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  • Nearmap architecture

    - by portoalet
    Looking at http://www.nearmap.com/, Just wondering if you can approximate how much storage is needed to store the images? (NearMap’s monthly city PhotoMaps are captured at 3cm, 5cm, 7.5cm, or 10cm resolution) And what kind of systems/architecture is suitable to deliver those data/images? (say you are not Google, and want to implement this from scratch, what would you do? ) ie. would you store the images in Hadoop, and use memcache to deliver etc ?

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  • Javascript debugging: stopping/breaking at every javascript invocation

    - by portoalet
    I am dealing with a complex legacy javascript code base, and it's difficult to figure out where to put breakpoint (I have to find the files, put a breakpoint in firebug etc). Is there a way so that Firebug breaks on the first javascript execution that it encounters every time? In other words, every time I click on something on the page, and if a javascript code is executed, I want Firebug to break on that line? Of course I don't want Firebug to stop when it executes it's internal javascript. Is this possible?

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  • Perl grep function

    - by portoalet
    Hi, How does the following grep function works (what does !/0o1Iil]/ do? ) @chars = grep !/0o1Iil]/, 0..9, "A".."Z", "a".."z"; use Data::Dumper; print Dumper @chars; to produce the following in @chars? $VAR1 = 0; $VAR2 = 1; $VAR3 = 2; $VAR4 = 3; $VAR5 = 4; $VAR6 = 5; $VAR7 = 6; $VAR8 = 7; $VAR9 = 8; $VAR10 = 9; $VAR11 = 'A'; $VAR12 = 'B'; $VAR13 = 'C'; $VAR14 = 'D'; $VAR15 = 'E'; $VAR16 = 'F'; $VAR17 = 'G'; $VAR18 = 'H'; $VAR19 = 'I'; $VAR20 = 'J'; $VAR21 = 'K'; $VAR22 = 'L'; $VAR23 = 'M'; $VAR24 = 'N'; $VAR25 = 'O'; $VAR26 = 'P'; $VAR27 = 'Q'; $VAR28 = 'R'; $VAR29 = 'S'; $VAR30 = 'T'; $VAR31 = 'U'; $VAR32 = 'V'; $VAR33 = 'W'; $VAR34 = 'X'; $VAR35 = 'Y'; $VAR36 = 'Z'; $VAR37 = 'a'; $VAR38 = 'b'; $VAR39 = 'c'; $VAR40 = 'd'; $VAR41 = 'e'; $VAR42 = 'f'; $VAR43 = 'g'; $VAR44 = 'h'; $VAR45 = 'i'; $VAR46 = 'j'; $VAR47 = 'k'; $VAR48 = 'l'; $VAR49 = 'm'; $VAR50 = 'n'; $VAR51 = 'o'; $VAR52 = 'p'; $VAR53 = 'q'; $VAR54 = 'r'; $VAR55 = 's'; $VAR56 = 't'; $VAR57 = 'u'; $VAR58 = 'v'; $VAR59 = 'w'; $VAR60 = 'x'; $VAR61 = 'y'; $VAR62 = 'z';

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  • Creating get/set method dynamically in javascript

    - by portoalet
    I am trying to create a UserDon object, and trying to generate the get and set methods programmatically ( based on Pro Javascript book by John Resig page 37 ), and am testing this on Firefox 3.5 The problem is: in function UserDon, "this" refers to the window object instead of the UserDon object. So after calling var userdon = new UserDon(...) I got setname and getname methods created on the window object (also setage and getage). How can I fix this? function UserDon( properties ) { for( var i in properties ) { (function(){ this[ "get" + i ] = function() { return properties[i]; }; this[ "set" + i ] = function(val) { properties[i] = val; }; })(); } } var userdon = new UserDon( { name: "Bob", age: 44 });

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  • Scala xhtml attribute breaks because of a question mark

    - by portoalet
    I had a problem with <iframe id="iframe1" src='http://stockcharts.com/h-sc/ui?s=MT&p=D&yr=2&mn=0&dy=0&id=p43321191731' width="300px" height="300px"></iframe> in Lift web framework (Scala) version Message: java.util.NoSuchElementException scala.RandomAccessSeq$$anon$13.next(RandomAccessSeq.scala:165) scala.xml.parsing.MarkupParser$class.normalizeAttributeValue(MarkupParser.scala:1191) It turned out the question mark ? in the iframe src attribute caused this. What can I do to fix this quickly?

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  • scala sbt with pk11 or steps

    - by portoalet
    I am quite frustrated with sbt and pk11/steps I am just trying to run "jetty-run", but i got so many dependency errors, it's not fun anymore. I am stuck with unresolved dependencies for sjson 0.3 Does anyone know which mvn repo can I get sjson 0.3 from?

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  • Dojo How to ColorPalette + TooltipDialog + DropDownButton

    - by portoalet
    I am trying to add a ColorPalette into a TooltipDialog, which in turn is contained inside DropDownButton (dojo 1.3.1) Code: var paramsContent = new dijit.layout.ContentPane(); var colorPalette = new dijit.ColorPalette(); var tooltipThematic = new dijit.TooltipDialog({content: paramsContent}); var colorField = new dijit.form.DropDownButton( {label: 'Select Color', dropDown: tooltipThematic } ); How can I add the colorPalette into tooltipThematic? I did var tooltipThematic = new dijit.TooltipDialog(new dijit.ColorPalette()) but then I got this message: Already registered widget (error message on 1.0) http://o.dojotoolkit.org/forum/dijit-dijit-0-9/dijit-support/already-registered-widget-error-message How can I add the ColorPalette into the TooltipDialog?

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  • oauth problem( app engine)

    - by portoalet
    hi i am trying to pull user's documents data from google docs using oauth, but i cannot understand how to do it - what's the purpose of oauth_verifier - how to get the access token secret? - if i try to use DocsService below, then i have a "server error" - is there a clear tutorial for this? i cannot find any atm.. String oauth_verifier = req.getParameter("oauth_verifier"); String oauth_token = req.getParameter("oauth_token"); String oauthtokensecret = req.getParameter("oauth_token_secret"); GoogleOAuthParameters oauthparam = new GoogleOAuthParameters(); oauthparam.setOAuthConsumerKey("consumer key"); oauthparam.setOAuthConsumerSecret("secret"); oauthparam.setOAuthToken(oauth_token); oauthparam.setOAuthTokenSecret(oauthtokensecret); oauthparam.setOAuthVerifier(oauth_verifier); OAuthHmacSha1Signer signer = new OAuthHmacSha1Signer(); GoogleOAuthHelper oauthhelper = new GoogleOAuthHelper(signer); String accesstoken = ""; String accesstokensecret = ""; try { oauthhelper.getUnauthorizedRequestToken(oauthparam); accesstoken = oauthhelper.getAccessToken(oauthparam); accesstokensecret = oauthparam.getOAuthTokenSecret(); // DocsService client = new DocsService("yourCompany-YourAppName-v1"); ...

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  • html select execute javascript onload

    - by portoalet
    I am using HTML select onchange event to fire another javascript function func1. This html select is written into a form element, which are dynamically generated when users click on a button. The problem is how can I fire the javascript func1 when the dynamically generated form is first shown ? I am thinking of something along the line of on_first_show event for form ? Here is the snippet. I couldnt get the alert('don') to work either (the one just after div) var sPopupContents = "<div ><script type='text/javascript'>alert('don');</script> </div>"; // this javascript is not executed ? I cant get the alert. sPopupContents += "<form name='theform' >"; sPopupContents += "<select name='theselect' onchange='alert(2);"; sPopupContents += "func1()>'"; sPopupContents += "<option value='0' selected='selected'>Value1</option><option value='1'>Value2</option><br/>"; sPopupContents += "</form>";

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  • Investment advice data dump analysis

    - by portoalet
    For my year-end pet project, I'd like to analyze investment advices and their correlation to the stock market performance. The problem is, where do I get the dump of investment advice data (free) ? something like stackoverflow.com data dump will be nice. Or maybe it's easier to do distributed crawling and crawl the public finance webpages for investment advices? Investment advice is buy/sell advice for stocks/forex, issued by institution/investment advisor.

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  • Captcha replacement

    - by portoalet
    Hi, I stumbled upon http://www.kettletime.com.au/chance where the user needs to drag and drop a box with a number into another box to prove that he is human. How do you implement this? Any free library to do this? Thanks

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  • jms unresolved message-destination-ref

    - by portoalet
    hi, I am using netbeans 6.8, and glassfish v3, and making a simple jms application to work. I got this: com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Unresolved Message-Destination-Ref jms/[email protected]@null into class enterpriseapplication4.Main Code: public class Main { @Resource(name = "jms/myQueue") private static Topic myQueue; @Resource(name = "jms/myFactory") private static ConnectionFactory myFactory; ... // the rest is just boiler plate created by netbeans } In my Glassfish v3 admin console, I have jms/myFactory as my ConnectionFactory and jms/myQueue as my Destination Resources. What am I missing? Full stack: WARNING: enterprise.deployment.backend.invalidDescriptorMappingFailure com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Unresolved Message-Destination-Ref jms/[email protected]@null into class enterpriseapplication4.Main at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:614) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.inject(InjectionManagerImpl.java:384) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectClass(InjectionManagerImpl.java:210) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectClass(InjectionManagerImpl.java:202) at org.glassfish.appclient.client.acc.AppClientContainer$ClientMainClassSetting.getClientMainClass(AppClientContainer.java:599) at org.glassfish.appclient.client.acc.AppClientContainer.getMainMethod(AppClientContainer.java:498) at org.glassfish.appclient.client.acc.AppClientContainer.completePreparation(AppClientContainer.java:397) at org.glassfish.appclient.client.acc.AppClientContainer.prepare(AppClientContainer.java:311) at org.glassfish.appclient.client.AppClientFacade.prepareACC(AppClientFacade.java:264) at org.glassfish.appclient.client.acc.agent.AppClientContainerAgent.premain(AppClientContainerAgent.java:75) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:323) at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:338) Caused by: javax.naming.NamingException: Lookup failed for 'java:comp/env/jms/myQueue' in SerialContext targetHost=localhost,targetPort=3700 [Root exception is javax.naming.NameNotFoundException: No object bound for java:comp/env/jms/myQueue [Root exception is java.lang.NullPointerException]] at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:442) at javax.naming.InitialContext.lookup(InitialContext.java:392) at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:513) ... 15 more Caused by: javax.naming.NameNotFoundException: No object bound for java:comp/env/jms/myQueue [Root exception is java.lang.NullPointerException] at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:218) at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:428) ... 17 more Caused by: java.lang.NullPointerException at javax.naming.InitialContext.getURLScheme(InitialContext.java:269) at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:318) at javax.naming.InitialContext.lookup(InitialContext.java:392) at com.sun.enterprise.naming.util.JndiNamingObjectFactory.create(JndiNamingObjectFactory.java:75) at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:688) at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:657) at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:148) ... 18 more Regards

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  • Final enum in Thread's run() method

    - by portoalet
    Hi, Why is the Elvis elvis definition has to be final to be used inside the Thread run() method? Elvis elvis = Elvis.INSTANCE; // ----> should be final Elvis elvis = Elvis.INSTANCE elvis.sing(4); Thread t1 = new Thread( new Runnable() { @Override public void run() { elvis.sing(6); // --------> elvis has to be final to compile } } ); public enum Elvis { INSTANCE(2); Elvis() { this.x = new AtomicInteger(0); } Elvis(int x){ this.x = new AtomicInteger(x); } private AtomicInteger x = new AtomicInteger(0); public int getX() { return x.get(); } public void setX(int x) {this.x = new AtomicInteger(x);} public void sing(int x) { this.x = new AtomicInteger(x); System.out.println("Elvis singing.." + x); } }

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  • Measuring the time to create and destroy a simple object

    - by portoalet
    From Effective Java 2nd Edition Item 7: Avoid Finalizers "Oh, and one more thing: there is a severe performance penalty for using finalizers. On my machine, the time to create and destroy a simple object is about 5.6 ns. Adding a finalizer increases the time to 2,400 ns. In other words, it is about 430 times slower to create and destroy objects with finalizers." How can one measure the time to create and destroy an object? Do you just do: long start = System.nanoTime(); SimpleObject simpleObj = new SimpleObject(); simpleObj.finalize(); long end = System.nanoTime(); long time = end - start;

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  • How to add a new page in Lift framework

    - by portoalet
    How can I add a new page in the webapp directory in lift that can be accessed by users? Currently only the index.html can be accessed through http://localhost:8080/ or http://localhost:8080/index.html Say I add a static file newpage.html into webapp dir, then what can I do so users can access it through http://localhost:8080/newpage.html ?

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  • Scala and Java Real-Time System

    - by portoalet
    Just wondering if anybody has run Scala app or web-app on Java Real-Time system? I assume because scala is bytecode compatible with regular JVM, then it should not take much effort to run it on a Real Time JVM such as Sun Java Real-Time System ?

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  • Scala create xhtml elements dynamically

    - by portoalet
    Given a String array val www = List("http://bloomberg.com", "http://marketwatch.com"); I want to dynamically generate <span id="span1">http://bloomberg.com</span> <span id="span2">http://marketwatch.com</span> def genSpan(web: String) = <span id="span1"> + web + </span>; www.map(genSpan); // How can I pass the loop index? How can I use scala map function to generate the ids (span1, span2), as 1 and 2 are the loop indexes ? Or is the only way is to use for comprehension?

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  • Scala Unit type

    - by portoalet
    I use opencsv to parse csv files, and my code is while( (line = reader.readNext()) != null ) { .... } I got a compiler warning saying: comparing values of types Unit and Null using `!=' will always yield true [warn] while( (aLine = reader.readNext()) != null ) { How should I do the while loop?

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