Tomi Maila

QUOTE (TobyD @ Nov 4 2008, 04:56 PM)

I'm actually using 8.6 and I only see Remove Element in the property and invoke nodes - not in the register events node.

I didn't read well. Register for Events has a remove element in LV 8.6 but Register for Event Callback does not.

I think Remove element was added in 8.5. Maybe you can open the VI in 8.5 or later and save it back to what ever version you are using.

I would do it with Match Regular Expression that you can find in the String menu. Make a regular expression that matches only the number there that you need to remove and then form the new file name from the before match and after match strings.

Tomi

Andrey suggested to check for input errors while to user is typing the input. I was initially against this idea as it can be very distracting for the user if an error message is displayed when user is correctly entering a value into a control. However, we can alter the value validation algorithm slightly to be used with update value while typing. We can check if the string user is typing can lead into a valid value while user is typing the value. If not, we display an error message. If the beginning of the string is valid, we should not distract the user but let her continue. However, we should not allow user to continue until the value is fully completed.

I edited the example in accordance with these principles. The regular expression for checking partial string is constructed from the regular expression for full strings in the following way. Our full regular expression string consists of several components. A partial string user is typing is valid if it is 1) empty or matches 2) partial first part, 3) first part and partial second part, 4) first and second part and partial third part, and so on. You get the point.

The edited example can be downloaded from the blog.

QUOTE (AndyDm @ Nov 3 2008, 08:45 PM)

The main goal is reducing the number of actions (mouse clicks should be avoided anyway).

This logic assumed:

- when dialog with text field coming, then the focus should be set on the text field.

Ok. I added this functionality to my modified example as well. Thanks for good feedback.

QUOTE (AndyDm @ Nov 3 2008, 08:45 PM)

This can be risky as pressing Esc doesn't in general mean close and loose all my changes. I would force users to actually press cancel button to cancel.

I just posted a new ExpressionFlow article

Enhanced user experience with contextual error messages

Don't hesitate to comment and discuss here on the forums

Tomi

QUOTE (Jim Kring @ Oct 31 2008, 08:45 PM)

[cross-post]

Has anyone done work in LabVIEW with the for RFID readers? I've googled around and didn't find anything.

Any particular reason you do not want to interface the LLRP C libraries?

LOL! I've been away from LAVA for a little while and the discussion has... err... progressed almost beyond alpha strings... I wonder the feelings of those poor NI translators who try to figure out how to translate the new (English?) terms the LabVIEW R&D has come up with this time.

-Tomi

QUOTE (Aristos Queue @ Oct 11 2008, 03:23 AM)

No. But in my opinion, your explanation is useful. See, your pictures are of something you'd like to see, but along the way, your text -- by negation -- generally explains how things work today.

Ok

QUOTE (Aristos Queue @ Oct 10 2008, 05:04 PM)

Just to be clear: the array (single block of memory) is the one that has the "random access" feature, and the linked list is the one that has "serial access" feature. Linked lists can be built in LV using LV classes. You can find an example program here:

http://forums.lavag.org/post-a7270-LinkedList.zip

Detailed explanation of how it works can be found here:

http://expressionflow.com/2008/01/07/recur...ures-type-safe/

Do you mean that you've silently implemented type recursion to LabVIEW that the ExpressionFlow article is about?

QUOTE (JFM @ Sep 20 2008, 10:26 AM)

I would go for one repository per project (or closely related projects, e.g. per customer)

I second JFM here. It is commong that when working on a project, you end up developing reusable code. I think it is a good practice to separate reusable parts of project to their own repositories, when they mature. Then you should build reusable libraries some sort of installable packages and install them into into vi.lib or user.lib to be used in projects. I think currenlty http://jkisoft.com/vipm/' rel='nofollow' target="_blank">JKI Soft VIPM is the best tool for managing reusable libraries. This way you can limit your customers or partners not to have access to the source code of all your reusable libraries but only to the source code relevant to their project. This also forces you to think more of the reusability of software modules and you'll end up working more efficiently in the long run.

I found a comparison chart on subversion hosting providers. Don’t read the chart literally, as most providers do have multiple products and not all products are listed. Rather take it as a list of subversion hosting providers aand check yourself what kind of solutions they provide. Not that many subversion hosting companies provide services for open source projects only.

Toby, that is a good point. However you must also consider if your intellectual property is actually more safe on a managed third party server or on your own server where security issues are patched on a random basis.

SMS Service is a very general word. Do you mean either sending SMS with a GSM modem or interfacing to an operator SMS messaging center and sending/receiving large amounts of messages. I guess the former solution is already discussed. For the latter, install for example Kannel to a unix box and interface Kannel with LabVIEW using simple HTTP requests.

http://kannel.org

This is a discussion topic to my latest article

Subversion hosting - a simple path to LabVIEW source code control

Tomi

QUOTE (PaulG. @ Aug 14 2008, 08:22 PM)

And ... on a lighter note ... some physicists are concerned about the possiblity of the CERN creating, among other exotic things, a mini black hole that could escape, orbit through the earth and gradually swallow us up in a matter of days …

Luckily all educated physicists have read their Wheeler and know that small black holes would radiate so much hawking radiation that they would 'evaporate' or explode instantly. Actually I don't think an explosion of a mini black hole would look so much different from what ever happens in a proton collision anyway.

If you're into physics and have not yet seen this awesome video of LHC at CERN, go ahead and click play.

Cool There is one weakness I noticed by inspecting the code. The result will be incorrect if the delay between consequetive calls is more than 2^32 ms.

QUOTE (crelf @ Aug 2 2008, 06:36 PM)

Yep - no problems here...

I managed to install LV 8.6 on my home computer with (only) LV 8.5.1 installed. I have no NI device drivers installed.

This is not an application modification challenge. However I'd like to see an implementation of some cryptography libraries natively on LabVIEW. Most interesting of those would be a stream chipher library, maybe RC4.

Thanks for catching this major bug AQ! Do you already know if you manage to fix it for the maintenance release of winter 2009? Does anyone come up with a good workaroung?

For those of you who had problems watching the embedded video from Vimeo, the video is now available from YouTube as well.

QUOTE (TobyD @ Jul 9 2008, 06:11 PM)

Excellent video Tomi! And let me be the first to say thank you for not using youtube. The increased resolution of vimeo is nice. Did you set up a green screen to insert the expression flow background? Very cool!

Thanks I was using Vimeo because of the excellent 1280x720p HD quality, as it provides ability to download videos and as some users tend to have problems accessing YouTube because of corporate "security" policies.

About green screen, I spent a few weeks painting the ExpressionFlow background to our living room wall You can imagine how lot of and how detailed work that was

Ben,

You may want to take a look at OpenG Active Object Template(.opg) that is part of class templates I wrote for LVOOP. See OpenG Wiki for more details. Active Object Template is a template for by-reference objects that include a single VI that starts executing when an object instance is created and stops executing when the object instance is closed. The template is meant to be used with Endevo GOOP tool but you can simply create a copy of the class from within LabVIEW as well to use it in your project. Use VIPM to install the template to <LabVIEW>resource\OpenG\openg_object\class_templates. The template requires OpenG Object package to be installed as well.

QUOTE (Ton @ Jul 7 2008, 08:41 PM)

What program have you used to capture your screen activities, I've used Jing but found it is not real-time.

I've used CamStudio beta together with Lagarith lossless codec. The audio sync sucks and therefore I don't use CamStudio to capture audio. I edit the videos with Sony Vegas Pro 8.

QUOTE (neB @ Jul 7 2008, 01:47 PM)

I need to watch the next nine episodes before noon today so I can stay productive.

I'm afraid you will need to stay unproductive for a while