Roger Yates

Hi Eric,

The description of the book talks of various techniques and concepts but, for me, leaves one question unanswered:
As a Java developer of many years, will I be able to use Java to use Quantum Processors (QPUs)?
Having seen your answer in thread https://coderanch.com/t/708288/quantum/engineering/quantum-computing-kicks-happen-Java then the answer seems to be ‘yes’ with the appropriate native libraries (and of course when running on the appropriate hardware or simulator).

So my question becomes more: ‘what language is/can be used to develop these native libraries for QPUs? Is this more assembly-like or are there already compilers for higher level abstractions?’

Thanks!

Hi Josh,

I’m a great fan of your 2nd edition book. What would you say are the compelling differences from 2nd to 3rd editions?

Thanks Ilja.

So, as a summary for anyone else interested in copying/moving whole lines:

Ctrl+Alt+down: copies current line or selected lines to below

Ctrl+Alt+up: copies current line or selected lines to above

Alt+up: moves current line or selected lines to above

Alt+down: moves current line or selected lines to below

Ctrl+Shift+L: brings up a List of shortcut keys & pressing twice gets...

Window/Preferences - General/Keys: allows you to modify the lot

As an example, to copy a whole line somewhere else:
1. Press Ctrl+Alt+up (or down)
2. Press Alt+up (or down) as many times until you reach desired location.

... and for a shortcut to editing the shortcuts...

When you've pressed Ctrl+Shift+L for the list of shortcuts, you can then press Ctrl+Shift+L again to get taken straight to the 'General/Keys' section of Windows/Preferences.

i.e. Press Ctrl+Shift+L twice and you're there!

I like Eclipse more and more.

Now to find a shortcut to cut a whole line ready to be dropped somewhere else of my choosing...

Tim,

Thanks, but...
I have a tablet-pc and if I dare to use ctl-alt-down, my screen rotates upside-down.
and I couldn't see Windows/Preferences - Keys

however...
However, I've now disabled that little-used feature of my graphics driver in favour of the more useful copy line in Eclipse.

and you did lead me to find Windows/Preferences - General/Keys.

Thanks very much - an extremely useful page that one.

I'd found Ctl-Shift-L to get a list of key combinations and hadn't found anything, though now I see Ctl-Alt-down is there - I think the sheer number of shortcuts must have frazzled my brain.

Also Ctl-Alt-Up will duplicate lines.

So, as a summary for anyone interested:

Ctl-Alt-down: copies current line or selected lines to below

Ctl-Alt-up: copies current line or selected lines to above

Ctl-Shift-L: brings up a List of shortcut keys

Window/Preferences - General/Keys: allows you to modify the lot

Is there a keyboard shortcut to duplicate a line of code?
E.g. Ctrl+D deletes current line.

I know I can: move to start of line, select to end of line, copy, paste
...but that's a bit long-winded.

There must be a combination to copy a whole line at once, just like that good old dos editor Brief, but I haven't found it yet. Anyone know if such a shortcut exists?

Can't help about the re-adding it, but if you are running on Windows, did you try restoring them from the Recycle bin?!

I don't believe it!

Yes, it was a basic error, but lead me to erroneously believing I'd been infected with some netster spyware that had somehow gotten into Tomcat!

This: "http://hibernate.sourcefourge.net/hibernate-mapping-2.0.dtd" should have been this:"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd"

Somehow, I managed to type an extra 'u' into sourceforge :roll: .
The domain 'sourcefourge.net' has been taken by netster and the request gets redirected to the netster site, causing my XML to be invalid!

I'd have wasted a lot less time if I'd got an invalid URL message rather than finding netster in my output! Thanks a bunch netster - NOT!

Not amused, but happy to be back in action again.

I considered deleting my former post, but have left it here for the unlikely event that someone else hits the same problem. (And I thought I'd checked that XML soooo carefully!)

For the record, removing that extra 'u' results in a lovely set of creation messages beginning with a 'Mapping Class' message.

[ March 14, 2006: Message edited by: Roger Yates ]

I'm trying to get to grips with Spring/Hibernate/Struts using a cut-down variant of AppFuse. When starting Tomcat (5.5) having deployed my first hibernate definition, I get "Error parsing XML..." as shown in the extract of output below.
INFO - AbstractBeanFactory.getBean(158) | Creating shared instance of singleton bean 'sessionFactory' INFO - Environment.<clinit>(462) | Hibernate 2.1.4 INFO - Environment.<clinit>(491) | hibernate.properties not found INFO - Environment.<clinit>(522) | using CGLIB reflection optimizer ERROR - XMLHelper$ErrorLogger.error(48) | Error parsing XML: XML InputStream(1) The markup declarations contained or pointed to by the document type declaration must be well-formed. ERROR - Configuration.addInputStream(292) | Could not configure datastore from input stream org.dom4j.DocumentException: Error on line 1 of document <a href="http://lb1.netster.com/index.asp?t=0&Site=aGliZXJuYXRlLnNvdXJjWZvdXJnZS5uZXQ=" target="_blank" rel="nofollow">http://lb1.netster.com/index.asp?t=0&Site=aGliZXJuYXRlLnNvdXJjWZvdXJnZS5uZXQ=</a> : The markup declarations contained or pointed to by the document type declaration must be well-formed. Nested exception: The markup declarations contained or pointed to by the document type declaration must be well-formed. at org.dom4j.io.SAXReader.read(SAXReader.java:355) at net.sf.hibernate.cfg.Configuration.addInputStream(Configuration.java:283)

I also notice that the output mentions lb1.netster.com. What is 'netster' doing here? Is it causing me a problem? If so, how do I stop the webserver from looking there?

The xml that should be evaluated is as follows:

<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 2.0//EN" "http://hibernate.sourcefourge.net/hibernate-mapping-2.0.dtd"> <hibernate-mapping> <class name="org.appfuse.model.User" table="app_user"> <id name="id" column="id" unsaved-value="0"> <generator class="increment" /> </id> <property name="firstName" column="first_name" not-null="true"/> <property name="lastName" column="last_name" not-null="true"/> </class> </hibernate-mapping>

Any ideas what could be going wrong?
Assume nothing - I could have made some very basic error!

[ March 14, 2006: Message edited by: Roger Yates ]

'listIdx' with quotes round it is just the string 'listIdx'.
We can assume that list is of type List and so can be accessed using [] with numbers only. So list[1] is fine, and list[someAttributeThatCanConvertToANumber] is also fine. But list["someAttributeThatCanConvertToANumberButWontAsItIsInQuotes"] will not work.

Actually as it stands F also does not work (exception gets thrown for same reason as E).
Here's the error you get for F as it is now:

The EL expression ${list[list['listIdx']]} throws a ServletException
(The "[]" operator was supplied with an index value of type "java.lang.String" to be
applied to a List or array, but that value cannot be converted to an integer.)

I've logged 'F' as an errata, and it's currently in the 'unconfirmed' bucket here:
http://www.oreilly.com/catalog/headservletsjsp/errata/

Nicely done Satguru!

Here's to 94%

Wahay! WINNER


Cheers guys

If you have more than one .jsp page with v2.3 specified, you could add this to your DD:
<jsp-property-group> <url-pattern>*.jsp</url-pattern> <el-ignored>false</el-ignored> </jsp-property-group>
[ October 24, 2004: Message edited by: Roger Yates ]

Did anyone submit it?
http://www.oreilly.com/catalog/headservletsjsp/errata/