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  • How do I fix "java.lang.OutOfMemoryError at sun.misc.Unsafe.allocateMemory(Native Method)"?

    - by Jephir
    I'm making a Java application that uses the Slick library to load images. However, on some computers, I get this error when trying to run the program: Exception in thread "main" java.lang.OutOfMemoryError at sun.misc.Unsafe.allocateMemory(Native Method) at java.nio.DirectByteBuffer.<init>(DirectByteBuffer.java:99) at java.nio.ByteBuffer.allocateDirect(ByteBuffer.java:288) at org.lwjgl.BufferUtils.createByteBuffer(BufferUtils.java:60) at org.newdawn.slick.opengl.PNGImageData.loadImage(PNGImageData.java:692) at org.newdawn.slick.opengl.CompositeImageData.loadImage(CompositeImageData.java:62) at org.newdawn.slick.opengl.CompositeImageData.loadImage(CompositeImageData.java:43) My VM options are: -Djava.library.path=lib -Xms1024M -Xmx1024M -XX:PermSize=256M -XX:MaxPermSize=256M The program loads a few large images (1024 x 768 resolution) at the beginning. Any help to solve this problem would be greatly appreciated.

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  • Escaping quotes twice in PHP

    - by Genadinik
    Hello, I have a complicated form where I first have to take some _GET parameters and obviously I have to do a mysql_real_escape_string() on them since I look stuff up in the database with them. Them problem for me is after the initial db lookup. When the user submits a form, I send them along as a _POST request and obviously have to do this mysql_real_escape_string call again just in case someone tries to hack my site with a faked form submission. Then the problem I have is the arguments are escaped twice and my queries begin to look strange like this: select field1 , field2 , from my_table where some_id = \'.$lookup_id.\' ... So the system seems to be adding \' and it is messing me up :) Also, in my other forms I have not seen such behavior. Any ideas on what may be causing this? One weird thing is that I tried to send unescaped parameters to the post, and the same problem happens. That is a clue, but not a sufficient one for me. :( Thanks, Alex

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  • Drawing rectangles on a grid in a web browser

    - by Dhruv
    I would like to create an online, simple WYSIWYG drawing editor allowing people to draw rectangular shapes. I'm thinking of a grid which the lines and points can snap on to, ensuring that the lines are strictly vertical or horizontal. I will be parsing the rectangular shapes to obtain some area calculations and compute certain things. How can I achieve the drawing ability? The new canvas tag is good but people have been telling me that IE does not support it. I found some Java applets but I have never programmed in Java before. Is there a way to do this using pure javascript or jquery? Does ASP.NET help at all? Thanks.

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  • What are the general strategies for the server of an FPS multiplayer game to update its clients?

    - by Hooray Im Helping
    A friend and I were having a discussion about how a FPS server updates the clients connected to it. We watched a video of a guy cheating in Battlefield: Bad Company 2 and saw how it highlighted the position of enemies on the screen and it got us thinking. His contention was that the server only updates the client with information that is immediately relevant to the client. I.e. the server won't send information about enemy players if they are too far away from the client or out of the client's line of sight for reasons of efficiency. He was unsure though - he brought up the example of someone hiding behind a rock, not able to see anyone. If the player were suddenly to pop up where he had three players in his line of sight, there would be a 50ms delay before they were rendered on his screen while the server transmitted the necessary information. My contention was the opposite: that the server sends the client all the information about every player and lets the client sort out what is allowed and what isn't. I figured it would actually be less expensive computationally for the server to just send everything to the client and let the client do the heavy lifting, so to speak. I also figured this is how cheat programs work - they intercept the server packets, get the location of enemies, then show them on the client's view. So the question: What are some general policies or strategies a modern first person shooter server employs to keep its clients updated?

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  • pass by reference but reference to data and not to variable

    - by dorelal
    This is psesudo code. In what programming language this is possible ? def lab(input) input = ['90'] end x = ['80'] lab(x) puts x #=> value of x has changed from ['80'] to ['90] I have written this in ruby but in ruby I get the final x value of 80 because ruby is pass-by-reference. However what is passed is the reference to the data held by x and not pointer to x itself same is true in JavaScript. So I am wondering if there is any programming language where the following is true.

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  • Reading cookie problem across directories

    - by Etienne
    This is my JavaScript code I use to create my cookie............ document.cookie = "Name=" + Name + ";expires=Friday, 31-Dec-2011 12:00:00 GMT; path/"; I create it in www.example.com/folder/file.html and it works. But I cant read the cookie from www.example.com/index.html or www.example.com/folder2/file2.html. What is wrong with my code? Thanks in advanced

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  • I want to create a mobile content for mobile users, any help?

    - by Husni Mubarak
    I am new to mobile content developing, but i want to create a mobile content that would allow mobile phone users buy have a money account on thir mobile phones, this is by using their airtime to turn into some kind of money account they will create on their phone. so they can use that account to do transactions with their mobile phone, and also they can also transfer funds from one their mobile phones to another mobile phones. How and where do i start? Help pleasssssssssssssss?

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  • Solution for distributing MANY simple network tasks?

    - by EmpireJones
    I would like to create some sort of a distributed setup for running a ton of small/simple REST web queries in a production environment. For each 5-10 related queries which are executed from a node, I will generate a very small amount of derived data, which will need to be stored in a standard relational database (such as PostgreSQL). What platforms are built for this type of problem set? The nature, data sizes, and quantities seem to contradict the mindset of Hadoop. There are also more grid based architectures such as Condor and Sun Grid Engine, which I have seen mentioned. I'm not sure if these platforms have any recovery from errors though (checking if a job succeeds). What I would really like is a FIFO type queue that I could add jobs to, with the end result of my database getting updated. Any suggestions on the best tool for the job?

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  • Why is my JavaScript function "a" not defined?

    - by 4l3x
    When I call my JavaScript function B, the javascript console in firefox said that function A is not defined, but on chrome browser if defined. And when I call function "A" in body segment: <input type="button" onclick="A()" value=" ..A.. "> , firefox said that function B is not defined? :S <html> <head> <script language="javascript" type="text/javascript"> function B(){ alert(" hi B "); document.write('<br><br><input type="button" onClick="A()" value=" ..A..">'); }; function A(){ alert(" hi A"); document.write('<br><br><input type="button" onclick="B()" value=" ..b..">'); if (window.WebCL == undefined) { alert("Unfortunately your system does not support WebCL. "); return false; } } </script> </head> <body> <input type="button" onclick="B()" value=" ..B.. "> </body> </html>

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  • I would like to learn C++, what is the first step ?

    - by Cesar
    My actual experience comes from PHP and Delphi(Borland) and recently also from Obj-C (iPhone sdk). In the past I also used Java, Python, VB 6 and some other scripting language. I would like to learn C++ because i need a standard tool for write compiled applications with good performance but i have no idea about witch environment i have to choose (Ex: Borland, Microsoft, Eclipse+MinGW, ...). Based those parameters: Most useful more opensource project or work requests Most standard not a proprietary versions Biggest community documentation, manuals, tutorials, forums... Better IDE add-ons, highlight, debug, cross platform, autocomplete... Easy setup A simple setup, to focus on learning the basics Actually I'm on OSX but I can use a VM if needed. Advices about tutorial or books are welcome. I hope it's not too generic as question.

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  • how to get game sound or how to create for iPhone

    - by iPhone Fun
    Hi all, I am having problem of getting sound. i.e. how to get good sounds for our iPhone games? or how to make some good quality sounds for iPhone game applications so that the applications will become some more attractive? There are many sites like www.freesound.org , but I am not able to get good sounds as per my choice. If any one know from where we can get good sounds or how to make such things please help me. As this will be help full to all for using sounds in the applications of iPhone or other. Thanks in advance

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  • Performance issues in android game

    - by user1446632
    I am making an android game, but however, the game is functioning like it should, but i am experiencing some performance issues. I think it has something to do with the sound. Cause each time i touch the screen, it makes a sound. I am using the standard MediaPlayer. The method is onTouchEvent() and onPlaySound1(). Could you please help me with an alternate solution for playing the sound? Thank you so much in advance! It would be nice if you also came up with some suggestions on how i can improve my code. Take a look at my code here: package com.mycompany.mygame; import java.util.ArrayList; import android.content.Context; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.media.MediaPlayer; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.MotionEvent; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.webkit.WebView; import android.widget.TextView; import android.widget.Toast; public class ExampleView extends SurfaceView implements SurfaceHolder.Callback { class ExampleThread extends Thread { private ArrayList<Parachuter> parachuters; private Bitmap parachuter; private Bitmap background; private Paint black; private boolean running; private SurfaceHolder mSurfaceHolder; private Context mContext; private Context mContext1; private Handler mHandler; private Handler mHandler1; private GameScreenActivity mActivity; private long frameRate; private boolean loading; public float x; public float y; public float x1; public float y1; public MediaPlayer mp1; public MediaPlayer mp2; public int parachuterIndexToResetAndDelete; public int canvasGetWidth; public int canvasGetWidth1; public int canvasGetHeight; public int livesLeftValue; public int levelValue = 1; public int levelValue1; public int parachutersDown; public int difficultySet; public boolean isSpecialAttackAvailible; public ExampleThread(SurfaceHolder sHolder, Context context, Handler handler) { mSurfaceHolder = sHolder; mHandler = handler; mHandler1 = handler; mContext = context; mActivity = (GameScreenActivity) context; parachuters = new ArrayList<Parachuter>(); parachuter = BitmapFactory.decodeResource(getResources(), R.drawable.parachuteman); black = new Paint(); black.setStyle(Paint.Style.FILL); black.setColor(Color.GRAY); background = BitmapFactory.decodeResource(getResources(), R.drawable.gamescreenbackground); running = true; // This equates to 26 frames per second. frameRate = (long) (1000 / 26); loading = true; mp1 = MediaPlayer.create(getContext(), R.raw.bombsound); } @Override public void run() { while (running) { Canvas c = null; try { c = mSurfaceHolder.lockCanvas(); synchronized (mSurfaceHolder) { long start = System.currentTimeMillis(); doDraw(c); long diff = System.currentTimeMillis() - start; if (diff < frameRate) Thread.sleep(frameRate - diff); } } catch (InterruptedException e) { } finally { if (c != null) { mSurfaceHolder.unlockCanvasAndPost(c); } } } } protected void doDraw(Canvas canvas) { canvas.drawRect(0, 0, canvas.getWidth(), canvas.getHeight(), black); //Draw for (int i = 0; i < parachuters.size(); i++) { canvas.drawBitmap(parachuter, parachuters.get(i).getX(), parachuters.get(i).getY(), null); parachuters.get(i).tick(); } //Remove for (int i = 0; i < parachuters.size(); i++) { if (parachuters.get(i).getY() > canvas.getHeight()) { parachuters.remove(i); onPlaySound(); checkLivesLeftValue(); checkAmountOfParachuters(); } else if(parachuters.get(i).isTouched()) { parachuters.remove(i); } else{ //Do nothing } } } public void loadBackground(Canvas canvas) { //Load background canvas.drawBitmap(background, 0, 0, black); } public void checkAmountOfParachuters() { mHandler.post(new Runnable() { @Override public void run() { if(parachuters.isEmpty()) { levelValue = levelValue + 1; Toast.makeText(getContext(), "New level! " + levelValue, 15).show(); if (levelValue == 3) { drawParachutersGroup1(); drawParachutersGroup2(); drawParachutersGroup3(); drawParachutersGroup4(); } else if (levelValue == 5) { drawParachutersGroup1(); drawParachutersGroup2(); drawParachutersGroup3(); drawParachutersGroup4(); drawParachutersGroup5(); } else if (levelValue == 7) { drawParachutersGroup1(); drawParachutersGroup2(); drawParachutersGroup3(); drawParachutersGroup4(); drawParachutersGroup5(); drawParachutersGroup6(); } else if (levelValue == 9) { //Draw 7 groups of parachuters drawParachutersGroup1(); drawParachutersGroup2(); drawParachutersGroup3(); drawParachutersGroup4(); drawParachutersGroup5(); drawParachutersGroup6(); drawParachutersGroup1(); } else if (levelValue > 9) { //Draw 7 groups of parachuters drawParachutersGroup1(); drawParachutersGroup2(); drawParachutersGroup3(); drawParachutersGroup4(); drawParachutersGroup5(); drawParachutersGroup6(); drawParachutersGroup1(); } else { //Draw normal 3 groups of parachuters drawParachutersGroup1(); drawParachutersGroup2(); drawParachutersGroup3(); } } else { //Do nothing } } }); } private void checkLivesLeftValue() { mHandler.post(new Runnable() { @Override public void run() { Log.d("checkLivesLeftValue", "lives = " + livesLeftValue); // TODO Auto-generated method stub if (livesLeftValue == 3) { //Message to display: "You lost! Log.d("checkLivesLeftValue", "calling onMethod now"); parachuters.removeAll(parachuters); onMethod(); } else if (livesLeftValue == 2) { Toast.makeText(getContext(), "Lives left=1", 15).show(); livesLeftValue = livesLeftValue + 1; Log.d("checkLivesLeftValue", "increased lives to " + livesLeftValue); } else if (livesLeftValue == 1) { Toast.makeText(getContext(), "Lives left=2", 15).show(); livesLeftValue = livesLeftValue + 1; Log.d("checkLivesLeftValue", "increased lives to " + livesLeftValue); } else { //Set livesLeftValueText 3 Toast.makeText(getContext(), "Lives left=3", 15).show(); livesLeftValue = livesLeftValue + 1; Log.d("checkLivesLeftValue", "increased lives to " + livesLeftValue); } } }); } public void onMethod() { mHandler.post(new Runnable() { @Override public void run() { try { Toast.makeText(getContext(), "You lost!", 15).show(); livesLeftValue = 0; //Tell the user that he lost: android.content.Context ctx = mContext; Intent i = new Intent(ctx, playerLostMessageActivity.class); i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); i.putExtra("KEY","You got to level " + levelValue + " And you shot down " + parachutersDown + " parachuters"); i.putExtra("levelValue", levelValue); ctx.startActivity(i); System.exit(0); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); //Exit activity and start playerLostMessageActivity Toast.makeText(getContext(), "You lost!", 15).show(); livesLeftValue = 0; //Tell the user that he lost: android.content.Context ctx = mContext; Intent i = new Intent(ctx, playerLostMessageActivity.class); i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); i.putExtra("KEY","You got to level " + levelValue + " And you shot down " + parachutersDown + " parachuters"); i.putExtra("levelValue", levelValue); System.exit(0); ctx.startActivity(i); System.exit(0); } } }); } public void onPlaySound() { try { mp1.start(); } catch (Exception e) { e.printStackTrace(); mp1.release(); } } public void onDestroy() { try { parachuters.removeAll(parachuters); mp1.stop(); mp1.release(); } catch (Exception e) { e.printStackTrace(); } } public void onPlaySound1() { try { mp2 = MediaPlayer.create(getContext(), R.raw.airriflesoundeffect); mp2.start(); } catch (Exception e) { e.printStackTrace(); mp2.release(); } } public boolean onTouchEvent(MotionEvent event) { if (event.getAction() != MotionEvent.ACTION_DOWN) releaseMediaPlayer(); x1 = event.getX(); y1 = event.getY(); checkAmountOfParachuters(); removeParachuter(); return false; } public void releaseMediaPlayer() { try { mp1.release(); } catch (Exception e) { e.printStackTrace(); } } public void removeParachuter() { try { for (Parachuter p: parachuters) { if (x1 > p.getX() && x1 < p.getX() + parachuter.getWidth() && y1 > p.getY() && y1 < p.getY() + parachuter.getHeight()) { p.setTouched(true); onPlaySound1(); parachutersDown = parachutersDown + 1; p.setTouched(false); } } } catch (Exception e) { e.printStackTrace(); } } public void initiateDrawParachuters() { drawParachutersGroup1(); } public void drawParachutersGroup1() { // TODO Auto-generated method stub //Parachuter group nr. 1 //Parachuter nr. 2 x = 75; y = 77; Parachuter p1 = new Parachuter(x, y); parachuters.add(p1); //Parachuter nr.1 x = 14; y = 28; Parachuter p = new Parachuter(x, y); parachuters.add(p); //Parachuter nr. 3 x = 250; y = 94; Parachuter p3 = new Parachuter(x, y); parachuters.add(p3); //Parachuter nr. 3 x = 275; y = 80; Parachuter p2 = new Parachuter(x, y); parachuters.add(p2); //Parachuter nr. 5 x = 280; y = 163; Parachuter p5 = new Parachuter(x, y); parachuters.add(p5); x = 125; y = 118; Parachuter p4 = new Parachuter(x, y); parachuters.add(p4); //Parachuter nr. 7 x = 126; y = 247; Parachuter p7 = new Parachuter(x, y); parachuters.add(p7); //Parachuter nr. 6 x = 123; y = 77; Parachuter p6 = new Parachuter(x, y); parachuters.add(p6); } public void drawParachutersGroup2() { // TODO Auto-generated method stub //Parachuter group nr. 2 //Parachuter nr. 5 x = 153; y = 166; Parachuter p5 = new Parachuter(x, y); parachuters.add(p5); x = 133; y = 123; Parachuter p4 = new Parachuter(x, y); parachuters.add(p4); //Parachuter nr. 7 x = 170; y = 213; Parachuter p7 = new Parachuter(x, y); parachuters.add(p7); //Parachuter nr. 6 x = 190; y = 121; Parachuter p6 = new Parachuter(x, y); parachuters.add(p6); } public void drawParachutersGroup3() { // TODO Auto-generated method stub //Parachuter group nr. 3 //Parachuter nr. 2 x = 267; y = 115; Parachuter p1 = new Parachuter(x, y); parachuters.add(p1); //Parachuter nr.1 x = 255; y = 183; Parachuter p = new Parachuter(x, y); parachuters.add(p); //Parachuter nr. 3 x = 170; y = 280; Parachuter p3 = new Parachuter(x, y); parachuters.add(p3); //Parachuter nr. 3 x = 116; y = 80; Parachuter p2 = new Parachuter(x, y); parachuters.add(p2); //Parachuter nr. 5 x = 67; y = 112; Parachuter p5 = new Parachuter(x, y); parachuters.add(p5); x = 260; y = 89; Parachuter p4 = new Parachuter(x, y); parachuters.add(p4); //Parachuter nr. 7 x = 260; y = 113; Parachuter p7 = new Parachuter(x, y); parachuters.add(p7); //Parachuter nr. 6 x = 178; y = 25; Parachuter p6 = new Parachuter(x, y); parachuters.add(p6); } public void drawParachutersGroup4() { // TODO Auto-generated method stub //Parachuter group nr. 1 //Parachuter nr. 2 x = 75; y = 166; Parachuter p1 = new Parachuter(x, y); parachuters.add(p1); //Parachuter nr.1 x = 118; y = 94; Parachuter p = new Parachuter(x, y); parachuters.add(p); //Parachuter nr. 3 x = 38; y = 55; Parachuter p3 = new Parachuter(x, y); parachuters.add(p3); //Parachuter nr. 3 x = 57; y = 18; Parachuter p2 = new Parachuter(x, y); parachuters.add(p2); //Parachuter nr. 5 x = 67; y = 119; Parachuter p5 = new Parachuter(x, y); parachuters.add(p5); x = 217; y = 113; Parachuter p4 = new Parachuter(x, y); parachuters.add(p4); //Parachuter nr. 7 x = 245; y = 234; Parachuter p7 = new Parachuter(x, y); parachuters.add(p7); //Parachuter nr. 6 x = 239; y = 44; Parachuter p6 = new Parachuter(x, y); parachuters.add(p6); } public void drawParachutersGroup5() { // TODO Auto-generated method stub //Parachuter group nr. 1 //Parachuter nr. 2 x = 59; y = 120; Parachuter p1 = new Parachuter(x, y); parachuters.add(p1); //Parachuter nr.1 x = 210; y = 169; Parachuter p = new Parachuter(x, y); parachuters.add(p); //Parachuter nr. 3 x = 199; y = 138; Parachuter p3 = new Parachuter(x, y); parachuters.add(p3); //Parachuter nr. 3 x = 22; y = 307; Parachuter p2 = new Parachuter(x, y); parachuters.add(p2); //Parachuter nr. 5 x = 195; y = 22; Parachuter p5 = new Parachuter(x, y); parachuters.add(p5); x = 157; y = 132; Parachuter p4 = new Parachuter(x, y); parachuters.add(p4); //Parachuter nr. 7 x = 150; y = 183; Parachuter p7 = new Parachuter(x, y); parachuters.add(p7); //Parachuter nr. 6 x = 130; y = 20; Parachuter p6 = new Parachuter(x, y); parachuters.add(p6); } public void drawParachutersGroup6() { // TODO Auto-generated method stub //Parachuter group nr. 1 //Parachuter nr. 2 x = 10; y = 10; Parachuter p1 = new Parachuter(x, y); parachuters.add(p1); //Parachuter nr.1 x = 20; y = 20; Parachuter p = new Parachuter(x, y); parachuters.add(p); //Parachuter nr. 3 x = 30; y = 30; Parachuter p3 = new Parachuter(x, y); parachuters.add(p3); //Parachuter nr. 3 x = 60; y = 60; Parachuter p2 = new Parachuter(x, y); parachuters.add(p2); //Parachuter nr. 5 x = 90; y = 90; Parachuter p5 = new Parachuter(x, y); parachuters.add(p5); x = 120; y = 120; Parachuter p4 = new Parachuter(x, y); parachuters.add(p4); //Parachuter nr. 7 x = 150; y = 150; Parachuter p7 = new Parachuter(x, y); parachuters.add(p7); //Parachuter nr. 6 x = 180; y = 180; Parachuter p6 = new Parachuter(x, y); parachuters.add(p6); } public void drawParachuters() { Parachuter p = new Parachuter(x, y); parachuters.add(p); Toast.makeText(getContext(), "x=" + x + " y=" + y, 15).show(); } public void setRunning(boolean bRun) { running = bRun; } public boolean getRunning() { return running; } } /** Handle to the application context, used to e.g. fetch Drawables. */ private Context mContext; /** Pointer to the text view to display "Paused.." etc. */ private TextView mStatusText; /** The thread that actually draws the animation */ private ExampleThread eThread; public ExampleView(Context context) { super(context); // register our interest in hearing about changes to our surface SurfaceHolder holder = getHolder(); holder.addCallback(this); // create thread only; it's started in surfaceCreated() eThread = new ExampleThread(holder, context, new Handler() { @Override public void handleMessage(Message m) { // mStatusText.setVisibility(m.getData().getInt("viz")); // mStatusText.setText(m.getData().getString("text")); } }); setFocusable(true); } @Override public boolean onTouchEvent(MotionEvent event) { return eThread.onTouchEvent(event); } public ExampleThread getThread() { return eThread; } @Override public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) { // TODO Auto-generated method stub } public void surfaceCreated(SurfaceHolder holder) { if (eThread.getState() == Thread.State.TERMINATED) { eThread = new ExampleThread(getHolder(), getContext(), getHandler()); eThread.start(); } else { eThread.start(); } } @Override public void surfaceDestroyed(SurfaceHolder holder) { boolean retry = true; eThread.setRunning(false); while (retry) { try { eThread.join(); retry = false; } catch (InterruptedException e) { } } } }

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  • opensourcing a website code

    - by pygabriel
    Hi! I'm writing a little website (webapp) in php+codeigniter, I'd really like to make it open source (to attract collaborators and to have a free VCS hosting). Is that a good practice? This mine security? Which are the best tools to change important data before uploading? (like config files with db names and passwords used for testing etc..)

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  • The most expressive web app programming language/framework combination?

    - by Thor
    When concerned about creating web applications, I often ask myself how I can make the code easy to read and above all; how to make it easy to maintain. There has been alot of inventions in the last couple of years with probably millions of programmers sharing these thoughts. So, lets test if we can squeeze the distilled knowledge of millions of StackOverflow users for this ultimate answer: Which language/framework combination in the world right now is the most expressive to do common tasks? Please provide a simple example of simplicity, add a link to more information about the language, and no more than one entry per language/framework combination. Specifications: "Web application" in this context refers to applications that runs on a server and outputs HTML/Javascript/CSS for rendering on a client browser. Any server operating system is ok. "Language/Framework combination" can for example be like Java+Struts or Java+SpringWeb or Perl+CGI or Java+ZK "Most expressive" in this context is meant to be minimal code to do common tasks. "Common tasks" include simple output/input, i.e. form specifying, displaying and processing, as well as simply styling of output. I am more concerned about minimality than about complete functionality. A decent language design can have great potential even though it is not complete.

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  • javascript and css loadings

    - by Mike
    I was wondering, If I have, let's say 6 javascripts includes on a page and 4-5 css includes as well on the same page, does it actually makes it optimal for the page to load if I do create one file or perhaps two and append them all together instead of having bunch of them?

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  • Drupal Multisite - Subdirectory, Shared Hosting

    - by derekerdmann
    I'm trying to set up Drupal multisite in a shared hosting environment. The main site's location looks like http://www.mysite.com/foo/bar/ and my goal is to create another site using the same database at http://www.mysite.com/foo/bar/drupal2. I've created a new folder in the sites directory called www.mysite.com.foo.bar.drupal2 and added the default.settings.php and settings.php files, configured correctly for the environment, and I've set up a symlink from the main site's root to the subdirectory, with this command: ln -s . drupal2 The problem is that when I go to http://www.mysite.com/foo/bar/drupal2, I just get the main site at http://www.mysite.com without triggering the installer. What do I need to change to get the multisite working?

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  • Using HTML Canvas for UI elements?

    - by Tower
    Hi, I have a couple of UI elements such as buttons in my web application. I was going to use CSS3's transitions to animate the transition from one background-image to another. I figured out that it's not possible with the current transitions draft at least. So, I was wondering if it would make sense to use Canvas as the button. I'm sure it can handle events, so, I see no problems here. Are there any?

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  • Scalability 101: How can I design a scalable web application using PHP?

    - by Legend
    I am building a web-application and have a couple of quick questions. From what I learnt, one should not worry about scalability when initially building the app and should only start worrying when the traffic increases. However, this being my first web-application, I am not quite sure if I should take an approach where I design things in an ad-hoc manner and later "fix" them. I have been reading stories about how people start off with an app that gets millions of users in a week or two. Not that I will face the same situation but I can't help but wonder, how do these people do it? Currently, I bought a shared hosting account on Lunarpages and that got me started in building and testing the application. However, I am interested in learning how to build the same application in a scalable-manner using the cloud, for instance, Amazon's EC2. From my understanding, I can see a couple of components: There is a load balancer that first receives requests and then decides where to route each request This request is then handled by a server replica that then processes the request and updates (if required) the database and sends back the response to the client If a similar request comes in, then a caching mechanism like memcached kicks into picture and returns objects from the cache A blackbox that handles database replication Specifically, I am trying to do the following: Setting up a load balancer (my homework revealed that HAProxy is one such load balancer) Setting up replication so that databases can be synchronized Using memcached Configuring Apache to work with multiple web servers Partitioning application to use Amazon EC2 and Amazon S3 (my application is something that will need great deal of storage) Finally, how can I avoid burning myself when using Amazon services? Because this is just a learning phase, I can probably do with 2-3 servers with a simple load balancer and replication but until I want to avoid paying loads of money accidentally. I am able to find resources on individual topics but am unable to find something that starts off from the big picture. Can someone please help me get started?

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  • Statistical analysis on large data set to be published on the web

    - by dassouki
    I have a non-computer related data logger, that collects data from the field. This data is stored as text files, and I manually lump the files together and organize them. The current format is through a csv file per year per logger. Each file is around 4,000,000 lines x 7 loggers x 5 years = a lot of data. some of the data is organized as bins item_type, item_class, item_dimension_class, and other data is more unique, such as item_weight, item_color, date_collected, and so on ... Currently, I do statistical analysis on the data using a python/numpy/matplotlib program I wrote. It works fine, but the problem is, I'm the only one who can use it, since it and the data live on my computer. I'd like to publish the data on the web using a postgres db; however, I need to find or implement a statistical tool that'll take a large postgres table, and return statistical results within an adequate time frame. I'm not familiar with python for the web; however, I'm proficient with PHP on the web side, and python on the offline side. users should be allowed to create their own histograms, data analysis. For example, a user can search for all items that are blue shipped between week x and week y, while another user can search for sort the weight distribution of all items by hour for all year long. I was thinking of creating and indexing my own statistical tools, or automate the process somehow to emulate most queries. This seemed inefficient. I'm looking forward to hearing your ideas Thanks

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  • mysqli prepare statment error?

    - by user310850
    Hi all, $mysqli = new mysqli("localhost", "root", "", "test"); $mysqli->query('PREPARE mid FROM "SELECT name FROM test_user WHERE id = ?"'); //$mysqli->query('PREPARE mid FROM "SELECT name FROM test_user" '); $res = $mysqli->query( 'EXECUTE mid 1;') or die(mysqli_error($mysqli)); while($resu = $res->fetch_object()) { echo '<br>' .$resu->name; } Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '1' at line 1 my php version is PHP Version 5.3.0 and mysql mysqlnd 5.0.5-dev - 081106 - $Revision: 1.3.2.27 $

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