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  • Python: Embed Chaco in PyQt4 Mystery

    - by random guy
    How do i go about adding Chaco to an existing PyQt4 application? Hours of searches yielded little (search for yourself). So far i've figured i need the following lines: import os os.environ['ETS_TOOLKIT']='qt4' i could not find PyQt4-Chaco code anywhere on the internets i would be very grateful to anyone filling in the blanks to show me the simplest line plot possible (with 2 points) from PyQt4 import QtCore, QtGui import sys import os os.environ['ETS_TOOLKIT']='qt4' from enthought <blanks> : : app = QtGui.QApplication(sys.argv) main_window = QtGui.QMainWindow() main_window.setCentralWidget(<blanks>) main_window.show() app.exec_() print('bye') what Chaco/Enthought class inherits from QWidget ?

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  • How do I parse an XML file that's on a different web server?

    - by Tim
    I have a list of training dates saved into an XML file, and I have a little javascript file that parses all of the training dates and spits them out into a neatly formatted page. This solution was fine until we decided that we wanted another web-page on another sever to access the same XML file. Since I cannot use JavaScript to parse an XML file that's located on another server, I figured I'd just use an ASP script. However, when I run this following, I get a response that there are 0 nodes matching a value which should have several: <% Dim URL, objXML URL = "http://www.site.com/feed.xml" Set objXML = Server.CreateObject("MSXML2.DOMDocument.3.0") objXML.setProperty "ServerHTTPRequest", True objXML.async = False objXML.Load(URL) If objXML.parseError.errorCode <> 0 Then Response.Write(objXML.parseError.reason) Response.Write(objXML.parseError.errorCode) End If Response.Write(objXML.getElementsByTagName("era").length) %> My question is two-fold: Is there are a way I can use java-script to parse a remote XML file If not, why doesn't my code give me the proper response?

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  • How new is @font-face, and what do I need to know before I add it to a website?

    - by DavidR
    I started getting into reading design blogs a little while ago, and it seemed that @font-face got really popular sometime late last year, or something like that, because I was under the impression that it was a new emerging feature of the web. But then I saw that Internet Explorer has had it since IE4 (with some conversion). So is it common to see @font-face online nowadays? Sould I have anything in mind with respect to accessibility, legality, or rendering before I do something like this? I saw that Hulu.com renders fonts with Canvas and a javascript called "cufon."

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  • How do you get "in the zone"?

    - by Wayne Werner
    Hi, I've just started my first real programming job and am pleased to discover that this is exactly what I want to do for the rest of my life. When it comes round to ~1 hour before it's time to go home and I think "Man, do I have to go home already?" I'd say that's A Good Thing(tm). One thing I've discovered though is that it takes a little while for my brain to get "in gear" or "in the Zone", so I'm curious what other folks do to get programming at their prime. My current flow is when I get here I visit SO and look at the interesting problems - I find it helps get my brain moving. After 20-30 minutes I start looking at my code/specs/etc to decide what I want/need to work on first. So how do you get started?

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  • List of fundamental data structures - what am I missing?

    - by jboxer
    I've been studying my fundamental data structures a bunch recently, trying to make sure I've got them down cold. By "fundamental", I mean the real basic ones. Fancy ones like Red-Black Trees and Bloom Filters are clearly worth knowing, but they're usually either enhancements of fundamental ones (Red-Black Trees are binary search trees with special properties to keep them balanced) or they're only useful in very specific situations (Bloom Filters). So far, I'm "fluent" in the following data structures: Arrays Linked Lists Stacks/Queues Binary Search Trees Heaps/Priority Queues Hash Tables However, I feel like I'm missing something. Are there any fundamental ones that I'm forgetting about? EDIT: Added these after posting the question Strings (suggested by catchmeifyoutry) Sets (suggested by Peter) Graphs (suggested by Nick D and aJ) B-Trees (Suggested by tloach) I'm a little on-the-fence about whether these are too fancy or not, but I think they're different enough from the fundamental structures (and important enough) to be worth studying as fundamental.

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  • How to convert the output of an artificial neural network into probabilities?

    - by Mathieu Pagé
    I've read about neural network a little while ago and I understand how an ANN (especially a multilayer perceptron that learns via backpropagation) can learn to classify an event as true or false. I think there are two ways : 1) You get one output neuron. It it's value is 0.5 the events is likely true, if it's value is <=0.5 the event is likely to be false. 2) You get two output neurons, if the value of the first is than the value of the second the event is likely true and vice versa. In these case, the ANN tells you if an event is likely true or likely false. It does not tell how likely it is. Is there a way to convert this value to some odds or to directly get odds out of the ANN. I'd like to get an output like "The event has a 84% probability to be true"

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  • View artifacts leaking into the model of MVC

    - by Jono
    In an ASP.NET MVC application (which has very little chance of having its view technology ported to something non-HTML, but whose functional requirements evolve weekly,) how much HTML should ideally be allowed to be directly represented in the Model? I might come across as a design bigot for this, but I regard it as bad practice to allow any view constructs to "leak" into the model in an MVC application (and vice versa). For example, a Model that represents an item you're about to purchase should know nothing about the HTML check box that says "add giftwrap/message", nor should it know about any HTML drop down lists for payment card types. Conversely the View shouldn't be doing work like figuring out button text by translating keys into values (by looking in resource files.)

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  • Would you use Code Bubbles?

    - by Paulo Santos
    I've read this question mentioning Code Bubbles and I've watched their video presentation. The video is impressive, and does seem a little bit futuristic, but apparently it's somewhat real. But that kept me thinking... Would a developer really use such tool? We, as developers, are used to deal with code files, organizing them in directories, in one way or another, some common IDE (for those language that has them). It would be a great leap to use something like Code Bubbles, as they propose. I, personally, am not sure if I could work in such environment... although I think I would just need some adjusting... but I really don't see my mind working out the kinks of it. What are your thoughts on this?

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  • Slider with keypress control bugs when keys pressed to quickly.

    - by Jaybuz
    Hello, I've made a slider that uses the left and right arrow keys to move the slide but when pressed to quickly it will bug a little and I was wondering if it's possible to limit the amount of presses in say a second. You can see it here: {link} $('#slider-nav div').click(function() { $('#slider-nav div').removeClass('selected').addClass(''); $('#slider-nav div:eq('+($.jcarousel.intval($(this).text())-1)+')').addClass('selected'); }) // Allow left and right keys to control slider $(document.documentElement).keypress(function(e) { var code = (e.keyCode ? e.keyCode : e.which); var direction = null; // handle cursor keys if (code == 37) { // left key direction = 'prev'; } else if (code == 39) { // right key direction = 'next'; } if (direction != null) { $('#slider-nav div.selected')[direction]().click(); } });

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  • Tips for a successful AppStore submission?

    - by Andrew Grant
    In a day or two I'll be ready to submit my iPhone app to the AppStore and I'm curious whether people who have gone through this process have any tips / suggestions for a smooth submission process. Here's things I've covered; No memory leaks Tested performance on an actual device Doesn't crash :) Using correct certificates / profile What I'm a little unsure about are how to configure the "Bundle Display Name" /"Bundle Identifier" and "Bundle Name" in info.plist. I understand the first is the text that's shown on the iPhone itself, but what about the last? Does this have to match Bundle Identifier? Are there any other things I should add to the info.plist? I've noticed that when built for Adhoc distribution my app does not have any author/title information in iTunes.

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  • Is it possible to use re2 from Python?

    - by flow
    i just discovered http://code.google.com/p/re2, a promising library that uses a long-neglected way (Thompson NFA) to implement a regular expression engine that can be orders of magnitudes faster than the available engines of awk, Perl, or Python. so i downloaded the code and did the usual sudo make install thing. however, that action had seemingly done little more than adding /usr/local/include/re2/re2.h to my system. there seemed to be some `*.a file in addition, but then what is it with this *.a extension? i would like to use re2 from Python (preferrably Python 3.1) and was excited to see files like make_unicode_groups.py in the distro (maybe just used during the build process?). those however were not deployed on my machine. how can i use re2 from Python?

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  • What's the best way to apply a drop shadow?

    - by jckeyes
    What is the best method for applying drop shadows? I'm working on a site right now where we have a good deal of them, however, I've been fighting to find the best method to do it. The site is pretty animation heavy so shadows need to work well with this. I tried a jQuery shadow pulgin. The shadows looked good and were easy to use but were slow and didn't work well with any animations (required lots of redrawing, very joggy). I also tried creating my own jQuery extension that wraps my element in a couple gray divs and then offsets them a little bit to give a shadow effect. This worked well. It's quick and responsive to the animation. However, it makes DOM manipulation/traversal cumbersome since everything is wrapped in these shadow divs. I know there has to be a better way but this isn't exactly my forte. Thoughts?

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  • a quick overview on access

    - by masfenix
    Hey I am a university student (math major), but programming since I was little (read: 14). I am starting a new programming job tomorrow at a very big company. However I just found out that I might be just working with access for a couple of weeks (macros and whatnot). Can someone just give me a general rundown on how to create and use VB in access. What I mean is how do tables refer to themselves (as objects? as what name?) how to run queries through vb and such. thanks all.

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  • Multiple classes in body tag, multi-dimensional css structure or blueprint for insanity?

    - by mwiik
    This question is about an approach to css structuring, and so is more discussion oriented. I'm working with some outsourced css where the body tags have multiple classes assigned, up to half a dozen. (To make things a little worse, none of the css selectors include an html tag which is making it confusing to analyze the css.) These body classes are then used to modify classed or id'd widgets within. It seems like this approach is like adding an additional dimension to the css, perhaps in some attempt to create a structured css approach. Documentation might have helped, had we been provided any. This differs from my approach where widgets are styled primarily via id'd divs, perhaps extracting the more generic elements into a class, i.e. div#MyWidget.widgets. Any ideas on whether such an approach is maintainable, especially considering I am dealing with websites with thousands of pages including tons of legacy stuff, all done by different people with different skill levels? Thanks...

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  • VB to C# conversion incongruency with lambdas

    - by Jason
    I have a bit of code that I have been tasked with converting to C# from VB. A snippet of mine seems like it cannot be converted from one to the other, and if so, I just don't know how to do it and am getting a little frustrated. Here's some background: OrderForm is an abstract class, inherited by Invoice (and also PurchaseOrder). The following VB snippet works correctly: Dim Invs As List(Of OrderForm) = GetForms(theOrder.OrderID) .... Dim inv As Invoice = Invs.Find( Function(someInv As Invoice) thePO.SubPONumber = someInv.SubInvoiceNumber) In C#, the best I came to converting this is: List<OrderForm> Invs = GetForms(theOrder.OrderID); .... Invoice inv = Invs.Find( (Invoice someInv) => thePO.SubPONumber == someInv.SubInvoiceNumber); However, I get the following error when I do this: Cannot convert lambda expression to delegate type 'System.Predicate' because the parameter types do not match the delegate parameter types Is there any way to fix this without restructuring my whole codebase?

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  • Is there a web site where I can paste a SQL Insert statement and have it break it out by column?

    - by Scott Whitlock
    I've been working on an application that has no discernable data access layer, so all the SQL statements are just built up as strings and executed. I'm constantly confronted by very long INSERT statements where I'm trying to figure out what value in the VALUES list matches up with what column in the column name list. I was about to create a little helper application where I could paste in an INSERT statement and have it show me a list of values matched up with the column names, just for debugging, and I thought, "someone else has probably done this already." Does anyone know of a web site where I can just paste in an INSERT statement and have it show me a two column table with column names in the first column and values in the second column?

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  • New to C/C++ Using Android NDK to port Legacy code, getting compile errors

    - by Donal Rafferty
    I have been trying to take some old Symbian C++ code over to Android today using the NDK. I have little to no C or C++ knowledge so its been a chore, however has to be done. My main issue is that I'm having trouble porting what I believe is Symbian specifi code to work using the small C/C++ subset that is available with the Android NDK. Here is a picture of the compilation errors I'm getting using cygwin I was wondering if anyone could point me in the right direction on how to deal with these errors? For instance is TBool/Int/TUint/RPointerArray/RSocket a Symbian primitive and thats why it wont compile or is it something else? Also what is ISO C++? Any tutorials, guides or tips and help would be greatly appreciated.

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  • Possible to get the line number of the currently executing sproc in SQL Server?

    - by Ian Kemp
    A few years back I worked in a Sybase/Delphi environment, using the BDE to connect to the DB server. We had a little Delphi app that, given the name of a currently executing stored procedure, could tell you what line of that sproc was currently being executed. This was exceptionally useful for debugging sprocs that seemed to be hanging. I'd like to use this functionality in SQL Server, but I can't remember whether it was a Sybase or a BDE feature. Is this functionality available in SQL Server and if so, what command(s) do I need to use to view this information?

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  • How can I get a fixed-position menu like slashdot's comment filtration menu

    - by pkaeding
    Slashdot has a little widget that allows you to tweak your comment threshold to filter out down-modded comments. It will be in one place if you scroll to the top of the page, and as you scroll down, at some point, where its original home is about to scroll off the page, it will switch to fixed position, and stay on your screen. (To see an example, click here.) My question is, how can I accomplish the same effect of having a menu be in one place when scrolled up, and switch to fixed position as the user scrolls down? I know this will involve a combination of CSS and javascript. I'm not necessarily looking for a full example of working code, but what steps will my code need to go through?

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  • Randomly generate sound from onClick and onShake events?

    - by Aaron
    I've literally looked everywhere on the net and found very little clarification on how to do this. Pretty much, I have 8 sound files laid out in an array.xml file and I need to play a randomly chosen file ONCE per or onClick or onShake. First off, what technique should I use to achieve this? ARRAY-RANDOM- STRING-PLAY? RANDOM INT-PLAY? RANDOM INT-STRING-PLAY? Any kind of direction will help greatly cause I'm almost 3 weeks worth of research into this. *NOTE: MediaPlayer mp = MediaPlayer.create(JelloMan.this, R.raw.sound) ...is what I'm stuck on being you can't replace the "R.raw" part with a string...

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  • Does the `Expires` HTTP header needs to be consistent across multiple cold-cache requests?

    - by chakrit
    I'm implementing a custom web server of a kind. And am looking into adding an Expires header support. However, I'm a little unsure of how exactly to implement it. If multiple cold-cache requests are being made to the same unchanged resource on the server and the server returned different Expires header (say it uses relative time to calculate the exact value of the Expires date e.g. +6 hours from the request time), does that invalidate the cache on all the proxy servers in-between as well? Or is it impossible to happen (per the spec)? Does the Expires HTTP header needs to be consistent across multiple cold-cache requests?

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  • Python Desktop Application with the Browser as an interface?

    - by Eli
    I want to create an application that runs on the users computer, a stand-alone application, with installation and what-not, but I want the interface to be a browser, either internal and displayed as an OS window or external accessible using the browser (i.e. some http server). The reason would be because I know a little about Python, but I think I can manage as long as I have some basic roots that I can use and manipulate, and those would be HTML, CSS, and Javascript. I've yet to find a good GUI tool which I can use, and always abandon the idea after trying to mess around and eventually not getting anything.

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  • Getting specific values with regex [JAVA, ANDROID]

    - by David
    I need to knowingly isolate each row of the vcard and get its value. For instance, I want to get "5555" from X-CUSTOMFIELD. So far, my thoughts are: "X-CUSTOMFIELD;\d+" I have been looking at some tutorials and I am a little confused with what function to use? What would my regex above return? Would it give me the whole line or just the numerical part (5555)? I was thinking I i get the whole row, I can use substring to get the digits? BEGIN:VCARD VERSION:2.1 N:Last;First; FN:First Last TEL;HOME;VOICE:111111 TEL;MOBILE;VOICE:222222 X-CUSTOMFIELD;5555 END:VCARD

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  • Top tips for designing GUIs?

    - by oxbow_lakes
    A while back I read (before I lost it) a great book called GUI Bloopers which was full of examples of bad GUI design but also full of useful tidbits like Don't call something a Dialog one minute and a Popup the next. What top tips would you give for designing/documenting a GUI? It would be particularly useful to hear about widgets you designed to cram readable information into as little screen real-estate as possible. I'm going to roll this off with one of my own: avoid trees (e.g. Swing's JTree) unless you really can't avoid it, or have a unbounded hierarchy of stuff. I have found that users don't find them intuitive and they are hard to navigate and filter. PS. I think this question differs from this one as I'm asking for generalist tips

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  • Replacing Text Nodes With DOM Nodes

    - by Greg
    Hey, say I have a text node via XPath. How would I replace the text node with a new DOM node? For example, this little patch of code will go through text nodes, and if text matches something, it will replace it with a corresponding image via img element. I wanted something faster then a global page regex or even a element innerHTML regex. Any help would be appreciated. EDIT: Never mind. I figured it out.

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