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  • Python turtle module confusion

    - by John
    Hi, I'm trying to to add more lines to the triangle, so instead of 3 leading off there will be 5 depending on the parameter given but I really have no idea what to do at this stage and any help would be very welcome. Thanks in advance!:) def draw_sierpinski_triangle(tracer_on, colour, initial_modulus, line_width, initial_heading,initial_x, initial_y, steps): turtle=Turtle() turtle.name = 'Mother of all turtles' turtle.reset () turtle.tracer (tracer_on) turtle.speed ('fastest') turtle.color (colour) turtle.width (line_width) turtle.up() turtle.goto (initial_x, initial_y) turtle.down() turtle.set_heading (initial_heading) draw_sub_pattern (tracer_on, turtle, initial_modulus, 0, steps) def draw_sub_pattern (tracer_on, turtle, modulus, depth, steps): if (depth >= steps): return; x, y = turtle.position () heading = turtle.heading () # draw the pattern turtle.up() turtle.down() turtle.forward (modulus) draw_sub_pattern(tracer_on, turtle, modulus * 0.5, depth + 1, steps) turtle.up() turtle.goto(x, y) turtle.down() turtle.set_heading (heading + 120) turtle.forward (modulus) draw_sub_pattern(tracer_on, turtle, modulus * 0.5, depth + 1, steps) turtle.up() turtle.goto(x, y) turtle.down() turtle.set_heading (heading + 240) turtle.forward (modulus) draw_sub_pattern(tracer_on, turtle, modulus * 0.5, depth + 1, steps)

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  • Detect car acceleration in Android app?

    - by Stud33
    I want to incorporate some Accelerometer code into a Android application im working and want to see if this is possible. Basically what I need is for the code to detect car acceleration motion. I am not wanting to determine speed with the code but just distinguish if the phone is in a car and has accelerated motion (Hence the car is moving for the first time). I have gone through many different accelerometer applications to see if this motion produces a viable profile to go off of and it appears it does. Just looking for something that popups a "Hello World" dialog when it detects your in the car and its moving for the first time down the street. Any help would be appreciated and a simple yes or no its possible would work. I would also be interested in compensating anyone that is capable of doing this as well. I need this done like yesterday so please let me know. Thank You, JTW

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  • How does Alpha Five Version 10 Rate for Web App Development

    - by Gary B2312321321
    I came across this RDMS via the advert on stackoverflow. Seems to be in the vein of MS Access / Filemaker / Apex database development tools but focused on web based applications. It quotes rave reviews from EWeek and a favourable mention from Dr Dobbs regarding its ability to create AJAX web applications without coding. The Eweek review, apparently written by an ASP.NET programmer, goes on to proclaim the ease at which apps can be extended using the inbuilt XBasic language and how custom javascript can easily be added without wading through code. Has anyone here built a web app with Alpha 5? Does anyone have comments on the development process, the speed of it or limitations they encountered along the way? To me it seems Oracle APEX comes closest to the feature set, has anyone programmed in both and have any comments?

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  • VS 2008 SP1 text editor flickering over remote desktop connection

    - by AltairDusk
    I am connecting from a Windows 7 x64 machine to my dev machine running Windows XP SP3 using the built in remote desktop client. For most apps it works fine with no problems, for Visual Studio whenever I am typing the entire text editor keeps redrawing. I stumbled across this question: http://stackoverflow.com/questions/873849/vs-2008-sp1-over-remote-desktop-constant-repainting and I have tried all of the suggestions in it to no effect, including resetting all VS settings back to default then disabling the suggested settings. Has anyone found a reliable solution to this? I feel like I'm going insane with the screen constantly refreshing when I'm working from home. Some additional information: Remote Desktop is set to run at 1680x1050, 15bit color, Low-speed broadband for the experience setting with all but Visual styles and Persistent bitmap caching unchecked. Visual Studio 2008 Team System is running on the dev machine with Service Pack 1 and Power Commands installed.

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  • Optimising SQL distance query

    - by Alex
    I'm running an MySQL query that returns results based on location. However I have noticed recently that its really slowing down my PHP app. I used CodeIgniter and the profiler shows the query taking 4.2seconds. The geoname table has 500,000 rows. I have some indexes on the key columns, how else can speed up this query? Here is my SQL: SELECT `products`.`product_name`, `geoname`.`geonameid`, `geoname`.`latitude`, `geoname`.`longitude`, `products`.`product_id`, AVG(ratings.vote) as rating, count(comments.comment_id) as total_comments, (6371 * acos(cos(radians(38.7666667)) * cos(radians(geoname.latitude)) * cos(radians(geoname.longitude) - radians(-3.3833333)) + sin(radians(38.7666667)) * sin(radians(geoname.latitude)))) AS distance FROM (`foods`) JOIN `geoname` ON `geoname`.`geonameid` = `products`.`geoname_id` LEFT JOIN `ratings` ON `ratings`.`var_id` = `products`.`product_id` LEFT JOIN `comments` ON `comments`.`var_id` = `products `.`product_id` WHERE `products`.`product_id` != 82 GROUP BY `products`.`product_id` HAVING `distance` < 99 ORDER BY `distance` LIMIT 10

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  • Quicker searching in JScript using the Bash

    - by gentlesea
    I am using the following JScript code to search for a string inside a file: var myFile = aqFile.OpenTextFile(fileToSearchIn, aqFile.faRead, aqFile.ctANSI); while(!myFile.IsEndOfFile()) { s = myFile.ReadLine(); if (aqString.Find(s, searchString) != -1) Log.Checkpoint(searchString + " found.", s); } myFile.Close(); This is rather slow. I was thinking about using bash commands in order to speed up the search in file process: var WshShell = new ActiveXObject("WScript.Shell"); var oExec = WshShell.Exec("C:\\cygwin\\bin\\bash.exe -c 'cat \"" + folderName + "/" + fileName + "\"'"); while (!oExec.StdOut.AtEndOfStream) Log.Checkpoint(oExec.StdOut.ReadLine()); while (!oExec.StdErr.AtEndOfStream) Log.Error(oExec.StdErr.ReadLine()); Since every time bash.exe is started a new window opens the searching is not faster than before. Is there a possibility to have the bash run in the background using another switch?

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  • Change compilation flags in Qt under Mac OS X?

    - by Lior
    I installed Qt for Mac, and am compiling my Qt project after adding in the .Pro file CONFIG(release, debug|release):QMAKE_CXXFLAGS += -O3 -fomit-frame-pointer to optimize for speed. However, I always see that the command where g++ is ran, includes -Os, which optimizes for size. I would like to remove it. I tried several approaches, like CONFIG(release, debug|release):QMAKE_CFLAGS_RELEASE -= -Os CONFIG(release, debug|release):QMAKE_CXXFLAGS -= -Os and CONFIG(release, debug|release):QMAKE_CXXFLAGS = -O3 -fomit-frame-pointer CONFIG(release, debug|release):QMAKE_CFLAGS_RELEASE = -O3 -fomit-frame-pointer (no +) But nothing. -Os ALWAYS appear. How do I change this? I found the qmake.conf file under /usr/local/QT4.5/mkspecs. It includes a mac-g++.conf file, but I cannot change it, and chmod doesn't work: chmod: mac-g++.conf: Operation not permitted Any ideas?

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  • HTTP redirect fallback

    - by Ondrej Stastny
    Hi, Is there a way to provide fallback URL when HTTP redirect times out? What I'm trying to achieve is that when I hit the original url, I would respond with HTTP redirect (300, 307?) giving the browser new URL and the fallback URL in case the new URL times out? I was also considering doing this client side but it just does not seem to be very effective (in terms of speed, client support). What I would do is probably have a tiny 1x1px image on each server, try loading it and then check with javascript which server is up and redirect there. Any other ideas? Thanks

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  • javascript removeChild() and appendChild() VS display=none and display=block|inline

    - by Kucebe
    I'm developing a web application that shows some controls and descriptions dinamically (I don't want to use jQuery or other libraries). At this moment i make appear and disappear controls using: element.setAttribute("style", "inline"); and element.setAttribute("style", "none"); but i'm thinking about using: element.appendChild(childRef); and element.removeChild(childRef); So, which one is the best solution in terms of system speed and elegance of the code? (and of course, are there better solution?)

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  • How to prepare for a Java test?

    - by Zenzen
    Ok so in two days I have a test for my dream job (well it's an internship, but still!) and for quite some time now I've been reading the SCJP Guide book in order to prepare myself. BUT seeing how slow my reading speed is I guess finding a website with some "java essentials" or "standard java test questions" and going through it in those 2 days would be a better idea. Don't misunderstand me, I do have java experience and it's "only" an internship, but we all know how programming tests look like and how tricky they can be. So are there any online resources you could recommend me? I know 2 days is not much, but well I was informed bout the test 1-2days ago.

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  • using document.createDocumentFragment() child dom elements that contain jQuery.data

    - by taber
    I want to use document.createDocumentFragment() to create an optimized collection of HTML elements that contain ".data" coming from jQuery (v 1.4.2), but I'm kind of stuck on how to get the data to surface from the HTML elements. Here's my code: var genres_html = document.createDocumentFragment(); $(xmlData).find('genres').each(function(i, node) { var genre = document.createElement('a'); $(genre).addClass('button') .attr('href', 'javascript:void(0)') .html( $(node).find('genreName:first').text() ) .data('genreData', { id: $(node).find('genreID:first').text() }); genres_html.appendChild( genre.cloneNode(true) ); }); $('#list').html(genres_html); // error: $('#list a:first').data('genreData') is null alert($('#list a:first').data('genreData').id); What am I doing wrong here? I suspect it's probably something with .cloneNode() not carrying over the data when the element is appended to the documentFragment. Sometimes there are tons of rows so I want to keep things pretty optimized, speed-wise. Thanks!

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  • Create date efficiently

    - by Dave Jarvis
    On Pavel's page is the following function: CREATE OR REPLACE FUNCTION makedate(year int, dayofyear int) RETURNS date AS $$ SELECT (date '0001-01-01' + ($1 - 1) * interval '1 year' + ($2 - 1) * interval '1 day'):: date $$ LANGUAGE sql; I have the following code: makedate(y.year,1) What is the fastest way in PostgreSQL to create a date for January 1st of a given year? Pavel's function would lead me to believe it is: date '0001-01-01' + y.year * interval '1 year' + interval '1 day'; My thought would be more like: to_date( y.year||'-1-1', 'YYYY-MM-DD'); Am looking for the fastest way using PostgreSQL 8.4. (The query that uses the date function can select between 100,000 and 1 million records, so it needs speed.) Thank you!

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  • Is yield break equivalent to returning Enumerable<T>.Empty from a method returning IEnumerable<T>

    - by Mike Two
    These two methods appear to behave the same to me public IEnumerable<string> GetNothing() { return Enumerable.Empty<string>(); } public IEnumerable<string> GetLessThanNothing() { yield break; } I've profiled each in test scenarios and I don't see a meaningful difference in speed, but the yield break version is slightly faster. Are there any reasons to use one over the other? Is one easier to read than the other? Is there a behavior difference that would matter to a caller?

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  • Rendering to a single Bitmap object from multiple threads

    - by Lee Treveil
    What im doing is rendering a number of bitmaps to a single bitmap. There could be hundreds of images and the bitmap being rendered to could be over 1000x1000 pixels. Im hoping to speed up this process by using multiple threads but since the Bitmap object is not thread-safe it cant be rendered to directly concurrently. What im thinking is to split the large bitmap into sections per cpu, render them separately then join them back together at the end. I haven't done this yet incase you guys/girls have any better suggestions. Any ideas? Thanks

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  • a loading screen for a c# wpf listbox

    - by evan
    I'm using a list box where there are on average about 500 thumbnails (items) that can be sorted and searched. Since I'm using default databinding and search descriptors (which I've heard are slow due to reflection) the list takes a noticeable pause of a few seconds loading, sorting, and searching (the list dynamically updates based on the contents of the search box so the first one or two letters typed are really slow). I don't think I can fully do away with reflection give the timeframe for the project, and speed isn't super essential, but I'd like some kind of graphical indication of the delay so it doesn't confuse the user. How could I do something like a website video loading screen where the listbox grays out and some kind of loading circle indicates it's processing until the list is ready? Or even just grayed out with the words "Loading..." for a few seconds could work. Any ideas? Thanks in advance for your help and suggestions!!!

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  • Will Delphi be there in future ?

    - by devdude
    Yes, there is a version 2009. I know Delphi has a big community since years (10 plus)and I believe you could create native windows exe before Visual Basic got to speed (with all its dll's nighmare). But is it future-proof ? Is there a need or market for a non-crossplatform native all-in-one executable ? Will Embarcardero ex Codegear ex Borland continue to push it ? Why is it so expensive ? Who (non company) can afford it, in order to learn it ?

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  • Optimising local image loading/rendering on iPhone

    - by Tricky
    Hi, I'm looking to create an interface where the user can navigate through large volumes of images. Each image has a thumbnail of 128x128 that I wish to display and will be kind of similar to coverflow in operation. I have this all working in principle but am becoming stuck when navigating through content at speed. The interface begins to stutter and becoming jerky. I believe this is primarily because of disk i/o and the cost of rendering each image. Is there anyway this can be handed over to a seperate thread simply? Defaulting to a greyed out thumbnail until the image has loaded? How have Apple managed to achieve this in coverflow? Many thanks,

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  • CruiseControl / NANT <copy> Task

    - by Striker
    We have a website with all the media (css/images) stored in a media folder. The media folder and it's 95 subdirectories contain about 400 total files. We have a Cruiscontrol project that monitors just the media directory for changes and when triggered copies those files to our integration server. Unfortunately, our integration server is at a remote location and so even when copying 2-3 files the NANT task is taking 4+ minutes. I believe the combination of the sheer number or directories/files and our network latency is causing the NANT task to run slow. I believe it is comparing the modified dates of both the local and remote copy of every file. I really want to speed this up and my initial thought was instead of trying to copy the whole media folder, can I get the list of file modifications from CruiseControl and specifically copy those files instead, saving the NANT task the work of having to compare them all for changes. Is there a way to do what I am asking or is there a better way to accomplish the same performance gains?

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  • Help with parsing lxml

    - by Casey
    Hi To implement a college project, I need to handle XML files. For this I choose lxml after doing some research. However I can't seem to find some nice tutorial to help me get started. I can't choose most specifically which type of parsing I need to use. My XML files don't have that much data but speed is main concern, not memory. Can anyone point me to some tutorial that would help me or some book that I can lookup? I have already tried the tutorial on lxml site but that didn't help me much. Is there some small application I can look up to get a hang of parsing XML with lxml

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  • jquery noConflict not working in IE8 only

    - by slik
    I have a website using the prootype framework and I am looking to use a jquery plugin. Everything works just not in IE8. It works in ie7 which amazes me. Any idea what maybe wrong? jQuery.noConflict(); function OpenUp(sURL){ window.open(sURL,null,'height=560,width=820,status=yes,toolbar=yes,menubar=yes,location=yes,resizable=yes,scrollbars=yes',false); } jQuery(document).ready(function($) { $("head").append("<link>"); css = $("head").children(":last"); css.attr({ rel: "stylesheet", type: "text/css", href: "/my/docs/jquery.simplyscroll.css" }); $("#scroller").simplyScroll({ autoMode: 'loop', framerate: 1, speed: 1 }); }); I also tired the following: var $j = jQuery.noConflict(); var j = jQuery.noConflict(); everythig works just not in IE8 alone.

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  • Problem With HTML5 Application Cache Whitelist - Won't Ignore Items

    - by Ryan Donnelly
    I'm trying to use HTML5 Application Cache to speed some things up on an iPhone webapp. It works great for storing images, css and JS, but the problem is that it also tries to store the HTML. I haven't been able to get it to ignore the html and stop storing it in the cache. From what I've read, I have to "whitelist" the files and directories that I want to load no matter what. I've tried listing the files I want cached explicitly, and I've tried adding a series of things under the "NETWORK:" heading. I've tried * / /* http://mysite.com http://mysite.com/ http://mysite.com/* None of them seem to work. Is there any way to ignore HTML files by MIME-Type or anything? Any advice would be appreciated. Ryan P.S. Of course, my site is not mysite.com..I just used that for simplicity.

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  • FoxPro to C#: What best method between ODBC, OLE DB or another?

    - by Martin Labelle
    We need to read data from FoxPro 8 with C#. I'm gonna do some operations, and will push some of thoses data to an SQL Server database. We are not sure what's best method to read those data. I saw OLE DB and ODBC; what's best? REQUIRMENTS: The export program will run each night, but my company runs 24h a day. The DBF could sometimes be huge. We DON'T need to modify data. Our system, wich use FoxPro, is quite unstable: I need to find a way that ABSOLUTELY do not corrupt data, and, ideally, do not lock DBF files while reading. Speed is a minor requirement: it must be quick, but requirement #4 is most important.

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  • Is there any simple way to test two PNGs for equality?

    - by Mason Wheeler
    I've got a bunch of PNG images, and I'm looking for a way to identify duplicates. By duplicates I mean, specifically, two PNG files whose uncompressed image data are identical, not necessarily whose files are identical. This means I can't do something simple like compare CRC hash values. I figure this can actually be done reliably since PNGs use lossless compression, but I'm worried about speed. I know I can winnow things down a little by testing for equal dimensions first, but when it comes time to actually compare the images against each other, is there any way to do it reasonably efficiently? (ie. faster than the "double-for-loop checking pixel values against each other" brute-force method?)

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  • Generate Info (wrapper) Class from stored procedure

    - by Adem
    Hello everybody I am in a crucial project and I am trying to speed up the development phase by using codesmith for generating the business class DAL and info class for the tables of my project. There are about 50 tables with relationships parent child many to many and for retrieving data I have to code several inner joins in stored procedures. I have to combine fields from many tables and this makes working with the info class difficult. Is there anyway to generate info class from stored procedures or to be more exact is there a way to parse the result set of the stored procedure and to generate the info class with properties for every column in that result set. Please if anyone can give me some advice and tell me how to achieve this. Best Regards

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  • How to convert thousands of PDF files to a single Postscript file in a specified order

    - by tggagne
    I've discovered multiple options for convert a few to serveral PDFs into Postscript, but many are command-line programs with command-line limitations (this application lives on .NET). Our application generates tens-of-thousands of PDFs that we need to send to a printer, except BEFORE the Postscript is printed we need to edit the Postscript to insert print command instructions (duplex, tray-pulls, highlight color, etc.) I think a perfect solution might allow us to write the PDFs to a stream, and simultaneously allow us to read the output stream so we may edit the Postscript before writing it to a file. Of course, if I must create the file first containing all 10,000 PDFs and edit it in an additional pass, I'm OK with that, too. I should mention that speed is important. I need to print 10,000 at a time, but need to keep the printers busy 24-hours/day.

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