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  • How do I replace "this" in Java with something that works.

    - by Luke Alderton
    I'm looking to get the showGUI() method work, the compiler says "this" is not a static variable and cannot be referenced from a static context, what would I use to replace "this"? I've tried test.main (test being the package it's in). The reason I'm using the static method showGUI() is because I need the method to be called from another static method, as well as the startup() method. Below are my two main classes. public class Main extends SingleFrameApplication { @Override protected void startup() { showGUI(); } @Override protected void configureWindow(java.awt.Window root) { } public static Main getApplication() { return Application.getInstance(Main.class); } public static void main(String[] args) { launch(Main.class, args); } public static void showGUI() { show(new GUI(this)); } } public class GUI extends FrameView { public GUI(SingleFrameApplication app) { super(app); initComponents(); } private void initComponents() { //all the GUI stuff is somehow defined here } }

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  • JAVA: How do I accept input during a certain period of time only

    - by sebrock
    Im trying to do a simple game where I continually need input from players. This needs to happen during a certain time period only. Everything that is sent after that will be discarded. After the time period a new game starts. So: Start game Wait for input from all players during 10 seconds 10 secs no more input Calculate the winner and do some stuff Goto 1. I was thinking using a timer and timertask to keep track of time and maybe use a boolean variable that changes from "open" to "closed" after 10 seconds? Please give me some advise on this.

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  • How do I change the class of an object to a subclass of its current class in C++?

    - by Jared P
    I have an array of pointers to a base class, so that I can make those pointers point to (different) subclasses of the base class, but still interact with them. (really only a couple of methods which I made virtual and overloaded) I'm wondering if I can avoid using the pointers, and instead just make an array of the base class, but have some way to set the class to the subclass of my choosing. I know there must be something there specifying the class, as it needs to use that to look up the function pointer for virtual methods. By the way, the subclasses all have the same ivars and layout. Note: the design is actually based on using a template argument instead of a variable, due to performance increases, so really the abstract base class is just the interface for the subclasses, which are all the same except for their compiled code. Thanks

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  • Are there any security vulnerabilities in this PHP code?

    - by skorned
    Hi. I just got a site to manage, but am not too sure about the code the previous guy wrote. I'm pasting the login procedure below, could you have a look and tell me if there are any security vulnerabilities? At first glance, it seems like one could get in through SQL injection or manipulating cookies and the ?m= parameter. define ( 'CURRENT_TIME', time ()); / / Current time. define ( 'ONLINE_TIME_MIN', (CURRENT_TIME - BOTNET_TIMEOUT)); / / Minimum time for the status of "Online". define ( 'DEFAULT_LANGUAGE', 'en'); / / Default language. define ( 'THEME_PATH', 'theme'); / / folder for the theme. / / HTTP requests. define ( 'QUERY_SCRIPT', basename ($ _SERVER [ 'PHP_SELF'])); define ( 'QUERY_SCRIPT_HTML', QUERY_SCRIPT); define ( 'QUERY_VAR_MODULE', 'm'); / / variable contains the current module. define ( 'QUERY_STRING_BLANK', QUERY_SCRIPT. '? m ='); / / An empty query string. define ( 'QUERY_STRING_BLANK_HTML', QUERY_SCRIPT_HTML. '? m ='); / / Empty query string in HTML. define ( 'CP_HTTP_ROOT', str_replace ( '\ \', '/', (! empty ($ _SERVER [ 'SCRIPT_NAME'])? dirname ($ _SERVER [ 'SCRIPT_NAME']):'/'))); / / root of CP. / / The session cookie. define ( 'COOKIE_USER', 'p'); / / Username in the cookies. define ( 'COOKIE_PASS', 'u'); / / user password in the cookies. define ( 'COOKIE_LIVETIME', CURRENT_TIME + 2592000) / / Lifetime cookies. define ( 'COOKIE_SESSION', 'ref'); / / variable to store the session. define ( 'SESSION_LIVETIME', CURRENT_TIME + 1300) / / Lifetime of the session. ////////////////////////////////////////////////// ///////////////////////////// / / Initialize. ////////////////////////////////////////////////// ///////////////////////////// / / Connect to the database. if (! ConnectToDB ()) die (mysql_error_ex ()); / / Connecting topic. require_once (THEME_PATH. '/ index.php'); / / Manage login. if (! empty ($ _GET [QUERY_VAR_MODULE])) ( / / Login form. if (strcmp ($ _GET [QUERY_VAR_MODULE], 'login') === 0) ( UnlockSessionAndDestroyAllCokies (); if (isset ($ _POST [ 'user']) & & isset ($ _POST [ 'pass'])) ( $ user = $ _POST [ 'user']; $ pass = md5 ($ _POST [ 'pass']); / / Check login. if (@ mysql_query ( "SELECT id FROM cp_users WHERE name = '". addslashes ($ user). "' AND pass = '". addslashes ($ pass). "' AND flag_enabled = '1 'LIMIT 1") & & @ mysql_affected_rows () == 1) ( if (isset ($ _POST [ 'remember']) & & $ _POST [ 'remember'] == 1) ( setcookie (COOKIE_USER, md5 ($ user), COOKIE_LIVETIME, CP_HTTP_ROOT); setcookie (COOKIE_PASS, $ pass, COOKIE_LIVETIME, CP_HTTP_ROOT); ) LockSession (); $ _SESSION [ 'Name'] = $ user; $ _SESSION [ 'Pass'] = $ pass; / / UnlockSession (); header ( 'Location:'. QUERY_STRING_BLANK. 'home'); ) else ShowLoginForm (true); die (); ) ShowLoginForm (false); die (); ) / / Output if (strcmp ($ _GET [ 'm'], 'logout') === 0) ( UnlockSessionAndDestroyAllCokies (); header ( 'Location:'. QUERY_STRING_BLANK. 'login'); die (); ) ) ////////////////////////////////////////////////// ///////////////////////////// / / Check the login data. ////////////////////////////////////////////////// ///////////////////////////// $ logined = 0, / / flag means, we zalogininy. / / Log in session. LockSession (); if (! empty ($ _SESSION [ 'name']) & &! empty ($ _SESSION [ 'pass'])) ( if (($ r = @ mysql_query ( "SELECT * FROM cp_users WHERE name = '". addslashes ($ _SESSION [' name'])."' AND pass = ' ". addslashes ($ _SESSION [' pass']). " 'AND flag_enabled = '1' LIMIT 1 ")))$ logined = @ mysql_affected_rows (); ) / / Login through cookies. if ($ logined! == 1 & &! empty ($ _COOKIE [COOKIE_USER]) & &! empty ($ _COOKIE [COOKIE_PASS])) ( if (($ r = @ mysql_query ( "SELECT * FROM cp_users WHERE MD5 (name )='". addslashes ($ _COOKIE [COOKIE_USER ])."' AND pass = '". addslashes ($ _COOKIE [COOKIE_PASS]). " 'AND flag_enabled = '1' LIMIT 1 ")))$ logined = @ mysql_affected_rows (); ) / / Unable to login. if ($ logined! == 1) ( UnlockSessionAndDestroyAllCokies (); header ( 'Location:'. QUERY_STRING_BLANK. 'login'); die (); ) / / Get the user data. $ _USER_DATA = @ Mysql_fetch_assoc ($ r); if ($ _USER_DATA === false) die (mysql_error_ex ()); $ _SESSION [ 'Name'] = $ _USER_DATA [ 'name']; $ _SESSION [ 'Pass'] = $ _USER_DATA [ 'pass']; / / Connecting language. if (@ strlen ($ _USER_DATA [ 'language'])! = 2 | |! SafePath ($ _USER_DATA [ 'language']) | |! file_exists ( 'system / lng .'.$_ USER_DATA [' language '].' . php'))$_ USER_DATA [ 'language'] = DEFAULT_LANGUAGE; require_once ( 'system / lng .'.$_ USER_DATA [' language'].'. php '); UnlockSession ();

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  • android: getting rid of "warning: unmappable character for encoding ascii"

    - by Lo'oris
    I'm compiling using android tools without eclipse. I compile launching "ant debug" from command line. I have found many many instructions around the web about how to remove with annoying warning, but I haven't been able to make any of them work. I've tried -D option, I've tried randomly tweaking build.* files, I've tried exporting an environment variable... nothing. I guess some of these methods just don't work, and some others would work but I've been doing them incorrectly. Anything is possible and I can't stand it any more: any advice on how to do it?

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  • session expires to soon in php

    - by user1669425
    I want to extend a session time so that a session variable does not expire until after 12 hours. Problem is that after 24 minutes (default time for a session until it expires) of inactivity it still expires the session and hence gives me undefined indexes for those SESSION variables. What else do I need to do in the code below in order to be able to extend the sessions so that it does not expire on its own until 12 hours has passed: <?php ini_set('session.gc_maxlifetime',12*60*60); ini_set('session.cookie_lifetime',12*60*60); phpinfo(); session_start(); ....//rest of code below ?> in phpinfo() it states this below for gc_maxlifetime: Local Value Master Value session.gc_maxlifetime 43200 1440 session.cookie_lifetime 43200 0

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  • the use of private keyword

    - by LAT
    Hi everyone I am new to programming. I am learning Java now, there is something I am not really sure, that the use of private. Why programmer set the variable as private then write , getter and setter to access it. Why not put everything in public since we use it anyway. public class BadOO { public int size; public int weight; ... } public class ExploitBadOO { public static void main (String [] args) { BadOO b = new BadOO(); b.size = -5; // Legal but bad!! } } I found some code like this, and i saw the comment legal but bad. I don't understand why, please explain me.

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  • Should member variables of global objects be made global as well?

    - by David Wong
    I'm developing plugins in Eclipse which mandates the use of singleton pattern for the Plugin class in order to access the runtime plugin. The class holds references to objects such as Configuration and Resources. In Eclipse 3.0 plug-in runtime objects are not globally managed and so are not generically accessible. Rather, each plug-in is free to declare API which exposes the plug-in runtime object (e.g., MyPlugin.getInstance() In order for the other components of my system to access these objects, I have to do the following: MyPlugin.getInstance().getConfig().getValue(MyPlugin.CONFIGKEY_SOMEPARAMETER); , which is overly verbose IMO. Since MyPlugin provides global access, wouldn't it be easier for me to just provide global access to the objects it manages as well? MyConfig.getValue(MyPlugin.CONFIGKEY_SOMEPARAMETER); Any thoughts? (I'm actually asking because I was reading about the whole "Global variable access and singletons are evil" debates)

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  • Need JavaScript var in anchor

    - by Helto
    I'm sure this is really simple, but I need some help. I'm trying to insert a variable into an anchor in the following snippet var tablerows = '' $.each( data, function(index,row){ id = row.shift() tablerows += '<tr><td><a href="getuserimage.php?id=" target="_blank">' + row.shift() + '</a></td>' tablerows += '<td>' + row.join('</td><td>') + '</td></tr>' }) $("#users-table > tbody").html(tablerows) I'm just not sure how to get the id in there

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  • bash tools for parsing arguments

    - by BCS
    I have a bash script that uses a few variables (call them $foo and $bar). Right now the script defines them at the top with hard coded values like this: foo=fooDefault bar=barDefault .... # use $foo and $bar What I want is to be able to use the script like any of these: myscript # use all defaults myscript -foo=altFoo # use default bar myscript -bar=altBar # use default foo myscript -bar=altBar -foo=altFoo An ideal solution would allow me to just list the variable that I want to check for flags for. Is there a reasonably nice way to do this? I've seen getopt and I think it might do about 70% of what I'm looking for but I'm wondering if there is a tool or indium that builds on it or the like that gets the rest.

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  • Wrong cells values of UITableView per section

    - by androniennn
    I have a UITableView that has a different rows count in every section. I made that code to try achieving a correct result: - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier= @"channel"; ChannelsCell *cell= [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if(!cell) { cell =[[ChannelsCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } NSInteger rowsCountSection = [[arrayofChannelsCount objectAtIndex:indexPath.section] intValue];// this variable has the number of rows of every section NSUInteger pos = indexPath.section*count+ indexPath.row; cell.channelName.text=[arrayofChannelName objectAtIndex:pos]; return cell; } I'm pretty sure that's a mathematic problem. Thank you for helping.

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  • Specifying routes by subdomain in Express using vhost middleware

    - by user730569
    I'm using the vhost express/connect middleware and I'm a bit confused as to how it should be used. I want to have one set of routes apply to hosts with subdomains, and another set to apply for hosts without subdomains. In my app.js file, I have var app = express.createServer(); app.use...(middlware)... app.use(express.vhost('*.host', require('./domain_routing')("yes")); app.use(express.vhost('host', require('./domain_routing')("no")); app.use...(middlware)... app.listen(8000); and then in domain_routing.js: module.exports = function(subdomain){ var app = express.createServer(); require('./routes')(app, subdomain); return app; } and then in routes.js I plan to run sets of routes, dependent on the subdomain variable passed in is "yes" or "no". Am I on the right track or is this not how you use this middleware?

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  • How to write a regular expression for "everything between X and Y" for use with preg_replace

    - by pg
    I want to take a variable called $encoded_str and and remove cd1, CD1 and anything between the first 'l' and the last blank space. So for example "lp6 id4 STRINGcd1" would return "STRING". I'm using PHP 4 for now so I can't use str_ireplace, I have this: $encoded_str=str_replace('CD1','',$encoded_str); $encoded_str=str_replace('cd1','',$encoded_str); $encoded_str=preg_replace('X','',$encoded_str); I've RTFM for preg_replace but am a bit confused. What should I replace the X with and can you suggest a decent introductory primer for writing regular expressions?

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  • Declared Properties and assigning values with self

    - by Shaun Budhram
    I understand how declared properties work - I just need a clarification on when Objective C is using the accessor method vs. when it is not. Say I have a property declared using retain: @property (nonatomic, retain) NSDate *date; ... and later... @synthesize date If I say: date = x Is that calling the accessor method? Or is it just setting the variable? self.date = x This seems to call the accessor method (I think but I'm not sure, since it seems like the retain count is increasing). Can anyone clarify this issue? I'm curious because i have some variables that seem to become invalid before I need them (and I have to specifically call retain), and I suspect this is why.

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  • Django m2m adding field in the secondary table

    - by dana
    I have a model in wich i'm using m2m Django ORM feature, in order to create an aditional table to hold my 'classrom members'. My problem is: the membership to a classroom must be accepted by the invited one, so i need a boolean field :1=accepted, 0=refused/unseen yet. How can i include this boolean variable in the aditionally generated classroom_membership (and NOT in the primary created Classroom table)? class Classroom(models.Model): user = models.ForeignKey(User, related_name = 'classroom_creator') classname = models.CharField(max_length=140, unique = True) date = models.DateTimeField(auto_now=True) open_class = models.BooleanField(default=True) #domain = models.EnumField() members = models.ManyToManyField(User,related_name="list of invited members") Thanks in advance!!

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  • Special simple random number generator

    - by psihodelia
    How to create a function, which on every call generates a random integer number? This number must be most random as possible (according to uniform distribution). It is only allowed to use one static variable and at most 3 elementary steps, where each step consists of only one basic arithmetic operation of arity 1 or 2. Example: int myrandom(void){ static int x; x = some_step1; x = some_step2; x = some_step3; return x; } Basic arithmetic operations are +,-,%,and, not, xor, or, left shift, right shift, multiplication and division. Of course, no rand(), random() or similar staff is allowed.

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  • pthread_exit return value

    - by Manty
    This is surprising for me. void * thread_func(void *arg) { pthread_exit(&ret); } int main(void) { pthread_t thr; int *exit_status; pthread_create(&thr, NULL, thread_func, NULL); sleep(2); pthread_join(thr, (void **)&exit_status); printf("value of exit status - %d\n", *exit_status); ret = 20; pthread_join(thr, (void **)&exit_status); printf("value of exit status - %d\n", *exit_status); return 0; } The output is value of exit status - 50 value of exit status - 20 I was expecting both the times the exit_status would be the actual exit value(50 in my case) of the thread. Instead it is just returning the value of the global variable which I used for pthread_exit. Is it not a bug?

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  • int i vs int index etc. Which one is better?

    - by Earlz
    Coming from a C background I've always used int i for generic loop variables. Of course in big nested loops or other complex things I may use a descriptive name but which one had you rather see? int i; for(i=0;i<Controls.Count;i++){ DoStuff(Controls[i]); } or int index; for(index=0;index<Controls.Count;index++){ DoStuff(Controls[index]); } In the current project I am working on there are both of these styles and index being replaced by ndx. Which one is better? Is the i variable too generic? Also what about the other C style names? i, j, k Should all of these be replaced by actual descriptive variables?

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  • How is the Trac Project List page customised?

    - by CnTwo
    We've been using Trac for a while now for our developers only. However we are now opening it up for our (internal) clients. We have a project listing page (based on the default one that comes with Trac). What we'd like to do, is display more information about the project than what is currently available. I have searched google and here, to see if I can find how to get more information. There seems to be a variable called $project which has .name, .description and .href as attributes. Is there somewhere, a list of the attributes available? Or perhaps a different solution altogether that will allow us to display more information on the project list page. Such as the number of open tickets etc.

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  • C# eval equivalent?

    - by Adhip Gupta
    I can do an eval("something()"); to execute the code dynamically in JavaScript. Is there a way for me to do the same thing in C#? What I am exactly trying to do is that I have an integer variable (say i) and I have multiple properties by the names: "Property1","Property2","Property3" etc. Now, I want to perform some operations on the " Propertyi " property depending on the value of i. This is really simple with Javascript. Is there any way to do this with C#? Edit: Oh, and I am using C# 2.0

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  • Managing test data for Junit tests.

    - by nobody
    Hi, We are facing one problem in managing test data(xmls which is used to create mock objects). The data which we have currently has been evolved over a long period of time. Each time we add a new functionality or test case we add new data to test that functionality. Now, the problem is when the business requirement changes the format( like length or format of a variable) or any change which the test data doesn't support , we need to change the entire test data which is 100s of MBs in size. Could anyone suggest a better method or process to overcome this problem? Any suggestion would be appreciated.

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  • Extend PickerViews Component while touching

    - by vikingosegundo
    I have a UIPickerView with a variable number of components to display. In its contoller i have this -pickerView:withForComponent: - (CGFloat)pickerView:(UIPickerView *)pv widthForComponent:(NSInteger)component { CGFloat f; if (component == 0) { f = 30; } else { if ([componentsData count]>2) { f = 260.0/([componentsData count]-1); } else{ f = 260.0; } } return f; } this works fine if I call [pickerView reloadAllComponents], but how could I extend a components width if it is touched (and of course shrink all others)?

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  • How to define an array inside a function in C?

    - by Arunav Dev
    So in my source file I have the folowin function: void update(state* old_state, state* measurement, uint32_t size) { state new_state[size]; //some function using measurement and old_state and returning the result in newstate arm_fadd_32(measurement,old_state,newstate,size); // rest of the code } Now the compiler throws an error saying that error#28:expression must have a constant value. I think it's due to the fact that even though inside the method the size local variable is not changing the compiler is expecting a constant while defining the size. I have tried the following: int const a = size; and then tried to reinitialize it says constant value is not known. I did some research in internet and it appears that there is no easier way without using malloc, which I don't want to since I am using the code for some embedded application. Is there a way to avoid this problem without really using malloc? Thanks in advance guys!

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  • Dynamic creation of a pointer function in c++

    - by Liberalkid
    I was working on my advanced calculus homework today and we're doing some iteration methods along the lines of newton's method to find solutions to things like x^2=2. It got me thinking that I could write a function that would take two function pointers, one to the function itself and one to the derivative and automate the process. This wouldn't be too challenging, then I started thinking could I have the user input a function and parse that input (yes I can do that). But can I then dynamically create a pointer to a one-variable function in c++. For instance if x^2+x, can I make a function double function(double x){ return x*x+x;} during run-time. Is this remotely feasible, or is it along the lines of self-modifying code?

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  • Scalling connected lines

    - by Hristo
    Hello, I have some kind of a shape consisting of vertical, horizontal and diagonal lines. I have starting X,Y and ending X,Y (this is my input - just 2 points defining a line) of each line and I would like to make the whole shape scalable (just by changing the value of a scale ratio variable), so that I can still preserve the proper connection of the lines and the proportions as well. Just for getting a better idea of what I mean: it'd be as if I had the same lines in a vector editor. Would that be possible with an algorithm, and could you please, give me another possible solution if there is no such algorithm ? Thank you very much in advance!

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