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  • Personal Project - Next practical language/tech to learn

    - by Paul Nathan
    I'm working on a personal project doing some finance analysis. It's a totally new field for me, and I'm really having fun with it so far, plus working in the high-level language arena is a great break from my embedded systems daytime work. I have a MySQL backend on a non-local server with a pile of stock data. My task now is to do some analysis of the stocks and produce something approximating a useful result. There are a couple technical difficulties. (1) I have a lot of records. To be precise, I believe I'm near 100K records right now, and this number grows by 6.1K each weekday. I need to create a way to rummage through these fields and do data analysis - based on a given computation, go look at this other set. Fine and dandy, nothing too outre. But this means I could really use a straightforward API for talking to MySQL. (2) Ideally, it runs on OS X 10.4.11. No Windows/Linux machine at home. (3) I can use PHP, C++, Perl, etc. I even have an R installation. I'm pretty flexible with stuff, so long as it runs on OS X. (Lots of options here, pick water, H20, or dihydrogen monoxide ;-) ) (4)Lack of hassle. While I like clever and fun ways of doing things, I'm trying to get some analysis done, not spend ten hours doing installation work and scratching my head figuring out a theoretical syntax question needed to spout out "hello world". What's the question? I'd like to dig into something different than my usual PHP/C++/C toolset. I'm looking for recommendations for languages/technologies that will assist me and meet the above requirements. In particular, I've heard a lot of buzz about F# and Python on SO. I've used CLISP for small problems before, and kinda liked it. I'm seeking opinions about those in particular. edit:since I rent the DB server and have a limited amount of CPU time online, I'm trying to do the analysis on a local machine.

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  • Why is my addSubview: method causing a leak?

    - by Nathan
    Okay, so I have done a ton of research on this and have been pulling my hair out for days trying to figure out why the following code leaks: [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; UIImage *comicImage = [self getCachedImage:[NSString stringWithFormat:@"%@%@%@",@"http://url/",comicNumber,@".png"]]; self.imageView = [[[UIImageView alloc] initWithImage:comicImage] autorelease]; [self.scrollView addSubview:self.imageView]; self.scrollView.contentSize = self.imageView.frame.size; self.imageWidth = [NSString stringWithFormat:@"%f",imageView.frame.size.width]; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; Both self.imageView and self.scrollView are @propety (nonatomic, retain) and released in my dealloc.. imageView isn't used anywhere else in the code. This code is also run in a thread off of the main thread. If I run this code on my device, it will quickly run out of memory if I continually load this view. However, I've found if I comment out the following line: [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; UIImage *comicImage = [self getCachedImage:[NSString stringWithFormat:@"%@%@%@",@"http://url/",comicNumber,@".png"]]; self.imageView = [[[UIImageView alloc] initWithImage:comicImage] autorelease]; //[self.scrollView addSubview:self.imageView]; self.scrollView.contentSize = self.imageView.frame.size; self.imageWidth = [NSString stringWithFormat:@"%f",imageView.frame.size.width]; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; Memory usage becomes stable, no matter how many times I load the view. I have gone over everything I can think to see why this is leaking, but as far as I can tell I have all my releases straight. Can anyone see what I am missing?

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  • jQuery/Ajax with Zend Framework

    - by Nathan
    I've been tinkering around with Zend-Framework and Jquery for a month or so, and finally started tinkering with them together using ZendX_JQuery. It seems I've ran into something that at first seemed it should be simple, So maybe I'm just missing something here. I have a view along the lines of: $this->ajaxLink( $this->escape($var->title), $this->baseUrl() . "/another/action", array('update' => '#domain' . $var->id , 'complete' => '$("#domain' . $var->id .'").toggle("slow");')); echo '<div id="domain"' . $var->id . '" style="display:none;" ></div>'; Which works correctly, when the link displayed by the code above is clicked it loads the contents returned from /another/action into the domain"id" div. The problem occurs when the view loaded by the above contains an ajaxLink() the ajax link stops working. This can be fixed by adding an option to the ajaxLink() array "inline" = true but what if I need other JQuery views helpers to work when loaded into the page via ajax i.e. dialogContainer() I guess I could simply be asking how to control where zendx jquery helper puts java script. by default it is trying to put all statments in the <head> section in a single <script> tag. I need away around that for views displayed from an ajax call. Does Dojo try and force all php rendered javascript/ajax into the head also? Thanks.

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  • Removing file from Mercurial MQ Patch

    - by Nathan Lee
    I have large MQ patch applied in Mercurial. What has happened is I have done qrefresh and included files in my patch that I do not want to include. Is there a way to remove the changes to these file from my patch with out manually editing it? In this case if I was just working without MQ, all I would have to do is hg revert.

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  • Error With Foundation.h

    - by Nathan Campos
    Hello, I learning Objective-C in Linux(Ubuntu), but when i tryed to compile my application that needs the Foundation headers i got an error saying that the file cannot be found, but i have installed the GNUstep development package(gnustep-devel). Here is my code: // Fraction.h #import <Foundation/NSObject.h> @interface Fraction: NSObject { int numerator; int denominator; } - (void) print; - (void) setNumerator: (int) n; - (void) setDenominator: (int) d; - (void) numerator; - (void) denominator; @end And here is the console log: ubuntu@eeepc:~$ gcc main.m -o frac -lobjc In file included from main.m:3: Fraction.h:2:26: error: objc/NSObject.h: No such file or directory In file included from main.m:3: Fraction.h:4: error: cannot find interface declaration for ‘NSObject’, superclass of ‘Fraction’ ubuntu@eeepc:~$ What i need to do?

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  • Learning HyperCard

    - by Nathan Campos
    I've got HyperCard 2.4.1 for my Mac 7.5.5. Then I want to know where I can learn, for free and some books to buy too, but I'm now focusing on the free things. I've got HyperCard because of the suggestion of S Ben.

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  • WML And Downloads

    - by Nathan Campos
    I'm now playing with WML and WMLScript, but I'm doing a site that will have some content to download(some txt, doc, bmp, mpg, avi and jpg files), but some of my friends(that never developed in this language, just used the technology on the beginning) said that it's impossible. Then here are my questions: It's possible? How to do it? Remember that I'm using PHP combined with WML.

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  • Video Synthesis - Making waves, patterns, gradients...

    - by Nathan
    I'm writing a program to generate some wild visuals. So far I can paint each pixel with a random blue value: for (y = 0; y < YMAX; y++) { for (x = 0; x < XMAX; x++) { b = rand() % 255; setPixelColor(x,y,r,g,b); } } I'd like to do more than just make blue noise, but I'm not sure where to start (Google isn't helping me much today), so it would be great if you could share anything you know on the subject or some links to related resources.

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  • Silverlight vs web 2.0

    - by nathan gonzalez
    i understand that silverlight has come a long way since its inception, but i have always struggled to find the business need for silverlight. i'd love to hear the advantages and disadvantages of silverlight 4.0 vs modern html5 and javascript libraries like jQuery or ExtJS from some people who are more in the know than i am. is silverlight the way of the future or a stumbling block on the path to a plugin free web?

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  • What's your favorite vim color scheme?

    - by Nathan Long
    Wwhat is your favorite vim color scheme? I haven't found a great one yet, but what I'd like, in order of priority, are: Never confuses me. For example: When matching braces are highlighted, it's easy to see where the cursor is When I've got two or more tabs open, I can read all the titles and easily tell which one is active (maybe inactive ones look faded out) Very readable, both for regular code and for highlighting It would be nice if it was attractive I found one scheme that was ALMOST perfect (peaksea), but not quite - I couldn't read the titles of non-active tabs. So on a related note: anybody know a clear reference page for tweaking the colors of specific items?

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  • Data store for capturing votes & aggregating them

    - by Nathan de Vries
    I'm interested in using Node.js as a socket server for stream-based communication with tens of thousands of clients. Clients will be sending votes for particular pieces of content, and receiving near-realtime updates of aggregated vote tallies from the server. The datastore needs to support: Storing the votes Summarising the votes in near-realtime Preventing multiple votes within an arbitrary time period (e.g. clients can only vote once for a piece of content every 1 minute) Something that already has client libraries for Node.js would be preferable.

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  • Drag and Drop to a Powershell script

    - by Nathan Hartley
    I thought I had an answer to this, but the more I play with it, the more I see it as a design flaw of Powershell. I would like to drag and drop (or use the Send-To mechanism) to pass multiple files and/or folders as a array to a Powershell script. Test Script #Test.ps1 param ( [string[]] $Paths, [string] $ExampleParameter ) "Paths" $Paths "args" $args I then created a shortcut with the following command line and dragged some files on to it. The files come across as individual parameters which first match the script parameters positionally, with the remainder being placed in the $args array. Shortcut Attempt 1 powershell.exe -noprofile -noexit -file c:\Test.ps1 I found that I can do this with a wrapper script... Wrapper Script #TestWrapper.ps1 & .\Test.ps1 -Paths $args Shortcut Attempt 2 powershell.exe -noprofile -noexit -file c:\TestWrapper.ps1 Has anyone found a way to do this without the extra script?

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  • JVM/CLR Source-compatible Language Options

    - by Nathan Voxland
    I have an open source Java database migration tool (http://www.liquibase.org) which I am considering porting to .Net. The majority of the tool (at least from a complexity side) is around logic like "if you are adding a primary key and the database is Oracle use this SQL. If database is MySQL use this SQL. If the primary key is named and the database is Postgres use this SQL". I could fork the Java codebase and covert it (manually and/or automatically), but as updates and bug fixes to the above logic come in I do not want to have to apply it to both versions. What I would like to do is move all that logic into a form that can be compiled and used by both Java and .Net versions naively. The code I am looking to convert does not contain any advanced library usage (JDBC, System.out, etc) that would vary significantly from Java to .Net, so I don't think that will be an issue (at worst it can be designed around). So what I am looking for is: A language in which I can code common parts of my app in and compile it into classes usable by the "standard" languages on the target platform Does not add any runtime requirements to the system Nothing so strange that it scares away potential contributors I know Python and Ruby both have implementations on for the JVM and CLR. How well do they fit my requirements? Has anyone been successful (or unsuccesful) using this technique for cross-platform applications? Are there any gotcha's I need to worry about?

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  • Create window as child in third party application.

    - by Nathan W
    I'm trying to get my C# form to be parented correctly in a third party app, I have the handle to the control that I would like my form parented to but just can't seem to get it to work. I would like to create my form so that it is part of the MDIClient, handle 005E0ED6. Just like Window 01D7157D. Is this possible? If so can it be done in C#?

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  • Create window as child in third party application.

    - by Nathan W
    I'm trying to get my C# form to be parented correctly in a third party app, I have the handle to the control that I would like my form parented to but just can't seem to get it to work. I would like to create my form so that it is part of the MDIClient, handle 005E0ED6. Just like Window 01D7157D. Is this possible? If so can it be done in C#?

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  • Pattern matching in Perl ala Haskell

    - by Paul Nathan
    In Haskell (F#, Ocaml, and others), I can do this: sign x | x > 0 = 1 | x == 0 = 0 | x < 0 = -1 Which calculates the sign of a given integer. This can concisely express certain logic flows; I've encountered one of these flows in Perl. Right now what I am doing is sub frobnicator { my $frob = shift; return "foo" if $frob eq "Foomaticator"; return "bar" if $frob eq "Barmaticator"; croak("Unable to frob legit value: $frob received"); } Which feels inexpressive and ugly. This code has to run on Perl 5.8.8, but of course I am interested in more modern techniques as well.

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  • iframe as scriptaculous droppable

    - by Nathan
    I have a sortable list and an iframe on the same page. What I'm trying to do is define the <iframe> as a Droppable. Everything works with out errors but when I try to drag a sortable item across the Iframe it stops at the edge. ( if I move it slowly it seems works in firefox) The Iframe is set to DesignMode ="on" so covering it with a transparent element to act as the droppable does not seem applicable here. Anyone know of any other solutions or a better way to handle this?

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  • Where do I find a list of changes and bug fixes for .Net classes from 3.5 -> 4.0?

    - by Nathan Ridley
    I'm having trouble finding a list of the changes and bug fixes that have been made in the .Net framework for .Net 4.0. They're not easy to find, but surely they exist somewhere? Specifically I want to find out what changes and updates have been made for System.Net.HttpWebRequest and System.Net.CookieContainer, as both are quite bugridden in 3.5 and I want to evaluate whether I should write my code for .Net 4.0 or if I should create some custom classes to work around their issues.

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  • Why does Chrome ignore local jQuery cookies?

    - by Nathan Long
    I am using the jQuery Cookie plugin (download and demo and source code with comments) to set and read a cookie. I'm developing the page on my local machine. The following code will successfully set a cookie in FireFox 3, IE 7, and Safari (PC). But if the browser is Google Chrome AND the page is a local file, it does not work. $.cookie("nameofcookie", cookievalue, {path: "/", expires: 30}); What I know: The plugin's demo works with Chrome. If I put my code on a web server (address starting with http://), it works with Chrome. So the cookie fails only for Google Chrome on local files. Possible causes: Google Chrome doesn't accept cookies from web pages on the hard drive (paths like file:///C:/websites/foo.html) Something in the plugin implentation causes Chrome to reject such cookies Can anyone confirm this and identify the root cause?

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  • Can I tweak a page's appearance using Google Chrome's developer tools?

    - by Nathan Long
    When I'm working on a web page layout, I often use Firefox and Firebug to tweak the CSS until it looks right, then modify my style sheet to match. Right now, I'm trying to fix something that looks fine in other browsers but wrong in Google Chrome. I have pulled up Chrome's Developer Tools, and can inspect the computed style, but don't see a way to edit values and see the results on my page. Is there a way to do this?

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