Grandes Números

A medida que la civilizacion avanza se usa numeros mayores, por diferentes motivos.
Uno de ellos es lamentablemente la inflación de ciertos paises por

Un caso historico es Alemania justo antes de la Segunda Guerra Mundial y hoy en dia es Zimbawe:

https://en.wikipedia.org/wiki/File:Zimbabwe_Hyperinflation_2008_notes.jpg

http://gamasutra.com/view/feature/183525/the_burning_of_star_wars_the_old_.php

Oracle VirtualBox stuck installation

When re-installing Virtualbox, it hangs and nothing happens.

Googling I found the solution:
http://www.tomshardware.com/forum/38226-63-problems-oracle-virtualbox

Pasting the answers here:

VirtualBox doesn't install startup items or services on Windows host, rather it installs several device drivers which may be the ones giving you problems. Depending on your settings during the installation, these drivers should be in your system:  

VBoxDrv VirtualBox Support Driver Oracle Corporation c:\windows\system32\drivers\vboxdrv.sys  

VBoxNetAdp VirtualBox Host-Only Network Adapter Driver Oracle Corporation 

c:\windows\system32\drivers\vboxnetadp.sys VBoxNetFlt VirtualBox 

Bridged Networking Driver Oracle Corporation 

c:\windows\system32\drivers\vboxnetflt.sys  

VBoxUSBMon VirtualBox USB Monitor Driver Oracle Corporation c:\windows\system32\drivers\vboxusbmon.sys 

TAP-Win32 Adapter V9 - VirtualBox Bridged Networking Driver Miniport  

Try using a program like Autoruns to disable those drivers and check the Device Manager for any VirtualBox related entries that may be marked as a problem. If the failed installation still shows on in your Programs and Features, try using CCleaner to remove that entry from the list. Before trying to reinstall again, download the latest release of VirtualBox and make sure the installer's checksum is correct. 
Post a reply if this helps you or not. 

--------

Thanks for those pointers - I think I have now solved the problem!  

Starting with a system that has VirtualBox installed and was thus hanging on reboot I did several 'shutdown->restart's to prove the frequency. I got 4 hangs out of 8 reboots.  

Then I looked for the drivers. I could only find 3 - VboxNetAdp, VboxUsbMon and VboxDrv. (The last 2 are 'hidden - non PnP drivers' you have to enable hidded drivers to see them. I disabled all three and repeated the restart tests: 8/8 success!  

Now I changed the status of VboxDrv and VboxUsbMon from 'system' to 'demand'. That failed first time so I tried 'automatic'. Then I did the restart tests again: 8/8 success. Re enable the VboxNetAdp as well... again success!  

Now I had re-enabled all the drivers so I tried running Virtualbox again with complete success. So far I have had no hangs on restart with those two non PnP drivers set to automatic. (See here for an explanation of driver startup types http://technet.microsoft.com/en-us [...] 25630.aspx )  

BTW the checksum on the package is wrong! Oracle have released a new version of the VirtualBox without updating the MD5 page. You can see the release number of the installer is different from that quoted on the checksum page!  

Thanks again - problem solved!

RegExp Q*Bert

I was reading the famous Coding Horror and his comparison between RegExp and Q*Bert languages is very funny and "accurate".

This remains me the post of the new book of RegExp cookbook 2nd ed :

(?:429496729[0-5]|42949672[0-8][0-9]|4294967[01][0-9]{2}|429496[0-6]?[0-9]{3}|42949[0-5][0-9]{4}|4294[0-8][0-9]{5}|429[0-3][0-9]{6}|42[0-8]?[0-9]{7}|4[01][0-9]{8}|3[0-9]{9}|2[2-9][0-9]{8}|21[5-9][0-9]{7}|214[89]?[0-9]{6}|2147[5-9][0-9]{5}|214749[0-9]{4}|214748[4-9][0-9]{3}|2147483?[7-9][0-9]{2}|21474836[5-9][0-9]|214748364[89])

Still I think there must be a better solution for it. Anyone ?

Bobby Fishcer jugando tenis de mesa

Estas fotos de Bobby Fishcer jugando ping-pong son de culto:

Imagenes del documental de HBO: Bobby Fischer Against the World (2011):

Documental de uno de los mas grandes jugadores de ajedrez del mundo, Bobby Fischer. Muestra de forma agil y entretenida la vida inicial de este genio que de forma autodidactitca aprendio y supero las tecnicas de la epoca ajedrecistica.

Entrevistas a los principales actores del gran bullado campeonato del mundo de 1972 contra Spassky. Filmaciones de la epoca y como algo tan lento pudo tomar tanta atencion, que claro que por el tema de la guerra fria, hizo un impacto global.

Despues de llegar a una cuspide insuperable se ve la caid libre de este gran jugador que años despues pudimos ver por enfermedades mentales no tratadas cayo en un decadencia sin retorno. Entrega una triste y real vision de lo que sucedio con él y quizas deja un espacio al libre albedrio para imaginar si hubiese jugado contra Karpov y seguido una vida mas racional.
Curioso detalles es la locura de varios grandes jugadores mencionados en el filme... será un patrón o mera coincidencia ?

Para cuaquier persona que haya jugado a algun nivel o respete este deporte-ciencia, es una manera fresca y dinamica de ver esta biografia del mas grande los los jugadores norteamericanos.

NPE: Node Manager

Working with WLS 10.3.5 and trying to start Node Manager (NM) using a script startNodeManager.cmd (yes, windows).

The following error was thrown:

Node manager v10.3





Configuration settings:



NodeManagerHome=C:\oracle\wls1035\WLSERV~1.3\common\NODEMA~1

ListenAddress=

ListenPort=5546

ListenBacklog=50

SecureListener=true

AuthenticationEnabled=true

NativeVersionEnabled=true

CrashRecoveryEnabled=false

JavaHome=C:\oracle\wls1035\JDK160~1\jre

StartScriptEnabled=false

StopScriptEnabled=false

StartScriptName=startWebLogic.cmd

StopScriptName=

LogFile=C:\oracle\wls1035\WLSERV~1.3\common\NODEMA~1\nodemanager.log

LogLevel=INFO

LogLimit=0

LogCount=1

LogAppend=true

LogToStderr=true

LogFormatter=weblogic.nodemanager.server.LogFormatter

DomainsFile=C:\oracle\wls1035\WLSERV~1.3\common\NODEMA~1\nodemanager.domains

DomainsFileEnabled=true

StateCheckInterval=500

  java.lang.NullPointerException
        at java.util.Hashtable.containsKey(Hashtable.java:314)
        at weblogic.nodemanager.server.NMServerConfig.initNetworkInfoList(NMServerConfig.java:491)
        at weblogic.nodemanager.server.NMServerConfig.getNetworkInfoList(NMServerConfig.java:481)
        at weblogic.nodemanager.server.NMServerConfig.print(NMServerConfig.java:599)
        at weblogic.nodemanager.server.NMServerConfig.print(NMServerConfig.java:561)
        at weblogic.nodemanager.server.NMServer.(NMServer.java:166)
        at weblogic.nodemanager.server.NMServer.main(NMServer.java:375)
        at weblogic.NodeManager.main(NodeManager.java:31)Sep 25, 2012 12:13:20 PM weblogic.nodemanager.server.NMServer mainSEVERE: Fatal error in node manager serverjava.lang.NullPointerException
        at java.util.Hashtable.containsKey(Hashtable.java:314)
        at weblogic.nodemanager.server.NMServerConfig.initNetworkInfoList(NMServerConfig.java:491)
        at weblogic.nodemanager.server.NMServerConfig.getNetworkInfoList(NMServerConfig.java:481)
        at weblogic.nodemanager.server.NMServerConfig.print(NMServerConfig.java:599)
        at weblogic.nodemanager.server.NMServerConfig.print(NMServerConfig.java:561)
        at weblogic.nodemanager.server.NMServer.(NMServer.java:166)
        at weblogic.nodemanager.server.NMServer.main(NMServer.java:375)
        at weblogic.NodeManager.main(NodeManager.java:31)



goto finish

ENDLOCAL

This can be fixed by applying patch 12564602

Paradoja de Guarismos

La mitad de tres es ocho.

3 : 8

Número Mágico

16126

Oreilly Second Edition of Regular Expressions Cookbook

I was reading the free sampler of this new edition and paid my attention the reference to Recipe 6.7:

So I tested it, but it doesn't work as expected:

String regexp = "(?:429496729[0-5]|42949672[0-8][0-9]|4294967[01][0-9]{2}|429496[0-6]?[0-9]{3}|42949[0-5][0-9]{4}|4294[0-8][0-9]{5}|429[0-3][0-9]{6}|42[0-8]?[0-9]{7}|4[01][0-9]{8}|3[0-9]{9}|2[2-9][0-9]{8}|21[5-9][0-9]{7}|214[89]?[0-9]{6}|2147[5-9][0-9]{5}|214749[0-9]{4}|214748[4-9][0-9]{3}|2147483?[7-9][0-9]{2}|21474836[5-9][0-9]|214748364[89])"; 

String text = "214748364 8 2147483648 2147483650 4294967295";

I get the following results:

214748364
214748364
214748365
4294967295

is this a typo in the book or maybe RegexMagic is wrong.

http://www.regexguru.com/

Regards,

German

How to retrieve XML sent into SOAP Payload

Using WebLogic Server 10.3.5 , we need a way to retrieve XML payload that is not sent between CDATA:

<foo>
<bar>
foobar
</bar>
</foo>

To implement the solution, please use the following snippet code to achieve the requirement:

To achieve this, we use JAX-RPC and following webservice endpoint:
in the method nodeToString() we are getting the XML as String:

@WebMethod()

public String sayHello(javax.xml.soap.SOAPElement message) {

System.out.println("**************************ENDPOINT**************************************************");

System.out.println("sayHello:" + message.toString());

System.out.println("sayHello:" + message.getClass());



printNodeToConsole(message);

String xml_str = nodeToString(message);



System.out.println("****************************XML**********************");

System.out.println(xml_str);

System.out.println("****************************XML**********************");



return "Here is the message: '" + message + "'";

}





private String nodeToString(Node node) {

StringWriter sw = new StringWriter();

try {

System.out.println("Start string conversion...");

Transformer t = TransformerFactory.newInstance().newTransformer();

t.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");

t.transform(new DOMSource(node), new StreamResult(sw));

} catch (TransformerException te) {

System.out.println("nodeToString Transformer Exception");

}

System.out.println("end string conversion...");

return sw.toString();

}

There is a workaround escaping the XML with CDATA or XML entities < >
but the solution would be to use javax.xml.soap.SOAPElement as parameter of the webservice endpoint

Numbers with Thousand Separators

My solution for Numbers with Thousand Separators regexp:

^\-?[0-9]{1,3}(\,[0-9]{3})*(\.[0-9]+)?$|^[0-9]+(\.[0-9]+)?$