flash video show up under navigation element?

    - by Deshiknaves
    I know that the wmode needs to be either transparent or opaque for the video to show up under other elements on the page. I've added the wmode to the element and param in object, I still have no luck with it. <object width="400" height="225"><param name="wmode" value="transparent" /><param name="allowfullscreen" value="true" /><param name="allowscriptaccess" value="always" /><param name="movie" value="http://vimeo.com/moogaloop.swf?clip_id=10875088&amp;server=vimeo.com&amp;show_title=1&amp;show_byline=1&amp;show_portrait=0&amp;color=&amp;fullscreen=1" /><embed src="http://vimeo.com/moogaloop.swf?clip_id=10875088&amp;server=vimeo.com&amp;show_title=1&amp;show_byline=1&amp;show_portrait=0&amp;color=&amp;fullscreen=1" type="application/x-shockwave-flash" allowfullscreen="true" allowscriptaccess="always" width="400" height="225" wmode="transparent"></embed></object><p><a href="http://vimeo.com/10875088">Clutchy Hopkins - Verbal Headlock</a> from <a href="http://vimeo.com/ubiquityrecords">Ubiquity Records</a> on <a href="http://vimeo.com">Vimeo</a>.</p>

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  • problems to setup the ruby on rails facebooker plugin

    - by fenec
    i am developing a facebook application with rails and the facebooker plugin from my local machine and have problems to set it up. here is my facebooker.yml file enter code here development: api_key: myAPIKey secret_key: mySecretKey canvas_page_name: http://apps.facebook.com/rafikbennacer/ callback_url: http://207.172.82.237:3000 pretty_errors: true set_asset_host_to_callback_url: true tunnel: public_host_username: public_host: public_port: 4007 local_port: 3000 server_alive_interval: 0 I got my Callback URL accessible from the outside by doing a port forwarding on my router, everything seems to work but i still have this message error when i go to http://apps.facebook.com/rafikbennacer/: Errors while loading page from application Received HTTP error code 404 while loading http://207.172.82.237:3000/ Please try again later. We appreciate your patience as the developers of test1 and Facebook resolve this issue. Thanks! where am i wrong in my configuration , how can i trouble shoot this error? thank you

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  • How can I set Invitee in Google Calendar through Python?

    - by Dhaval dave
    I am Setting Google Calendar via python command like this def _InsertQuickAddEvent(self, content="Tennis with dddddd on 5/19/2010 4am-5:30am"): """Creates an event with the quick_add property set to true so the content is processed as quick add content instead of as an event description.""" event = gdata.calendar.CalendarEventEntry() who = whois("[email protected]") event.content = atom.Content(text=content) event.quick_add = gdata.calendar.QuickAdd(value='true'); new_event = self.cal_client.InsertEvent(event, '/calendar/feeds/default/private/full') return new_event this code is given by Google API Can any one suggest what to do to add invitee in this? Important links for that http://code.google.com/apis/calendar/data/1.0/developers_guide_python.html

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  • SDL Video Init causes Exception on Mac OS X 10.8

    - by ScrollerBlaster
    I have just ported my C++ game to OS X and the first time it ran I get the following exception when trying to call SDL_SetVideoMode. 2012-09-28 15:01:05.437 SCRAsteroids[28595:707] * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Error (1000) creating CGSWindow on line 259' * First throw call stack: ( 0 CoreFoundation 0x00007fff8b53b716 __exceptionPreprocess + 198 1 libobjc.A.dylib 0x00007fff90e30470 objc_exception_throw + 43 2 CoreFoundation 0x00007fff8b53b4ec +[NSException raise:format:] + 204 3 AppKit 0x00007fff8a26a579 _NSCreateWindowWithOpaqueShape2 + 655 4 AppKit 0x00007fff8a268d70 -[NSWindow _commonAwake] + 2002 5 AppKit 0x00007fff8a2277e2 -[NSWindow _commonInitFrame:styleMask:backing:defer:] + 1763 6 AppKit 0x00007fff8a22692f -[NSWindow _initContent:styleMask:backing:defer:contentView:] + 1568 7 AppKit 0x00007fff8a2262ff -[NSWindow initWithContentRect:styleMask:backing:defer:] + 45 8 libSDL-1.2.0.dylib 0x0000000107c228f6 -[SDL_QuartzWindow initWithContentRect:styleMask:backing:defer:] + 294 9 libSDL-1.2.0.dylib 0x0000000107c20505 QZ_SetVideoMode + 2837 10 libSDL-1.2.0.dylib 0x0000000107c17af5 SDL_SetVideoMode + 917 11 SCRAsteroids 0x0000000107be60fb _ZN11SDLGraphics4initEP6IWorldii + 291 ) libc++abi.dylib: terminate called throwing an exception Abort trap: 6 My init code looks like this: if (SDL_Init(SDL_INIT_EVERYTHING) < 0) return false; const SDL_VideoInfo *videoInfo = SDL_GetVideoInfo(); if (!videoInfo) { fprintf(stderr, "Video query failed: %s\n", SDL_GetError()); return false; } /* the flags to pass to SDL_SetVideoMode */ videoFlags = SDL_OPENGL; /* Enable OpenGL in SDL */ videoFlags |= SDL_GL_DOUBLEBUFFER; /* Enable double buffering */ videoFlags |= SDL_HWPALETTE; /* Store the palette in hardware */ /* This checks to see if surfaces can be stored in memory */ if (videoInfo->hw_available) videoFlags |= SDL_HWSURFACE; else videoFlags |= SDL_SWSURFACE; if (w == 0) { widthViewport = videoInfo->current_w; heightViewport = videoInfo->current_h; cout << "Will use full screen resolution of "; videoFlags |= SDL_FULLSCREEN; } else { cout << "Will use full user supplied resolution of "; widthViewport = w; heightViewport = h; videoFlags |= SDL_RESIZABLE; /* Enable window resizing */ } cout << widthViewport << "x" << heightViewport << "\n"; /* This checks if hardware blits can be done */ if (videoInfo->blit_hw) videoFlags |= SDL_HWACCEL; /* Sets up OpenGL double buffering */ SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); /* get a SDL surface */ surface = SDL_SetVideoMode(widthViewport, heightViewport, SCREEN_BPP, videoFlags); It gets into that last SDL call and throws the exception above. I have tried it in both full screen and resizable window mode, same thing. I build my app old school, on the command line, as opposed to using Xcode.

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  • Targeting specific material by name in the imported model

    - by Aleksander Lenart
    I'm trying to select a particular material in the imported model (via Collada loader) in Three.js. I know this can be done with the getChildByName method but it just doesn't work for me. I couldn't find any working example with this method included, either. What am I doing wrong here? loader = new THREE.ColladaLoader(); loader.load('myModel.dae', function ( collada ) { model = collada.scene; var myMaterial = model.getChildByName( 'materialName', true ); myMaterial.material = new THREE.MeshBasicMaterial( { wireframe: true } ); });

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  • how to upload a file from php to amqp

    - by user2462648
    i want to know... how can i send a file to a rabbitmq queue from php. i have gone through many examples most of them didnt work. below is a consumer producer example which is near to working. Below is a the publisher.php <?php require_once('../php-amqplib/amqp.inc'); include('../config.php'); $conn = new AMQPConnection(HOST, PORT, USER, PASS, VHOST); $channel = $conn->channel(); $channel->exchange_declare('upload-pictures','direct', false, true, false); $metadata = json_encode(array( 'image_id' => $argv[1], 'user_id' => $argv[2], 'image_path' => $argv[3] )); $msg = new AMQPMessage($metadata, array('content_type' => 'text/plain','delivery_mode' => 2)); $channel->basic_publish($msg, 'upload-pictures'); $channel->close(); $conn->close(); ?> consumer.php <?php require_once('../php-amqplib/amqp.inc'); include('../config.php'); $conn = new AMQPConnection(HOST, PORT, USER, PASS,VHOST); $channel = $conn->channel(); $queue = 'add-points'; $consumer_tag = 'consumer'; $channel->exchange_declare('upload-pictures','direct', false, true, false); $channel->queue_declare('add-points',false, true, false, false); $channel->queue_bind('add-points', 'upload-pictures'); $consumer = function($msg){}; $channel->basic_consume($queue,$consumer_tag,false,false,false,false,$consumer); ?> according to the example provided in the rabbitmq manual, i need to run consumer(php consumer.php) first in one terminal and the publisher (php publisher.php 1 2 file/path.png) in another terminal, i will get a "Adding points to user: 2" message in the consumer terminal. iam not getting this message at all. can you suggest where iam going wrong

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  • My jquery AJAX POST requests works without sending an Authenticity Token (Rails)

    - by dchua
    Hi all, Is there any provisions in rails that would allow all AJAX POST requests from the site to pass without an authenticity_token? I have a Jquery POST ajax call that calls a controller method, but I did not put any authenticity code in it and yet the call succeeds. My ApplicationController does have 'request_forgery_protection' and I've changed config.action_controller.consider_all_requests_local to false in my environments/development.rb I've also searched my code to ensure that I was not overloading ajaxSend to send out authenticity tokens. Is there some mechanism in play that disables the check? Now I'm not sure if my CSRF protection is working or not. I'm using Rails 2.3.5.

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  • Dynamic Accordion

    - by Kubi
    Hi, I need a little bit help. I want to implement my object collection with a jquery accordion. But when I should change the java script of the accordion so that I will be able to call a server side method when I click on the Header part of the accordion in my asp.net application. My javascript and jquery knowledge is very limited so any help would be greatly appreciated ! Thanks. p.s. any accordion script would do fine for me since I am able to call a server side function from client side which is the header div of the accordion

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  • how to: handle exceptions, best practices

    - by b0x0rz
    need to implement a global error handling, so maybe you can help out with the following example... i have this code: public bool IsUserAuthorizedToSignIn(string userEMailAddress, string userPassword) { // get MD5 hash for use in the LINQ query string passwordSaltedHash = this.PasswordSaltedHash(userEMailAddress, userPassword); // check for email / password / validity using (UserManagementDataContext context = new UserManagementDataContext()) { var users = from u in context.Users where u.UserEMailAdresses.Any(e => e.EMailAddress == userEMailAddress) && u.UserPasswords.Any(p => p.PasswordSaltedHash == passwordSaltedHash) && u.IsActive == true select u; // true if user found return (users.Count() == 1) ? true : false; } } and the md5 as well: private string PasswordSaltedHash(string userEMailAddress, string userPassword) { MD5 hasher = MD5.Create(); byte[] data = hasher.ComputeHash(Encoding.Default.GetBytes(userPassword + userEMailAddress)); StringBuilder stringBuilder = new StringBuilder(); for (int i = 0; i < data.Length; i++) { stringBuilder.Append(data[i].ToString("x2")); } Trace.WriteLine(String.Empty); Trace.WriteLine("hash: " + stringBuilder.ToString()); return stringBuilder.ToString(); } so, how would i go about handling exceptions from these functions? they first one is called from the Default.aspx page. the second one is only called from other functions from the class library. what is the best practice? surround code INSIDE each function with try-catch surround the FUNCTION CALL with try-catch something else?? what to do if exceptions happen? in this example: this is a user sign in, so somehow even if everything fails, the user should get some meaningful info - along the lines: sign in ok (just redirect), sign in not ok (wrong user name / password), sign in not possible due to internal problems, sorry (exception happened). for the first function i am worried if there is a problem with database access. not sure if there is anything that needs to be handled in the second one. thnx for the info. how would you do it? need specific info on this (easier for me to understand), but also general info on how to handle other tasks/functions. i looked around the internet but everyone has different things to say, so unsure what to do... will go with either most votes here, or most logicaly explained answer :) thank you.

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  • SQLAlchemy - how to map against a read-only (or calculated) property

    - by Jeff Peck
    I'm trying to figure out how to map against a simple read-only property and have that property fire when I save to the database. A contrived example should make this more clear. First, a simple table: meta = MetaData() foo_table = Table('foo', meta, Column('id', String(3), primary_key=True), Column('description', String(64), nullable=False), Column('calculated_value', Integer, nullable=False), ) What I want to do is set up a class with a read-only property that will insert into the calculated_value column for me when I call session.commit()... import datetime def Foo(object): def __init__(self, id, description): self.id = id self.description = description @property def calculated_value(self): self._calculated_value = datetime.datetime.now().second + 10 return self._calculated_value According to the sqlalchemy docs, I think I am supposed to map this like so: mapper(Foo, foo_table, properties = { 'calculated_value' : synonym('_calculated_value', map_column=True) }) The problem with this is that _calculated_value is None until you access the calculated_value property. It appears that SQLAlchemy is not calling the property on insertion into the database, so I'm getting a None value instead. What is the correct way to map this so that the result of the "calculated_value" property is inserted into the foo table's "calculated_value" column?

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  • The Math of a Jump in a 2D game.

    - by ONi
    I have been all around with this question and I can't find the correct answer! So, behold, the description of my question: I'm working in J2ME, I have my gameloop that do the following: public void run() { Graphics g = this.getGraphics(); while (running) { long diff = System.currentTimeMillis() - lastLoop; lastLoop = System.currentTimeMillis(); input(); this.level.doLogic(); render(g, diff); try { Thread.sleep(10); } catch (InterruptedException e) { stop(e); } } } so it's just a basic gameloop, the doLogic() function calls for all the logic functions of the characters in the scene and render(g, diff) calls the animateChar function of every character on scene, following this, the animChar function in the Character class sets up everything in the screen as this: protected void animChar(long diff) { this.checkGravity(); this.move((int) ((diff * this.dx) / 1000), (int) ((diff * this.dy) / 1000)); if (this.acumFrame > this.framerate) { this.nextFrame(); this.acumFrame = 0; } else { this.acumFrame += diff; } } This ensures me that everything must to move according to the time that the machine takes to go from cycle to cycle (remember it's a phone, not a gaming rig). I'm sure it's not the most efficient way to achieve this behavior so I'm totally open for criticism of my programming skills in the comments, but here my problem: When I make I character jump, what I do is that I put his dy to a negative value, say -200 and I set the boolean jumping to true, that makes the character go up, and then I have this function called checkGravity() that ensure that everything that goes up has to go down, checkGravity also checks for the character being over platforms so I will strip it down a little for the sake of your time: public void checkGravity() { if (this.jumping) { this.jumpSpeed += 10; if (this.jumpSpeed > 0) { this.jumping = false; this.falling = true; } this.dy = this.jumpSpeed; } if (this.falling) { this.jumpSpeed += 10; if (this.jumpSpeed > 200) this.jumpSpeed = 200; this.dy = this.jumpSpeed; if (this.collidesWithPlatform()) { this.falling = false; this.standing = true; this.jumping = false; this.jumpSpeed = 0; this.dy = this.jumpSpeed; } } } So, the problem is, that this function updates the dy regardless of the diff, making the characters fly like Superman in slow machines, and I have no idea how to implement the diff factor so that when a character is jumping, his speed decrement in a proportional way to the game speed. Can anyone help me fix this issue? or give me pointers on how to make a 2D Jump in J2ME the right way. Thank you very much for your time.

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