CodingClues - Latest Comments

Re: Cloud42 - GUI and Web service interface for Amazon EC2

swarovski uk — Tue, 01 Nov 2011 04:19:55 -0000

(or by using the GUI). A notification mechanism following the
publish/subscribe pattern allows you to subscribe any endpoint to
events that occur on an AMI instance.

Re: Using SQL LIKE with find in Ruby On Rails

Trejkaz — Wed, 04 Feb 2009 19:46:33 -0000

Don't forget to also escape the \ itself.

Re: Displaying affilinet earnings in an RSS feed

front door locks — Wed, 04 Feb 2009 13:31:36 -0000

Im wondering if this would work with adsense or other affiliate networks as well?

Re: Problems with Assertions in JUnit tests using Eclipse

deepakp9 — Tue, 20 Jan 2009 09:35:42 -0000

Eclipse v. 3.1comes with JUnit built into the Workbench. Eclipse allows you to quickly create test case classes and test suite classes to write your test code in. With Eclipse, Test Driven Development (TDD), becomes very easy to organize and implement.

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Re: The SQuirreL 100 rows problem

Priti — Thu, 15 Jan 2009 11:16:03 -0000

In the file C:\Documents and Settings\<user>\.squirrel-sql\prefs.xml Change the tag called <sqllimitrows> to 'false'

<sqllimitrows>false</sqllimitrows>

</sqllimitrows></user>

Re: Drawing in Java

Frank — Mon, 05 Jan 2009 06:44:45 -0000

The screenshot is from GTD-Manager, a project management tool. Drawing was used in this application to visualize Gantt-Diagrams. See http://gtd-manager.de for details (it's a German website).

Re: Drawing in Java

Dave — Fri, 05 Dec 2008 06:16:00 -0000

Can you tell me, where is this screenhsot from? ;)
I'm interested about this...
Thaks!

Re: Automatically Scrolling Down in a JTextArea

Halil — Wed, 26 Nov 2008 13:19:53 -0000

This is not automatic scrolling. this is programatic scrolling. This should be controlled through a boolean property of the component. But as far as I know, Swing API does not support this.

Re: Randomness

Jackp — Thu, 30 Oct 2008 05:29:34 -0000

I've tested his PHP code and got a perfectly random bitmap, far from what he got. I'm using PHP 5 on linux.

Re: Randomness

Dale — Wed, 29 Oct 2008 21:29:24 -0000

I'm not sure why one would plot coin-flip random result on a plot like this. When I first saw the pic, I assumed that each point was a random pick on the plot area (in this case both x and y coordinates would be a random number from 0 to 512). If you did this enough times, you would expect more and more of the area to be plotted. Right? That would seem to be a better visual representation of randomness.

Re: Randomness

Kas Thomas — Wed, 29 Oct 2008 15:25:13 -0000

If I may make a suggestion: Try plotting a 3D graph rather than a 2D graph. This will make deviations from "random" easier to see. You may be surprised at what you find. ;^)

Thanks for an excellent post.

Re: Preventing Database Race Conditions

Tobias — Tue, 30 Sep 2008 05:51:57 -0000

yeah all this should be no big deal when you are using mysql 5 w/ transactions (which i'm not and was not refering to in this article)
thx

Re: Preventing Database Race Conditions

lino — Tue, 30 Sep 2008 05:34:51 -0000

When your racing inserts are not using the same DB connection then at least mysql_insert_id() will work, as that is just a wrapper to a C API call and said call is "client-connection-aware".
I am not sure about the SELECT LAST_INSERT_ID though, that might actually be a problem (if not client-connection-aware), although inside of a transaction it should work even with concurrent inserts from other threads.

Re: Preventing Database Race Conditions

Tobias — Tue, 30 Sep 2008 05:16:01 -0000

thanks, never heared of this LAST_INSERT_ID statement before
I had abstracted from the actual PHP code in this example (therefore no identifier)

Re: Preventing Database Race Conditions

Sebastian — Tue, 30 Sep 2008 05:14:51 -0000

I already pointed that out to Tobias.

However, the problem is, when you have e.g. 2 racing inserts, you only get the last ID of the two, but not the last two IDs. For Tobias' application, he needed exactly the one ID that he used in his INSERT, not the last one.

Re: Why can’t website forms be more intelligent?

lino — Tue, 30 Sep 2008 05:00:34 -0000

@Steve
The funny thing is, the BROWSER should give the feedback that your form is being send, but if you look at IE7 or IE8, you can hardly tell it anymore. So now the web developers have to add behaviour to all of their forms or the users will start to "whine".
Not trying to defend the "users are stupid" pseudo-argument, just pointing out that the responsibility to provide the clearly needed feedback seems to have shifted from the browser to the web application and basically the web developers take the blame for the mistakes of the browser developers now.

Of course Markus is right, a simple nonce can prevent most problems from double submissions. That doesn't solve the lack of feedback, but it at least prevents corrupted data.

Re: Unobtrusive JavaScript: Separating Scripting From Markup

lino — Tue, 30 Sep 2008 04:50:21 -0000

With a good JS framework the page should not be harder to debug when adding the event handlers in a seperate script block. Actually, from my experience it is easier to debug, as the frameworks all make sure your event handler will recieve the event as first argument, no matter if you call the input parameter event (will work in IE) or for example evt (will not work in IE when used in onclick-attribute).
Additionally, if you add your event handlers to single elements in an window.onload event handler (or even better, listen to dom:loaded), you avoid errors in event handler functions (imagine your onclick handler will change the innerHTML of another element that comes later in the DOM).
The non-functional period is not a valid point in my opinion. The whole point of unobtrusive JavaScript is to markup your page in such a way, that it will work with JavaScript turned off. The JavaScript will then add additional features that increase the usability or the efficency.
If your page doesn't "work" when the dom is completly loaded (and rendered), but the JavaScript isn't yet, then we are not talking about unobtrusive JavaScript. In that case you should hide elements that require JavaScript event handlers and show them via JavaScript after the event handlers were added.

Re: Preventing Database Race Conditions

lino — Tue, 30 Sep 2008 04:38:17 -0000

While your solution might work, mysql_insert_id() or, if you are using a BIGINT as auto_increment mysql_query('SELECT LAST_INSERT_ID() FROM table') is the better solution. Don't forget to pass the resource_identifier of your mysql connection. And I ideally, if you are using MySQL 5, encapsulate the whole operation into a transaction.

Re: RichFaces: rich:modalPanel with rich:componentControl doesn’t show data

Sumeet Singh — Wed, 10 Sep 2008 08:14:25 -0000

hi, i m new to this. and facing the same problem.
kindly send some code sample

Re: RichFaces: rich:modalPanel with rich:componentControl doesn’t show data

Jalejo — Thu, 04 Sep 2008 11:59:25 -0000

Hi. already works. I change the button for link:

See details...

The actionParameter not works good, I has a javascript error when use actionParameter. Whit f:param, all works OK. Thanks....

Re: RichFaces: rich:modalPanel with rich:componentControl doesn’t show data

Jalejo — Thu, 04 Sep 2008 08:26:58 -0000

Hi. like say Michael, the explanation is great, I understood all, but in the practice, It not works.
The value dataId in the popupBean is never asigned, and when I click the button, the navigator show an javascript error altough show the popup panel, but without data. I don't why.
I need help!!

Re: RichFaces: rich:modalPanel with rich:componentControl doesn’t show data

guruz — Thu, 04 Sep 2008 02:08:44 -0000

Hi Michael,
Frank is currently on holiday. I have e-mailed him your comment, maybe he can manage to reply :)

Re: RichFaces: rich:modalPanel with rich:componentControl doesn’t show data

Michael — Wed, 03 Sep 2008 19:39:32 -0000

Frank, your explanation is great! Thank you so much!
I'm new to JSF and almost commited suicide trying to solve this problem :) Could you please also explain the hint you mentioned at the end? I tried to rerender the whole modal panel and then it's really not shown at all, and I can't figure out why...
Thank you very much in advance!

Re: Eclipse: IWAE0010E An internal error occurred

Anonymous — Tue, 29 Jul 2008 15:48:25 -0000

I'm having the same problem in Eclipse 3.3.2.

Re: The SQuirreL 100 rows problem

Frank — Fri, 18 Jul 2008 02:27:34 -0000

Sure? For me, the solution posted by squirreldev worked.