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• using a tileset with canvas

  - by Anonymous

  Yeah so I'm lost from the get-go. Alright let's say I have a big image with every tile for a 2D top-down RPG game. They're all the same width and everything. What I don't know is how would I save every individual tile from that image to their own image data for use on the canvas? Basically I want to take a big image with all my tiles, choose squares throughout it to make images out of the tiles, and store each image as a variable in an array. So, how would I do this?

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• When SET SCAN ON used after END throws error

  - by Karthik

  Hi, Im trying to use SET SCAN ON after as follows.. SET SCAN OFF; DECLARE -- declared a variable BEGIN --update statement END; SET SCAN ON; The use of SET SCAN ON; is causing the error when i try to run the script. The error captured ORA-06550: line 16, column 1: PLS-00103: Encountered the symbol "SET" 06550. 00000 - "line %s, column %s:\n%s" *Cause: Usually a PL/SQL compilation error. *Action:

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• Saving substrings using Regular Expressions

  - by user362971

  I'm new to regular expressions in Java (or any language, for that matter) and I'm wanting to do a find using them. The tricky part that I don't understand how to do is replace something inside the string that matches. For example, if the line I'm looking for is Person item6 [can {item thing [wrap]}] I'm able to write a regex that finds that line, but finding what the word "thing" is (as it may differ among different lines) is my problem. I may want to either replace that word with something else or save it in a variable for later. Is there any easy way to do this using Java's regex engine?

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• variables in batch scripts

  - by richzilla

  I'm trying to set up a batch file to automatically deploy a php app to a web server. Basically, what I want is an entirely automated process: I would just give it a revision number from the repository and it would then export the files, upload via ftp and then update deployment info at the repo host (codebase). However, I'm starting from scratch here. How would I set up a batch file to accept a variable when it was run? For example, the command myfile.bat /revision 42 should deploy revision 42 to my server. If anyone can point me in the right direction I'd appreciate it.

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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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• PS: Filter selected rows with only max values as output?

  - by David.Chu.ca

  I have a variable results ($result) of several rows of data or object like this: PS> $result | ft -auto; name value ---- ----- a 1 a 2 b 30 b 20 .... what I need to get all the rows of name and max(value) like this filtered output: PS> $result | ? |ft -auto name value ---- ----- a 2 b 30 .... Not sure what command or filters available (as ? in above) so that I can get each name and only the max value for the name out?

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• Debugging (displaying) SQL command sent to the db by SQLAlchemy

  - by morpheous

  I have an ORM class called Person, which wraps around a person table: After setting up the connection to the db etc, I run the ff statement. people = session.query(Person).all() The person table does not contain any data (as yet), so when I print the variable people, I get an empty list. I renamed the table referred to in my ORM class People, to people_foo (which does not exist). I then run the script again. I was surprised that no exception was thrown when attempting to access a table that does not exist. I therefore have the following 2 questions: How may I setup SQLAlchemy so that it propagates db errors back to the script? How may I view (i.e. print) the SQL that is being sent to the db engine If it helps, I am using PostgreSQL as the db

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• Mail php function does'nt send the email

  - by Mamadou

  Hello everybody, I have the following code wich work on some server and does not work in an other: $Name = "myname"; //senders name $email_sender = "[email protected]"; //senders e-mail adress $recipient = $email; //recipient $mail_body = "The text for the mail..."; //mail body $subject = "Subject for reviever"; //subject $header = "From: ". $Name . " <" . $email_sender . ">\r\n"; $status = mail($recipient, $subject, $mail_body, $header); print('ENVOI '. $status); the $status variable is true but i dont see any email.

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• Cast vector<T> to vector<const T>

  - by user345386

  I have a member variable of type vector (where is T is a custom class, but it could be int as well.) I have a function from which I want to return a pointer to this vector, but I don't want the caller to be able to change the vector or it's items. So I want the return type to be const vector* None of the casting methods I tried worked. The compiler keeps complaining that T is not compatible with const T. Here's some code that demonstrates the gist of what I'm trying to do; vector<int> a; const vector<const int>* b = (const vector<const int>* ) (&a); This code doesn't compile for me. Thanks in advance!

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• How to restrict this function from execution in android? Please help

  - by andyfan

  This code is present in one of this activity. I want to restrict addJoke() function from executing if the String variable new_joke is null, has no text or contains just spaces. Here is code protected void initAddJokeListeners() { // TODO m_vwJokeButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { //Implement code to add a new joke here... String new_joke=m_vwJokeEditText.getText().toString(); if(new_joke!=null&&new_joke!=""&&new_joke!=" ") { addJoke(new_joke); } } }); } I don't know why addJoke() function is getting executed even I don't enter any text in EditText field. Please help.

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• Function to set an auth_token

  - by john mossel

  In my form I have a hidden field: <input type="hidden" name="auth_token" value="<?php echo $auth_token; ?>"> This value is also stored in a session and a variable: $_SESSION['auth_token'] = hash('sha256', rand() . time() . $_SERVER['HTTP_USER_AGENT']); # TODO: put this in a function $auth_token = $_SESSION['auth_token']; When the form is submitted the two values are compared. It's a basic form token. Should this be made into two functions or just one when refactored? set_form_token() and get_form_token(), get_form_token() returning the session value, then I can compare it in my main code. What is the proper way of doing this?

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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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• Volatile keyword

  - by Tiyoal

  Say I have two threads and an object. One thread assigns the object: public void assign(MyObject o) { myObject = o; } Another thread uses the object: public void use() { myObject.use(); } Does the variable myObject have to be declared as volatile? I am trying to understand when to use volatile and when not, and this is puzzling me. Is it possible that the second thread keeps a reference to an old object in its local memory cache? If not, why not? Thanks a lot.

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• Can't modify XNA Vector components

  - by Matt H

  I have a class called Sprite, and ballSprite is an instance of that class. Sprite has a Vector2 property called Position. I'm trying to increment the Vector's X component like so: ballSprite.Position.X++; but it causes this error: Cannot modify the return value of 'WindowsGame1.Sprite.Position' because it is not a variable Is it not possible to set components like this? The tooltip for the X and Y fields says "Get or set ..." so I can't see why this isn't working.

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• PhotobucketNet photo upload

  - by n1tr0

  I have a problem with PhotobucketNet user login(I need user to login so I can upload a picture from HDD to his Photobucket account). Photobucket photobucket = new Photobucket("myapikey", "myapisecret"); photobucket.LaunchUserLogin(); // the problem happens here photobucket.RequestUserToken(); If I call RequestUserToken() it will happen immediately, so I'll get a crash cause user didn't logged in, and there is no event that's been raised after user logs in. Is there some variable(bool or something else) that I can check to see if user logged in - maybe to put it in a loop with timer? Also is their a way to know if user canceled logging in? I know that timer isn't a good solution, so if anyone has anything better as an idea, I'm open for any suggestions...

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• Caching Models in rails

  - by jules

  I have a rails application, with a model that is a kind of repository. The records stored in the DB for that model are (almost) never changed, but are read all the time. Also there is not a lot of them. I would like to store these records in cache, in a generic way. I would like to do something like acts_as_cached, but here are the issue I have: I can not find a decent documentation for acts as cached (neither can I find it's repository) I don't want to use memcached, but something simpler (static variable, or something like that). Do you have any idea of what gems I could use to do that ? Thanks

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• Hibernate won't autogenerate sequence table

  - by Jason

  I'm trying to use a sequence table to generate keys for my entities. I notice that if I just use the @GeneratedValue(strategy=GenerationType.TABLE) with no explicit generator, Hibernate will automatically create the hibernate_sequences table in my DB if it doesn't exist. This is great. However, I wanted to make some changes to the sequence table, so I created a @TableGenerator like the following: @GeneratedValue(strategy=GenerationType.TABLE, generator="vdat_seq") @TableGenerator(name="vdat_seq", table="VDAT_SEQ", pkColumnName="seq_name", valueColumnName="seq_next_val", allocationSize=1) This works fine if I manually create the VDAT_SEQ table in my schema; Hibernate won't auto-create it anymore. This causes an issue in my unit tests, since I'd rather not have to manually create a table and maintain it on our testing DB. Is there a configuration variable or some other way to get Hibernate to generate the sequence table?

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• PHP preg_match Math Function

  - by Matt

  I'm writing a script that will allow a user to input a string that is a math statement, to then be evaluated. I however have hit a roadblock. I cannot figure out how, using preg_match, to dissallow statements that have variables in them. Using this, $calc = create_function("", "return (" . $string . ");" ); $calc();, allows users to input a string that will be evaluated, but it crashes whenever something like echo 'foo'; is put in place of the variable $string.

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• Matlab Error- fplot();

  - by udsha

  >> fplot(fh,[-2 4]) ??? Undefined function or variable "e". Error in ==> myfun at 3 Y(:,2) = e(:).^x; Error in ==> fplot at 102 x = xmin; y = feval(fun,x,args{4:end}); I tried to plot two function using this m file. function Y = myfun(x) Y(:,1) = 3*x; Y(:,2) = e(:).^x;

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• How can I convert (string) timestamp to mysql datetime on Windows 32 bit PHP?

  - by user239619

  I'm attempting to call LinkedIn's API and store Network Updates. Each update has a Unix timestamp that I'm retrieving as a string variable from the REST XML response. I want to convert the string timestamp to a mysql datetime format. The date() function accepts an integer as the second argument for time to be converted. However, I'm on Windows 32 bit PHP and the integer type for this platform is limited to 2147483647. $timestamp = '1293714626675'; // sample pulled from linkedin $timestamp = (int) $timestamp; // timestamp now equals 2147483647 $mysqlDatetime = date('Y-m-d H:i:s', $timestamp); // produces incorrect time Is there a better method of creating the mysql datetime in PHP? I realize that I can convert it upon insert into MySQL however, that would require changing other dependent code.

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• log file not generated while accessing a jar having log4j support.

  - by naveen garimella

  I have a x.jar which is being used by some client y.jar. Both x.jar and y.jar are at the same package level. i have put the log4j.xml at the same package level. But the log file is never generated. Can i know why? I have tried few other options as well but no luck till now. i have added log4j-1.2.16.jar to ClassPath: variable in manifest files of both x.jar and y.jar. Put log4j.xml at the class level of y.jar which actually calls the x.jar classes. package structure is as follows: x.jar --manifest.mf has a entry ClassPath:log4j-1.2.16.jar y.jar --manifest.mf has a entry ClassPath:log4j-1.2.16.jar log4j-1.2.16.jar log4j.xml --has a RollingFileAppender. Can any one suggest whether i am missing anything?

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• Dataset Binding stored procedures update/insert/delete

  - by Jin

  Hi all, I am currently having a problem since the DB has been changed. I am using Datasets for a c# application, and there is a user management system. For the security issues, our current DB design is like user log into app. DB returns a session ID On use of any other stored procedures, a session ID must be specified. BUT, the DB didn't request session ID before. since I am using the datasets, I used update/insert/delete stored procedures with "TableAdaptor Configuration Wizard". Bind Commands to Existing Stored Procedures (choose stored procedures to call and specify any reuiqred parameters) Now, it seems like I have to specify session ID for Insert/Update/Delete stored procedures. How do I specify session ID parameter here? It seems like I have to pick one return parameter variable from a select statement. Thanks,

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• Accessing object's method within string

  - by Wild One

  Recently I was reading php documentation and found interesting note in string section: Functions, method calls, static class variables, and class constants inside {$} work since PHP 5. However, the value accessed will be interpreted as the name of a variable in the scope in which the string is defined. Using single curly braces ({}) will not work for accessing the return values of functions or methods or the values of class constants or static class variables. See www.php.net/manual/en/language.types.string.php It says, that I can't use curly syntax to get value returned by object's method call. Is it a mistake in manual or I misunderstood it, because I tried the following code and it works just fine: <?php class HelloWorld { public static function hello() { echo 'hello'; } } $a = new HelloWorld(); echo "{$a->hello()} world";

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• Programming terms - field, member, properties (C#)

  - by Petr

  Hi, I was trying to find meaning of this terms but especially due to language barrier I was not able to understand what they are used for. I assume that "field" is variable (object too?) in the class while "property" is just an object that returns specific value and cannot contain methods etc. By "member" I understand any object that is declared on the class level. But these are just my assumptions based on commented code samples where some careful programmers used "property region" etc. I would really appreciate if someone could explain it to me.

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• How to leave out some System.out/logging statements while executing java code?

  - by iamrohitbanga

  In C++ if we do not want some statements to compile into code that ships like assert function calls, we control their compilation through #ifndef preprocessor directives. How do we do this in Java? I have some System.out.println() statements for debugging which I would like to remove for the final code. one way is to make them execute conditionally under the affect of a boolean variable. Is there a better way of doing this? As I have a java swing application I can turn off the System.out.println statements without affecting the output. What is the method of doing this?

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