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  • Basic Use of ApplyImpulse

    - by nycynik
    I am trying to apply a force to a bunch of b2_dynamicBodys, but it seems to only work for a random number of items and then stops with an error. //create some items to move bodyDef.type = b2Body.b2_dynamicBody; for(var i = 0; i < 5; ++i) { fixDef.shape = new b2PolygonShape; fixDef.shape.SetAsBox(1,1); fixDef.friction = 1; fixDef.restitution = .1; bodyDef.position.x = Math.random() * 10; bodyDef.position.y = Math.random() * 10; bodyDef.linearDamping=1; bodyDef.angularDamping=.8; itemsArray.push(world.CreateBody(bodyDef).CreateFixture(fixDef)); // store for later } then i try to apply a force later with: angle = 20; for (var xIdx=0; xIdx<itemArray.length; xIdx++) { itemsArray[xIdx].GetBody().ApplyImpulse(new b2Vec2(50*Math.cos(angle*Math.PI/180),50*Math.sin(angle*Math.PI/180));); } the error I receive is TypeError: 'undefined' is not an object (evaluating 'c.x') Is there something wrong with saving the items for later use when I am creating them? Does anyone know what is causing this.

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  • Spring <jee:remote-slsb> and JBoss AS7 - No EJB receiver available for handling

    - by Lech Glowiak
    I have got @Remote EJB on JBoss AS 7, available by name java:global/RandomEjb/DefaultRemoteRandom!pl.lechglowiak.ejbTest.RemoteRandom. Standalone client is Spring application that uses <jee:remote-slsb> bean. When trying to use that bean I get java.lang.IllegalStateException: EJBCLIENT000025: No EJB receiver available for handling [appName:, moduleName:RandomEjb, distinctName:] combination for invocation context org.jboss.ejb.client.EJBClientInvocationContext@1a89031. Here is relevant part of applicationContext.xml: <jee:remote-slsb id="remoteRandom" jndi-name="RandomEjb/DefaultRemoteRandom!pl.lechglowiak.ejbTest.RemoteRandom" business-interface="pl.lechglowiak.ejbTest.RemoteRandom" <jee:environment> java.naming.factory.initial=org.jboss.naming.remote.client.InitialContextFactory java.naming.provider.url=remote://localhost:4447 jboss.naming.client.ejb.context=true java.naming.security.principal=testuser java.naming.security.credentials=testpassword </jee:environment> </jee:remote-slsb> <bean id="remoteClient" class="pl.lechglowiak.RemoteClient"> <property name="remote" ref="remoteRandom" /> </bean> RemoteClient.java public class RemoteClient { private RemoteRandom random; public void setRemote(RemoteRandom random){ this.random = random; } public Integer callRandom(){ try { return random.getRandom(100); } catch (Exception e) { e.printStackTrace(); return null; } } } My jboss client jar: org.jboss.as jboss-as-ejb-client-bom 7.1.2.Final pom pl.lechglowiak.ejbTest.RemoteRandom is available for client application classpath. jndi.properties contains exact properties as in <jee:environment> of <jee:remote-slsb>. Such code runs without exception: Context ctx2 = new InitialContext(); RemoteRandom rr = (RemoteRandom) ctx2.lookup("RandomEjb/DefaultRemoteRandom!pl.lechglowiak.ejbTest.RemoteRandom"); System.out.println(rr.getRandom(10000)); But this: ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml"); RemoteClient client = ctx.getBean("remoteClient", RemoteClient.class); System.out.println(client.callRandom()); ends with exception: java.lang.IllegalStateException: EJBCLIENT000025: No EJB receiver available for handling [appName:, moduleName:RandomEjb, distinctName:] combination for invocation context org.jboss.ejb.client.EJBClientInvocationContext@1a89031. jboss.naming.client.ejb.context=true is set. Do you have any idea what am I setting wrong in <jee:remote-slsb>?

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  • How do you implement position-sensitive zooming inside a JScrollPane?

    - by tucuxi
    I am trying to implement position-sensitive zooming inside a JScrollPane. The JScrollPane contains a component with a customized 'paint' that will draw itself inside whatever space it is allocated - so zooming is as easy as using a MouseWheelListener that resizes the inner component as required. But I also want zooming into (or out of) a point to keep that point as central as possible within the resulting zoomed-in (or -out) view (this is what I refer to as 'position-sensitive' zooming), similar to how zooming works in google maps. I am sure this has been done many times before - does anybody know the "right" way to do it under Java Swing?. Would it be better to play with Graphic2D's transformations instead of using JScrollPanes? Sample code follows: package test; import java.awt.*; import java.awt.event.*; import java.awt.geom.*; import javax.swing.*; public class FPanel extends javax.swing.JPanel { private Dimension preferredSize = new Dimension(400, 400); private Rectangle2D[] rects = new Rectangle2D[50]; public static void main(String[] args) { JFrame jf = new JFrame("test"); jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); jf.setSize(400, 400); jf.add(new JScrollPane(new FPanel())); jf.setVisible(true); } public FPanel() { // generate rectangles with pseudo-random coords for (int i=0; i<rects.length; i++) { rects[i] = new Rectangle2D.Double( Math.random()*.8, Math.random()*.8, Math.random()*.2, Math.random()*.2); } // mouse listener to detect scrollwheel events addMouseWheelListener(new MouseWheelListener() { public void mouseWheelMoved(MouseWheelEvent e) { updatePreferredSize(e.getWheelRotation(), e.getPoint()); } }); } private void updatePreferredSize(int n, Point p) { double d = (double) n * 1.08; d = (n > 0) ? 1 / d : -d; int w = (int) (getWidth() * d); int h = (int) (getHeight() * d); preferredSize.setSize(w, h); getParent().doLayout(); // Question: how do I keep 'p' centered in the resulting view? } public Dimension getPreferredSize() { return preferredSize; } private Rectangle2D r = new Rectangle2D.Float(); public void paint(Graphics g) { super.paint(g); g.setColor(Color.red); int w = getWidth(); int h = getHeight(); for (Rectangle2D rect : rects) { r.setRect(rect.getX() * w, rect.getY() * h, rect.getWidth() * w, rect.getHeight() * h); ((Graphics2D)g).draw(r); } } }

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  • Memory efficient int-int dict in Python

    - by Bolo
    Hi, I need a memory efficient int-int dict in Python that would support the following operations in O(log n) time: d[k] = v # replace if present v = d[k] # None or a negative number if not present I need to hold ~250M pairs, so it really has to be tight. Do you happen to know a suitable implementation (Python 2.7)? EDIT Removed impossible requirement and other nonsense. Thanks, Craig and Kylotan! To rephrase. Here's a trivial int-int dictionary with 1M pairs: >>> import random, sys >>> from guppy import hpy >>> h = hpy() >>> h.setrelheap() >>> d = {} >>> for _ in xrange(1000000): ... d[random.randint(0, sys.maxint)] = random.randint(0, sys.maxint) ... >>> h.heap() Partition of a set of 1999530 objects. Total size = 49161112 bytes. Index Count % Size % Cumulative % Kind (class / dict of class) 0 1 0 25165960 51 25165960 51 dict (no owner) 1 1999521 100 23994252 49 49160212 100 int On average, a pair of integers uses 49 bytes. Here's an array of 2M integers: >>> import array, random, sys >>> from guppy import hpy >>> h = hpy() >>> h.setrelheap() >>> a = array.array('i') >>> for _ in xrange(2000000): ... a.append(random.randint(0, sys.maxint)) ... >>> h.heap() Partition of a set of 14 objects. Total size = 8001108 bytes. Index Count % Size % Cumulative % Kind (class / dict of class) 0 1 7 8000028 100 8000028 100 array.array On average, a pair of integers uses 8 bytes. I accept that 8 bytes/pair in a dictionary is rather hard to achieve in general. Rephrased question: is there a memory-efficient implementation of int-int dictionary that uses considerably less than 49 bytes/pair?

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  • SSL Authentication with Certificates: Should the Certificates have a hostname?

    - by sixtyfootersdude
    Summary JBoss allows clients and servers to authenticate using certificates and ssl. One thing that seems strange is that you are not required to give your hostname on the certificate. I think that this means if Server B is in your truststore, Sever B can pretend to be any server that they want. (And likewise: if Client B is in your truststore...) Am I missing something here? Authentication Steps (Summary of Wikipeida Page) Client Server ================================================================================================= 1) Client sends Client Hello ENCRIPTION: None - highest TLS protocol supported - random number - list of cipher suites - compression methods 2) Sever Hello ENCRIPTION: None - highest TLS protocol supported - random number - choosen cipher suite - choosen compression method 3) Certificate Message ENCRIPTION: None - 4) ServerHelloDone ENCRIPTION: None 5) Certificate Message ENCRIPTION: None 6) ClientKeyExchange Message ENCRIPTION: server's public key => only server can read => if sever can read this he must own the certificate - may contain a PreMasterSecerate, public key or nothing (depends on cipher) 7) CertificateVerify Message ENCRIPTION: clients private key - purpose is to prove to the server that client owns the cert 8) BOTH CLIENT AND SERVER: - use random numbers and PreMasterSecret to compute a common secerate 9) Finished message - contains a has and MAC over previous handshakes (to ensure that those unincripted messages did not get broken) 10) Finished message - samething Sever Knows The client has the public key for the sent certificate (step 7) The client's certificate is valid because either: it has been signed by a CA (verisign) it has been self-signed BUT it is in the server's truststore It is not a replay attack because presumably the random number (step 1 or 2) is sent with each message Client Knows The server has the public key for the sent certificate (step 6 with step 8) The server's certificate is valid because either: it has been signed by a CA (verisign) it has been self-signed BUT it is in the client's truststore It is not a replay attack because presumably the random number (step 1 or 2) is sent with each message Potential Problem Suppose the client's truststore has certs in it: Server A Server B (malicous) Server A has hostname www.A.com Server B has hostname www.B.com Suppose: The client tries to connect to Server A but Server B launches a man in the middle attack. Since server B: has a public key for the certificate that will be sent to the client has a "valid certificate" (a cert in the truststore) And since: certificates do not have a hostname feild in them It seems like Server B can pretend to be Server A easily. Is there something that I am missing?

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  • C# A simple Hangman game

    - by Radostin Angelov
    I'm trying to create a simple Hangman game and i have gotten so far, to make it read all words from a text file, but I don't know how to make the code work for every single word. I have another project, working with 3/4 words but with repeating nested if statements. I want to make it as shorter as possible. This is the code i have so far : using System; using System.Linq; class Program { static void Main() { string[] words = System.IO.File.ReadAllLines(@"C:\Users\ADMIN\Desktop\Letters\Letters.txt"); int LengthOfArray = words.Length; Random rnd = new Random(); int random = rnd.Next(1, 3); char[] letters = words[random].ToCharArray(); bool WordIsHidden = true; char hiddenChar = '_'; char GuessedLetter = hiddenChar; var retry = true; while (retry = true) { Console.WriteLine(letters); letters = GuessedLetter.ToString().ToCharArray(); for (int i = 1; i <= LengthOfArray; i++) { Console.Write("{0} ", GuessedLetter); } Console.WriteLine("Enter a letter!"); char letter = char.Parse(Console.ReadLine()); if (words[random].Contains<char>(letter)) { WordIsHidden = false; GuessedLetter = letter; Console.Write(letters); } else { if (WordIsHidden == true) { Console.Write("You guessed wrong!"); } } } } } Also I'm trying to make the game show each letter, the user has guessed on it's corresponding position, but now the letter is one line higher than the rest of the word and it's not in it's right position. Edited: Here is the result : cat ___Enter a letter! a __ aaaEnter a letter! t aa tttEnter a letter! IF anyone have a clue for where does this come from and how can I fix it, any help will be greatly appreciated.

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  • Dark Sun Dispatch 001

    - by Chris Williams
    If you aren't into tabletop (aka pen & paper) RPGs, you might as well click to the next post now... Still here? Awesome. I've recently started running a new D&D 4.0 Dark Sun campaign. If you don't know anything about Dark Sun, here's a quick intro: The campaign take place on the world of Athas, formerly a lush green world that is now a desert wasteland. Forests are rare in the extreme, as is water and metal. Coins are made of ceramic and weapons are often made of hardened wood, bone or obsidian. The green age of Athas was centuries ago and the current state was brought about through the reckless use of sorcerous magic. (In this world, you can augment spells by drawing on the life force of the world & people around you. This is called defiling. Preserving magic draws upon the casters life force and does not damage the surrounding world, but it isn't as powerful.) Humans are pretty much unchanged, but the traditional fantasy races have changed quite a bit. Elves don't live in the forest, they are shifty and untrustworthy desert traders known for their ability to run long distances through the wastes. Halflings are not short, fat, pleasant little riverside people. Instead they are bloodthirsty feral cannibals that roam the few remaining forests and ride reptilians beasts akin to raptors. Gnomes are extinct, as are orcs. Dwarves are mostly farmers and gladiators, and live out in the sun instead of staying under the mountains. Goliaths are half-giants, not known for their intellect. Muls are a Dwarf & Human crossbreed that displays the best traits of both races (human height and dwarven stoutness.) Thri-Kreen are sentient mantis people that are extremely fast. Most of the same character classes are available, with a few new twists. There are no divine characters (such as Priests, Paladins, etc) because the gods are gone. Nobody alive today can remember a time when they were still around. Instead, some folks worship the elemental forces (although they don't give out spells.) The cities are all ruled by Sorcerer King tyrants (except one city: Tyr) who are hundreds of years old and still practice defiling magic whenever they please. Serving the Sorcerer Kings are the Templars, who are also defilers and psionicists. Crossing them is as bad, in many cases, as crossing the Kings themselves. Between the cities you have small towns and trading outposts, and mostly barren desert with sometimes 4-5 days on foot between towns and the nearest oasis. Being caught out in the desert without adequate supplies and protection from the elements is pretty much a death sentence for even the toughest heroes. When you add in the natural (and unnatural) predators that roam the wastes, often in packs, most people don't last long alone. In this campaign, the adventure begins in the (small) trading fortress of Altaruk, a couple weeks walking distance from the newly freed city of Tyr. A caravan carrying trade goods from Altaruk has not made it to Tyr and the local merchant house has dispatched the heroes to find out what happened and to retrieve the goods (and drivers) if possible. The unlikely heroes consist of a human shaman, a thri-kreen monk, a human wizard, a kenku assassin and a (void aspect) genasi swordmage. Gathering up supplies and a little liquid courage, they set out into the desert and manage to find the northbound tracks of the wagon. Shortly after finding the tracks, they are ambushed by a pack of silt-runners (small lizard people with very large teeth and poisoned pointy spears.) The party makes short work of the creatures, taking a few minor wounds in the process. Proceeding onward without resting, they find the remains of the wagon and manage to sneak up on a pack of Kruthiks picking through the rubble and spilled goods. Unfortunately, they failed to take advantage of the opportunity and had a hard fight ahead of them. The party defeated the kruthiks, but took heavy damage (and almost lost a couple of their own) in the process. Once the kruthiks were dispatched, they followed a set of tracks further north to a ruined tower...

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  • The theory of evolution applied to software

    - by Michel Grootjans
    I recently realized the many parallels you can draw between the theory of evolution and evolving software. Evolution is not the proverbial million monkeys typing on a million typewriters, where one of them comes up with the complete works of Shakespeare. We would have noticed by now, since the proverbial monkeys are now blogging on the Internet ;-) One of the main ideas of the theory of evolution is the balance between random mutations and natural selection. Random mutations happen all the time: millions of mutations over millions of years. Most of them are totally useless. Some of them are beneficial to the evolved species. Natural selection favors the beneficially mutated species. Less beneficial mutations die off. The mutated rabbit doesn't have to be faster than the fox. It just has to be faster than the other rabbits.   Theory of evolution Evolving software Random mutations happen all the time. Most of these mutations are so bad, the new species dies off, or cannot reproduce. Developers write new code all the time. New ideas come up during the act of writing software. The really bad ones don't get past the stage of idea. The bad ones don't get committed to source control. Natural selection favors the beneficial mutated species Good ideas and new code gets discussed in group during informal peer review. Less than good code gets refactored. Enhanced code makes it more readable, maintainable... A good set of traits makes the species superior to others. It becomes widespread A good design tends to make it easier to add new features, easier to understand the current implementations, easier to optimize for performance...thus superior. The best designs get carried over from project to project. They appear in blogs, articles and books about principles, patterns and practices.   Of course the act of writing software is deliberate. This can hardly be called random mutations. Though it sometimes might seem that code evolves through a will of its own ;-) Does this mean that evolving software (evolution) is better than a big design up front (creationism)? Not necessarily. It's a false idea to think that a project starts from scratch and everything evolves from there. Everyone carries his experience of what works and what doesn't. Up front design is necessary, but is best kept simple and minimal, just enough to get you started. Let the good experiences and ideas help to drive the process, whether they come from you or from others, from past experience or from the most junior developer on your team. Once again, balance is the keyword. Balance design up front with evolution on a daily basis. How do you know what balance is right? Through your own experience of what worked and what didn't (here's evolution again). Notes: The evolution of software can quickly degenerate without discipline. TDD is a discipline that leaves little to chance on that part. Write your test to describe the new behavior. Write just enough code to make it behave as specified. Refactor to evolve the code to a higher standard. The responsibility of good design rests continuously on each developers' shoulders. Promiscuous pair programming helps quickly spreading the design to the whole team.

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  • Referencing movie clips from within an actionscript class

    - by Ant
    Hi all, I have been given the task of adding a scoring system to various flash games. This simply involves taking input, adding functionality such as pausing and replaying and then outputting the score, time left etc. at the end. I've so far successfully edited two games. Both these games used the "actions" code on frames. The latest game I'm trying to do uses an actionscript class which makes it both easier and harder. I'm not very adept at flash at all, but I've worked it out so far. I've added various movie clips that are to be used for displaying the pause screen background, buttons for replaying etc. I've been showing and hiding these using: back._visible = true; //movie clip, instance of back (back.png) I doubt it's best practice, but it's quick and has been working. However, now with the change of coding style to classes, this doesn't seem to work. I kinda understand why, but I'm now unsure how to hide/show these elements. Any help would be greatly appreciated :) I've attached the modified AS. class RivalOrbs extends MovieClip { var infinite_levels, orbs_start, orbs_inc, orbs_per_level, show_timer, _parent, one_time_per_level, speed_start, speed_inc_percent, max_speed, percent_starting_on_wrong_side, colorize, colors, secs_per_level; function RivalOrbs() { super(); mc = this; this.init(); } // End of the function function get_num_orbs() { if (infinite_levels) { return (orbs_start + (level - 1) * orbs_inc); } else if (level > orbs_per_level.length) { return (0); } else { return (orbs_per_level[level - 1]); } // end else if } // End of the function function get_timer_str(secs) { var _loc2 = Math.floor(secs / 60); var _loc1 = secs % 60; return ((_loc2 > 0 ? (_loc2) : ("0")) + ":" + (_loc1 >= 10 ? (_loc1) : ("0" + _loc1))); } // End of the function function frame() { //PLACE PAUSE CODE HERE if (!Key.isDown(80) and !Key.isDown(Key.ESCAPE)) { _root.offKey = true; } else if (Key.isDown(80) or Key.isDown(Key.ESCAPE)) { if (_root.offKey and _root.game_mode == "play") { _root.game_mode = "pause"; /* back._visible = true; btn_resume._visible = true; btn_exit._visible = true; txt_pause._visible = true; */ } else if (_root.offKey and _root.game_mode == "pause") { _root.game_mode = "play"; } _root.offKey = false; } if (_root.game_mode == "pause" or paused) { return; } else { /* back._visible = false; btn_resume._visible = false; btn_exit._visible = false; txt_pause._visible = false; */ } if (show_timer && total_secs != -1 || show_timer && _parent.timesup) { _loc7 = total_secs - Math.ceil((getTimer() - timer) / 1000); var diff = oldSeconds - (_loc7 + additional); if (diff > 1) additional = additional + diff; _loc7 = _loc7 + additional; oldSeconds = _loc7; trace(oldSeconds); mc.timer_field.text = this.get_timer_str(Math.max(0, _loc7)); if (_loc7 <= -1 || _parent.timesup) { if (one_time_per_level) { _root.gotoAndPlay("Lose"); } else { this.show_dialog(false); return; } // end if } // end if } // end else if var _loc9 = _root._xmouse; var _loc8 = _root._ymouse; var _loc6 = {x: _loc9, y: _loc8}; mc.globalToLocal(_loc6); _loc6.y = Math.max(-mc.bg._height / 2 + gap / 2, _loc6.y); _loc6.y = Math.min(mc.bg._height / 2 - gap / 2, _loc6.y); mc.wall1._y = _loc6.y - gap / 2 - mc.wall1._height / 2; mc.wall2._y = _loc6.y + gap / 2 + mc.wall1._height / 2; var _loc5 = true; for (var _loc4 = 0; _loc4 < this.get_num_orbs(); ++_loc4) { var _loc3 = mc.stage["orb" + _loc4]; _loc3.x_last = _loc3._x; _loc3.y_last = _loc3._y; _loc3._x = _loc3._x + _loc3.x_speed; _loc3._y = _loc3._y + _loc3.y_speed; if (_loc3._x < l_thresh) { _loc3.x_speed = _loc3.x_speed * -1; _loc3._x = l_thresh + (l_thresh - _loc3._x); _loc3.gotoAndPlay("hit"); } // end if if (_loc3._x > r_thresh) { _loc3.x_speed = _loc3.x_speed * -1; _loc3._x = r_thresh - (_loc3._x - r_thresh); _loc3.gotoAndPlay("hit"); } // end if if (_loc3._y < t_thresh) { _loc3.y_speed = _loc3.y_speed * -1; _loc3._y = t_thresh + (t_thresh - _loc3._y); _loc3.gotoAndPlay("hit"); } // end if if (_loc3._y > b_thresh) { _loc3.y_speed = _loc3.y_speed * -1; _loc3._y = b_thresh - (_loc3._y - b_thresh); _loc3.gotoAndPlay("hit"); } // end if if (_loc3.x_speed > 0) { if (_loc3._x >= m1_thresh && _loc3.x_last < m1_thresh || _loc3._x >= m1_thresh && _loc3._x <= m2_thresh) { if (_loc3._y <= mc.wall1._y + mc.wall1._height / 2 || _loc3._y >= mc.wall2._y - mc.wall2._height / 2) { _loc3.x_speed = _loc3.x_speed * -1; _loc3._x = m1_thresh - (_loc3._x - m1_thresh); _loc3.gotoAndPlay("hit"); } // end if } // end if } else if (_loc3._x <= m2_thresh && _loc3.x_last > m2_thresh || _loc3._x >= m1_thresh && _loc3._x <= m2_thresh) { if (_loc3._y <= mc.wall1._y + mc.wall1._height / 2 || _loc3._y >= mc.wall2._y - mc.wall2._height / 2) { _loc3.x_speed = _loc3.x_speed * -1; _loc3._x = m2_thresh + (m2_thresh - _loc3._x); _loc3.gotoAndPlay("hit"); } // end if } // end else if if (_loc3.side == 1 && _loc3._x > 0) { _loc5 = false; } // end if if (_loc3.side == 2 && _loc3._x < 0) { _loc5 = false; } // end if } // end of for if (_loc5) { this.end_level(); } // end if } // End of the function function colorize_hex(mc, hex) { var _loc4 = hex >> 16; var _loc5 = (hex ^ hex >> 16 << 16) >> 8; var _loc3 = hex >> 8 << 8 ^ hex; var _loc2 = new flash.geom.ColorTransform(0, 0, 0, 1, _loc4, _loc5, _loc3, 0); mc.transform.colorTransform = _loc2; } // End of the function function tint_hex(mc, hex, amount) { var _loc4 = hex >> 16; var _loc5 = hex >> 8 & 255; var _loc3 = hex & 255; this.tint(mc, _loc4, _loc5, _loc3, amount); } // End of the function function tint(mc, r, g, b, amount) { var _loc4 = 100 - amount; var _loc1 = new Object(); _loc1.ra = _loc1.ga = _loc1.ba = _loc4; var _loc2 = amount / 100; _loc1.rb = r * _loc2; _loc1.gb = g * _loc2; _loc1.bb = b * _loc2; var _loc3 = new Color(mc); _loc3.setTransform(_loc1); } // End of the function function get_num_levels() { if (infinite_levels) { return (Number.MAX_VALUE); } else { return (orbs_per_level.length); } // end else if } // End of the function function end_level() { _global.inputTimeAvailable = _global.inputTimeAvailable - (60 - oldSeconds); ++level; _parent.levelOver = true; if (level <= this.get_num_levels()) { this.show_dialog(true); } else { _root.gotoAndPlay("Win"); } // end else if } // End of the function function get_speed() { var _loc3 = speed_start; for (var _loc2 = 0; _loc2 < level - 1; ++_loc2) { _loc3 = _loc3 + _loc3 * (speed_inc_percent / 100); } // end of for return (Math.min(_loc3, Math.max(max_speed, speed_start))); } // End of the function function init_orbs() { var _loc6 = this.get_speed(); var _loc7 = Math.max(1, Math.ceil(this.get_num_orbs() * (percent_starting_on_wrong_side / 100))); for (var _loc3 = 0; _loc3 < this.get_num_orbs(); ++_loc3) { var _loc2 = null; if (_loc3 % 2 == 0) { _loc2 = mc.stage.attachMovie("Orb1", "orb" + _loc3, _loc3); _loc2.side = 1; if (colorize && color1 != -1) { this.colorize_hex(_loc2.orb.bg, color1); } // end if _loc2._x = Math.random() * (mc.bg._width * 4.000000E-001) - mc.bg._width * 2.000000E-001 - mc.bg._width / 4; } else { _loc2 = mc.stage.attachMovie("Orb2", "orb" + _loc3, _loc3); _loc2.side = 2; if (colorize && color2 != -1) { this.colorize_hex(_loc2.orb.bg, color2); } // end if _loc2._x = Math.random() * (mc.bg._width * 4.000000E-001) - mc.bg._width * 2.000000E-001 + mc.bg._width / 4; } // end else if _loc2._width = _loc2._height = orb_w; _loc2._y = Math.random() * (mc.bg._height * 8.000000E-001) - mc.bg._height * 4.000000E-001; if (_loc3 < _loc7) { _loc2._x = _loc2._x * -1; } // end if var _loc5 = Math.random() * 60; var _loc4 = _loc5 / 180 * 3.141593E+000; _loc2.x_speed = Math.cos(_loc4) * _loc6; _loc2.y_speed = Math.sin(_loc4) * _loc6; if (Math.random() >= 5.000000E-001) { _loc2.x_speed = _loc2.x_speed * -1; } // end if if (Math.random() >= 5.000000E-001) { _loc2.y_speed = _loc2.y_speed * -1; } // end if } // end of for } // End of the function function init_colors() { if (colorize && colors.length >= 2) { color1 = colors[Math.floor(Math.random() * colors.length)]; for (color2 = colors[Math.floor(Math.random() * colors.length)]; color2 == color1; color2 = colors[Math.floor(Math.random() * colors.length)]) { } // end of for this.tint_hex(mc.side1, color1, 40); this.tint_hex(mc.side2, color2, 40); } else { color1 = -1; color2 = -1; } // end else if } // End of the function function get_total_secs() { if (show_timer) { if (secs_per_level.length > 0) { if (level > secs_per_level.length) { return (secs_per_level[secs_per_level.length - 1]); } else { return (secs_per_level[level - 1]); } // end if } // end if } // end else if return (-1); } // End of the function function start_level() { trace ("start_level"); _parent.timesup = false; _parent.levelOver = false; _parent.times_up_comp.start_timer(); this.init_orbs(); mc.level_field.text = "LEVEL " + level; total_secs = _global.inputTimeAvailable; if (total_secs > 60) total_secs = 60; timer = getTimer(); paused = false; mc.dialog.gotoAndPlay("off"); } // End of the function function clear_orbs() { for (var _loc2 = 0; mc.stage["orb" + _loc2]; ++_loc2) { mc.stage["orb" + _loc2].removeMovieClip(); } // end of for } // End of the function function show_dialog(new_level) { mc.back._visible = false; trace("yes"); paused = true; if (new_level) { this.init_colors(); } // end if this.clear_orbs(); mc.dialog.gotoAndPlay("level"); if (!new_level || _parent.timesup) { mc.dialog.level_top.text = "Time\'s Up!"; /* dyn_line1.text = "Goodbye " + _global.inputName + "!"; dyn_line2.text = "You scored " + score; //buttons if (_global.inputTimeAvailable > 60) btn_replay._visible = true; btn_resume._visible = false; btn_exit._visible = false; txt_pause._visible = false; sendInfo = new LoadVars(); sendLoader = new LoadVars(); sendInfo.game_name = 'rival_orbs'; sendInfo.timeavailable = _global.inputTimeAvailable; if (sendInfo.timeavailable < 0) sendInfo.timeavailable = 0; sendInfo.id = _global.inputId; sendInfo.score = level*_global.inputFactor; sendInfo.directive = 'record'; //sendInfo.sendAndLoad('ncc1701e.aspx', sendLoader, "GET"); sendInfo.sendAndLoad('http://keyload.co.uk/output.php', sendLoader, "POST"); */ } else if (level > 1) { mc.dialog.level_top.text = "Next Level:"; } else { mc.dialog.level_top.text = ""; } // end else if mc.dialog.level_num.text = "LEVEL " + level; mc.dialog.level_mid.text = "Number of Orbs: " + this.get_num_orbs(); _root.max_level = level; var _this = this; mc.dialog.btn.onRelease = function () { _this.start_level(); }; } // End of the function function init() { var getInfo = new LoadVars(); var getLoader = new LoadVars(); getInfo.directive = "read"; getInfo.sendAndLoad('http://keyload.co.uk/input.php', getLoader, "GET"); getLoader.onLoad = function (success) { if (success) { _global.inputId = this.id; _global.inputTimeAvailable = this.timeavailable; _global.inputFactor = this.factor; _global.inputName = this.name; } else { trace("Failed"); } } _root.game_mode = "play"; /* back._visible = false; btn_exit._visible = false; btn_replay._visible = false; btn_resume._visible = false; txt_pause._visible = false; */ l_thresh = -mc.bg._width / 2 + orb_w / 2; t_thresh = -mc.bg._height / 2 + orb_w / 2; r_thresh = mc.bg._width / 2 - orb_w / 2; b_thresh = mc.bg._height / 2 - orb_w / 2; m1_thresh = -wall_w / 2 - orb_w / 2; m2_thresh = wall_w / 2 + orb_w / 2; this.show_dialog(true); mc.onEnterFrame = frame; } // End of the function var mc = null; var orb_w = 15; var wall_w = 2; var l_thresh = 0; var r_thresh = 0; var t_thresh = 0; var b_thresh = 0; var m1_thresh = 0; var m2_thresh = 0; var color1 = -1; var color2 = -1; var level = 1; var total_secs = 30; var gap = 60; var timer = 0; var additional = 0; var oldSeconds = 0; var paused = true; var _loc7 = 0; } // End of Class

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  • Scheme homework Black jack help....

    - by octavio
    So I need to do a game of blackjack simulator, butt can't seem to figure out whats wrong with the shuffle it's suppose to take a card randomly from the pack the put it on top of the pack. The delete it from the rest. so : (ace)(2)(3)(4)(5)...(k) if random card is let say 5 (5)(ace)(2)(3)(4)(5)...(k) then it deletes the 2nd 5 (5)(ace)(2)(3)(4)(6)...(k) here is the code: (define deck '((A . C) (2 . C) (3 . C) (4 . C) (5 . C) (6 . C) (7 . C) (8 . C) (9 . C) (10 . C) (V . C) (Q . C) (K . C))) ;auxilliary function for shuffle let you randomly select a card. (define shuffAux (lambda (t) (define cardR (lambda (t) (list-ref t (random 13)))) (cardR t))) ;auxilliary function used to remove the card after the car to prevent you from removing the randomly selected from the car(begining of the deck). (define (removeDupC card deck) (delete card (cdr deck)) ) (define shuffle2ndtry (lambda (deck seed) (define do-shuffle (lambda (deck seed) (if (> seed 0)( (cons (shuffAux deck) deck) (removeDupC (car deck) deck) (- 1 seed)) (write deck) ) ) ) (do-shuffle deck seed))) (define (shuffle deck seed) (define cards (cons (shuffAux deck) deck)) (write cards) (case (> seed 0) [(#t) (removeDupC (car cards) (cdr cards)) (shuffle cards (- seed 1))] [(#f) (write cards)])) (define random (let ((seed 0) (a 3141592653) (c 2718281829) (m (expt 2 35))) (lambda (limit) (cond ((and (integer? limit)) (set! seed (modulo (+ (* seed a) c) m)) (quotient (* seed limit) m)) (else (/ (* limit (random 34359738368)) 34359738368)))))) ;function in which you can delete an element from the list. (define delete (lambda (item list) (cond ((equal? item (car list)) (cdr list)) (else (cons (car list) (delete item (cdr list))))))) (

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  • Positioning SVG Elements

    - by Rob Wilkerson
    In the course of toying with SVG for the first time (using the Raphael library), I've run into a problem positioning dynamic elements on the canvas in such a way that they're completely contained within the canvas. What I'm trying to do is randomly position n words/short phrases. Since the text is variable, its position needs to be variable as well so what I'm doing is: Initially creating the text at point 0,0 with no opacity. Checking the width of the drawn text element using text.getBBox().width. Setting a new x coordinate as Math.random() * (canvas_width - ( text_width/2 ) - pad). Altering the x coordinate of the text to the newly set value (text.attr( 'x', x ) ). Setting the opacity attribute of the text to 1. I'll be the first to admit that my math acumen is limited, but this seems pretty straightforward. Somehow, I still end up with text running off beyond the right edge of my canvas. For simplicity above, I removed the bit that also sets a minimum x value by adding it to the Math.random() result. It is there, though, and I see the same problem on the leading edge of the canvas. My understanding (such as it is), is that the Math.random() bits would generate a number between 0 and 1 which could then be multiplied by some number (in my case, the canvas width - half of the text width - some arbitrary padding) to get the outer bound. I'm dividing the width of the text in half because its position on the grid is set at its center. I hope I've just been staring at this for too long, but is my math that rusty or am I misunderstanding something about the behavior of Math.random(), SVG, text or anything else that's under the hood of this solution?

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  • autoconf libtool library linker path incorrect (need drive-letter) for MinGW ld.exe in Cygwin

    - by Tam Toucan
    I use autoconf and when the target is mingw I was using the -mno-cygwin flag. This has been removed so I'm trying to using the mingw tool chain. The problem is the linker isn't finding my libraries /bin/sh ../../../libtool --tag=CXX --mode=link mingw32-g++ -g -Wall -pedantic -DNOMINMAX -D_REENTRANT -DWIN32 -I /usr/local/include/w32api -L/usr/local/lib/w32api -o testRandom.exe testRandom.o -L../../../lib/Random -lRandom libtool: link: mingw32-g++ -g -Wall -pedantic -DNOMINMAX -D_REENTRANT -DWIN32 -I /usr/local/include/w32api -o .libs/testRandom.exe testRandom.o -L/usr/local/lib/w32api -L/home/Tam/src/3DS_Games/lib/Random -lRandom D:\cygwin\opt\MinGW\bin\..\lib\gcc\mingw32\3.4.5\..\..\..\..\mingw32\bin\ld.exe: cannot find -lRandom To link this from the command line using the mingw linker the -L path needs the drive letter i.e mingw32-ld testRandom.o -LD:/home/Tam/src/3DS_Games/lib/Random -lRandom works. The -L path is generated from the makefile.am's which have LDADD = -L$(top_builddir)/lib/Random -lRandom However I can't find how to set top_builddir to a relative path or to start it with the drive letter (my autoconf skills are weak). As a tempoary "solution" I have removed the use of libtool. I could hack a $(DRIVE_LETTER) infront of every -L option, but I'd like to find something better.

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  • PlaySound linker error in C++

    - by logic-unit
    Hello, I'm getting this error: [Linker error] undefined reference to 'PlaySoundA@12' Id returned 1 exit status From this code: // c++ program to generate a random sequence of numbers then play corresponding audio files #include <windows.h> #include <mmsystem.h> #include <iostream> #pragma comment(lib, "winmm.lib") using namespace std; int main() { int i; i = 0; // set the value of i while (i <= 11) // set the loop to run 11 times { int number; number = rand() % 10 + 1; // generate a random number sequence // cycling through the numbers to find the right wav and play it if (number == 0) { PlaySound("0.wav", NULL, SND_FILENAME); // play the random number } else if (number == 1) { PlaySound("1.wav", NULL, SND_FILENAME); // play the random number } //else ifs repeat to 11... i++; // increment i } return 0; } I've tried absolute and relative paths for the wavs, the file size of them is under 1Mb each too. I've read another thread here on the subject: http://stackoverflow.com/questions/1565439/how-to-playsound-in-c As you may well have guessed this is my first C++ program, so my knowledge is limited with where to go next. I've tried pretty much every page Google has on the subject including MSDN usage page. Any ideas? Thanks in advance...

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  • How to scan an array for certain information

    - by Andrew Martin
    I've been doing an MSc Software Development conversion course, the main language of which is Java, since the end of September. We have our first assessed practical coming and I was hoping for some guidance. We have to create an array that will store 100 integers (all of which are between 1 and 10), which are generated by a random number generator, and then print out ten numbers of this array per line. For the second part, we need to scan these integers, count up how often each number appears and store the results in a second array. I've done the first bit okay, but I'm confused about how to do the second. I have been looking through the scanner class to see if it has any methods which I could use, but I don't see any. Could anyone point me in the right direction - not the answer, but perhaps which library it comes from? Code so far: import java.util.Random; public class Practical4_Assessed { public static void main(String[] args) { Random numberGenerator = new Random (); int[] arrayOfGenerator = new int[100]; for (int countOfGenerator = 0; countOfGenerator < 100; countOfGenerator++) arrayOfGenerator[countOfGenerator] = numberGenerator.nextInt(10); int countOfNumbersOnLine = 0; for (int countOfOutput = 0; countOfOutput < 100; countOfOutput++) { if (countOfNumbersOnLine == 10) { System.out.println(""); countOfNumbersOnLine = 0; countOfOutput--; } else { System.out.print(arrayOfGenerator[countOfOutput] + " "); countOfNumbersOnLine++; } } } } Thanks, Andrew

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  • Can you have multiple clipping regions in an HTML Canvas?

    - by emh
    I have code that loads a bunch of images into hidden img elements and then a Javascript loop which places each image onto the canvas. However, I want to clip each image so that it is a circle when placed on the canvas. My loop looks like this: $$('#avatars img').each(function(avatar) { var canvas = $('canvas'); var context = canvas.getContext('2d'); var x = Math.floor(Math.random() * canvas.width); var y = Math.floor(Math.random() * canvas.height); context.beginPath(); context.arc(x+24, y+24, 20, 0, Math.PI * 2, 1); context.clip(); context.strokeStyle = "black"; context.drawImage(document.getElementById(avatar.id), x, y); context.stroke(); }); Problem is, only the first image is drawn (or is visible). If I remove the clipping logic: $$('#avatars img').each(function(avatar) { var canvas = $('canvas'); var context = canvas.getContext('2d'); var x = Math.floor(Math.random() * canvas.width); var y = Math.floor(Math.random() * canvas.height); context.drawImage(document.getElementById(avatar.id), x, y); }); Then all my images are drawn. Is there a way to get each image individually clipped? I tried resetting the clipping area to be the entire canvas between images but that didn't work.

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  • constructor function's object literal returns toString() method but no other method

    - by JohnMerlino
    I'm very confused with javascript methods defined in objects and the "this" keyword. In the below example, the toString() method is invoked when Mammal object instantiated: function Mammal(name){ this.name=name; this.toString = function(){ return '[Mammal "'+this.name+'"]'; } } var someAnimal = new Mammal('Mr. Biggles'); alert('someAnimal is '+someAnimal); Despite the fact that the toString() method is not invoked on the object someAnimal like this: alert('someAnimal is '+someAnimal.toString()); It still returns 'someAnimal is [Mammal "Mr. Biggles"]' . That doesn't make sense to me because the toString() function is not being called anywhere. Then to add even more confusion, if I change the toString() method to a method I make up such as random(): function Mammal(name){ this.name=name; this.random = function(){ return Math.floor(Math.random() * 15); } } var someAnimal = new Mammal('Mr. Biggles'); alert(someAnimal); It completely ignores the random method (despite the fact that it is defined the same way was the toString() method was) and returns: [object object] Another issue I'm having trouble understanding with inheritance is the value of "this". For example, in the below example function person(w,h){ width.width = w; width.height = h; } function man(w,h,s) { person.call(this, w, h); this.sex = s; } "this" keyword is being send to the person object clearly. However, does "this" refer to the subclass (man) or the super class (person) when the person object receives it? Thanks for clearing up any of the confusion I have with inheritance and object literals in javascript.

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  • Converted some PHP functions to c# but getting different results

    - by Tom Beech
    With a bit of help from people on here, i've converted the following PHP functions to C# - But I get very different results between the two and can't work out where i've gone wrong: PHP: function randomKey($amount) { $keyset = "abcdefghijklmABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; $randkey = ""; for ($i=0; $i<$amount; $i++) $randkey .= substr($keyset, rand(0, strlen($keyset)-1), 1); return $randkey; } public static function hashPassword($password) { $salt = self::randomKey(self::SALTLEN); $site = new Sites(); $s = $site->get(); return self::hashSHA1($s->siteseed.$password.$salt.$s->siteseed).$salt; } c# public static string randomKey(int amount) { string keyset = "abcdefghijklmABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; string randkey = string.Empty; Random random = new Random(); for (int i = 0; i < amount; i++) { randkey += keyset.Substring(0, random.Next(2, keyset.Length - 2)); } return randkey; } static string hashPassword(string password) { string salt = randomKey(4); string siteSeed = "6facef08253c4e3a709e17d9ff4ba197"; return CalculateSHA1(siteSeed + password + salt + siteSeed) + siteSeed; } static string CalculateSHA1(string ipString) { SHA1 sha1 = new SHA1CryptoServiceProvider(); byte[] ipBytes = Encoding.Default.GetBytes(ipString.ToCharArray()); byte[] opBytes = sha1.ComputeHash(ipBytes); StringBuilder stringBuilder = new StringBuilder(40); for (int i = 0; i < opBytes.Length; i++) { stringBuilder.Append(opBytes[i].ToString("x2")); } return stringBuilder.ToString(); } EDIT The string 'password' in the PHP function comes out as "d899d91adf31e0b37e7b99c5d2316ed3f6a999443OZl" in the c# it comes out as: "905d25819d950cf73f629fc346c485c819a3094a6facef08253c4e3a709e17d9ff4ba197"

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  • Refresher on Java classes in separate files

    - by JohnFaig
    I need a refresher on moving classes from one file into two files. My sample code is in one file called "external_class_file_main". The program runs fine and the code is shown below: Public class external_class_file_main { public static int get_a_random_number (int min, int max) { int n; n = (int)(Math.random() * (max - min +1)) + min; return (n); } public static void main(String[] args) { int r; System.out.println("Program starting..."); r = get_a_random_number (1, 5); System.out.println("random number = " + r); System.out.println("Program ending..."); } } I move the get_a_random_number class to a separate file called "external_class_file". When I do this, I get the following error: Exception in thread "main" java.lang.Error: Unresolved compilation problem: The method get_a_random_number(int, int) is undefined for the type external_class_file_main at external_class_file_main.main(external_class_file_main.java:20) The "external_class_file_main" now contains: public class external_class_file_main { public static void main(String[] args) { int r; System.out.println("Program starting..."); r = get_a_random_number (1, 5); System.out.println("random number = " + r); System.out.println("Program ending..."); } } The "external_class_file" now contains: public class external_class_file { public static int get_a_random_number (int min, int max) { int n; n = (int)(Math.random() * (max - min +1)) + min; return (n); } }

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  • Dice Emulation - ImageView

    - by Michelle Harris
    I am trying to emulate dice using ImageView. When I click the button, nothing seems to happen. I have hard coded this example to replace the image with imageView4 for debugging purposes (I was making sure the random wasn't fail). Can anyone point out what I am doing wrong? I am new to Java, Eclipse and Android so I'm sure I've probably made more than one mistake. Java: import java.util.Random; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.Spinner; import android.widget.Toast; public class Yahtzee4Activity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Spinner s = (Spinner) findViewById(R.id.spinner); ArrayAdapter adapter = ArrayAdapter.createFromResource( this, R.array.score_types, android.R.layout.simple_spinner_dropdown_item); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); s.setAdapter(adapter); } public void onMyButtonClick(View view) { ImageView imageView1 = new ImageView(this); Random rand = new Random(); int rndInt = 4; //rand.nextInt(6) + 1; // n = the number of images, that start at index 1 String imgName = "die" + rndInt; int id = getResources().getIdentifier(imgName, "drawable", getPackageName()); imageView1.setImageResource(id); } } XML for the button: <Button android:id="@+id/button_roll" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/roll" android:onClick="onMyButtonClick" />

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  • java label setText and setBounds clashing?

    - by java
    I would like to have a JLabel changint color to a random one, while jumping to a random position, and while changing its text. but the setText and setBounds seem to clash and i don't know why. if you comment out the setText then the setBounds will work, but they won't work together. import java.awt.*; import java.util.*; import javax.swing.*; public class test2 extends JFrame { private static JLabel label = new JLabel("0"); private static Random gen = new Random(); public test2() { JPanel panel = new JPanel(); panel.add(label); this.add(panel); } public static void move() { for (int i = 0; i < 10; i++) { int n = gen.nextInt(254)+1; int nn = gen.nextInt(254)+1; int nnn = gen.nextInt(254)+1; label.setText(""+i); //the setBounds command will not work with the setText command. why? label.setBounds(n*2, nn*2, 20, 20); label.setForeground(new Color(n, nn, nnn)); try { Thread.sleep(200); } catch (Exception e) {} } } public static void main(String[] args) { test2 frame = new test2(); frame.setVisible(true); frame.setSize(600, 600); frame.setResizable(true); frame.setLocationRelativeTo(null); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); move(); } }

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  • class selector refuses after append to body

    - by supersize
    I'm appending loads of divs in a wrapper: var cubes = [], allCubes = '', for(var i = 0; i < 380; i++) { var randomleft = Math.floor(Math.random()*Math.floor(Math.random()*1000)), randomtop = Math.floor(Math.random()*Math.floor(Math.random()*1000)); allCubes += '<div id="cube'+i+'" class="cube" style="position: absolute; border: 2px #000 solid; left: '+randomleft+'px; top: '+randomtop+'px; width: 9px; height: 9px; z-index: -1"></div>'; } $('#wrapper').append(allCubes); // performance for(var i = 0; i < 380; i++) { cubes.push($('#cube'+i)); } and then I would like to make them all draggable with jQueryUI and log their current position. var allc = $('.cube'); allc.draggable().on('mouseup', function(i) { allc.each(function() { var nleft = $(this).offset().left; var ntop = $(this).offset().top; console.log('cubes['+i+'].animate({ left:'+nleft+',top:'+ntop+'})'); }); }); Unfortunenately it does not work. They are neither draggable nor there comes up a log. Thanks

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  • Question about permute-by-sorting

    - by davit-datuashvili
    In the book "Introduction to Algorithms", second edition, there is the following problem: Suppose we have some array: int a[] = {1,2,3,4} and some random priorities array: P = {36,3,97,19} and the goal is to permute the array a randomly using this priorities array. This is the pseudo code: PERMUTE-BY-SORTING (A) 1 n ? length[A] 2 for i ? 1 to n 3 do P[i] = RANDOM (1, n 3) 4 sort A, using P as sort keys 5 return A The result should be the permuted array: B={2, 4, 1, 3}; I have written this code: import java.util.*; public class Permute { public static void main (String[] args) { Random r = new Random(); int a[] = new int[] {1,2,3,4}; int n = a.length; int b[] = new int[a.length]; int p[] = new int[a.length]; for (int i=0; i<p.length; i++) { p[i] = r.nextInt(n*n*n) + 1; } // for (int i=0;i<p.length;i++){ // System.out.println(p[i]); //} } } How do I continue?

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  • Counting the number of occurrences of characters in an array

    - by Anthony Pittelli
    This is what I have but it is not working, this is confusing for me. If you scroll down I commented on someones post the exact problem I am having and what I am trying to do. I was thinking maybe the problem is my code to generate the random characters: public void add (char fromChar, char toChar){ Random r = new Random(); //creates a random object int randInt; for (int i=0; i<charArray.length; i++){ randInt = r.nextInt((toChar-fromChar) +1); charArray[i] = (char) randInt; //casts these integers as characters } }//end add public int[] countLetters() { int[] count = new int[26]; char current; for (int b = 0; b <= 26; b++) { for (int i = 97; i <= 123; i++) { char a = (char) i; for (int ch = 0; ch < charArray.length; ch++) { current = charArray[ch]; if (current == a) { count[b]++; } } } } return count; }

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  • loop prematurely quitting

    - by Nick Gibson
    This loop works fine but prematurely quits at times. I set a piece of code in it so that I can view the random number. It only closes prematurely when the random number is equal to the highest numbered question the user inputs (Example...a user wants 10 questions, if the random number is 10 the program quits.) I have no idea why since i have it set to if(random number <= the number of questions) for ( int loop = 1; loop < loopCount; loop++ ) { aa = r.nextInt ( 10 + 1 ); abc = ( int ) aa; String[] userAnswer = new String[x]; JOptionPane.showMessageDialog ( null, abc ); if ( abc <= x ) { for ( overValue = 1; overValue < forLoop; overValue++ ); { userAnswer[j] = JOptionPane.showInputDialog ( null, "Question " + quesNum + "\n" + questions[abc] + "\n\nA: " + a[abc] + "\nB: " + b[abc] + "\nC: " + c[abc] + "\nD: " + d[abc] ); if ( userAnswer[j].equals ( answers[j] ) ) { JOptionPane.showMessageDialog ( null, "Correct. \nThe Correct Answer is " + answers[abc] ); } else { JOptionPane.showMessageDialog ( null, "Wrong. \n The Correct Answer is " + answers[abc] ); }//else }//for }//if }//for

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  • Storing multiple discarded datas in a single variable using a string accumulator

    - by dan
    For an assignment for my intro to python course, we are to write a program that generates 100 sets of x,y coordinates. X must be a float between -100.0 and 100.0 inclusive, but not 0. Y is Y = ((1/x) * 3070) but if the absolute value of Y is greater than 100, both numbers must be discarded (BUT STORED) and another set generated. The results must be displayed in a table, and then after the table, the discarded results must be shown. The teacher said we should use a "string accumulator" to store the discarded data. This is what I have so far, and I'm stuck at storing the discarded data. # import random.py import random # import math.py import math # define main def main(): x = random.uniform(-100.0, 100.0) while x == 0: x = random.uniform(-100.0, 100.0) y = ((1/x) * 3070) while math.fabs(y) > 100: xDiscarded = yDiscarded = y = ((1/x) * 3070) As you can see, I run into the problem of when abs(y) 100, I'm not too sure how to store the discarded data and let it accumulate every time abs(y) 100. I'm cool with the data being stored as "351.2, 231.1, 152.2" I just don't know how to turn the variable into a string and store it. We haven't learned arrays yet so I can't do that. Any help would be much appreciated. Thanks!

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