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• JFreeChart Legend Display

  - by Richard B

  In my JFreeChart timeseries plots I find the legends lines to thin to see the colour accurately. Another post [ jfreechart - change sample of colors in legend ] suggested overriding a renderer method as follows: renderer = new XYLineAndShapeRenderer() { private static final long serialVersionUID = 1L; public Shape lookupLegendShape(int series) { return new Rectangle(15, 15); } }; this approach works fine until you do what I did renderer.setSeriesShapesVisible(i, false); Once I did that the legend reverts back to a line. Is there any way round this?

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• Common programming mistakes for Scala developers to avoid

  - by jelovirt

  In the spirit of Common programming mistakes for Java developers to avoid? Common programming mistakes for JavaScript developers to avoid? Common programming mistakes for .NET developers to avoid? Common programming mistakes for Haskell developers to avoid? Common programming mistakes for Python developers to avoid? Common Programming Mistakes for Ruby Developers to Avoid Common programming mistakes for PHP developers to avoid? what are some common mistakes made by Scala developers, and how can we avoid them? Also, as the biggest group of new Scala developers come from Java, what specific pitfalls they have to be aware of? For example, one often cited problem Java programmers moving to Scala make is use a procedural approach when a functional one would be more suitable in Scala. What other mistakes e.g. in API design newcomers should try to avoid.

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• Creating a System.Web.UI.Page programatically in IHTTPHandler

  - by ObiWanKenobi

  I am trying to use the ASP.NET (3.5) "Routing Module" functionality to create custom pages based on the contents of the URL. Various articles, such as this one: http://blogs.msdn.com/mikeormond/archive/2008/05/14/using-asp-net-routing-independent-of-mvc.aspx explain how to use ASP.NET Routing to branch to existing pages on the web server. What I would like to do is create the page on-the-fly using code. My first attempt looks like this: public class SimpleRouteHandler : IRouteHandler { public IHttpHandler GetHttpHandler(RequestContext requestContext) { string pageName = requestContext.RouteData.GetRequiredString("PageName"); Page myPage = new Page(); myPage.Response.Write("hello " + pageName); return myPage; } } But this throws an HTTPException saying "Response is not available in this context." at the Response.Write statement. Any ideas on how to proceed? UPDATE: In the end, I went with an approach based on IHttpModule, which turned out to be rather easy.

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• Does <httpRedirect> in web.config work in a mono setup? Or is it IIS7 specific?

  - by Crystal

  We had some content restructure recently and I'd like to put in some redirect rules into web.config so bookmarks to the old pages can get routed to their new locations/pages. I tried using this approach: <location path="~/product/productA.aspx"> <system.webServer> <httpRedirect enabled="true" destination="~/product/category/productA.aspx" exactDestination="false" childOnly="true" httpResponseStatus="Permanent" /> </system.webServer> </location> But all I'm getting when I go to "http://www.oursite.com/product/productA.aspx" is our http 404 page. Am I doing something wrong, or is the httpRedirect tag in web.config not supported in mono? worked, but not ideal for what we want to achieve. Thank you :)

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• Python key word arguments

  - by pythonic metaphor

  I have several layers of function calls, passing around a common dictionary of key word arguments: def func1(**qwargs): func2(**qwargs) func3(**qwargs) I would like to supply some default arguments in some of the subsequent function calls, something like this: def func1(**qwargs): func2(arg = qwargs.get("arg", default), **qwargs) func3(**qwargs) The problem with this approach is that if arg is inside qwargs, a TypeError is raised with "got multiple values for keyword argument". I don't want to set qwargs["arg"] to default, because then func3 gets this argument without warrant. I could make a copy.copy of the qwargs and set "arg" in the copy, but qwargs could have large data structures in it and I don't want to copy them (maybe copy.copy wouldn't, only copy.deepcopy?). What's the pythonic thing to do here?

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• Finding the closest grid coordinate to the mouse position with javascript/jQuery

  - by Acorn

  What I'm trying to do is make a grid of invisible coordinates on the page equally spaced. I then want a <div> to be placed at whatever grid coordinate is closest to the pointer when onclick is triggered. Here's the rough idea: I have the tracking of the mouse coordinates and the placing of the <div> worked out fine. What I'm stuck with is how to approach the problem of the grid of coordinates. First of all, should I have all my coordinates in an array which I then compare my onclick coordinate to? Or seeing as my grid coordinates follow a rule, could I do something like finding out which coordinate that is a multiple of whatever my spacing is is closest to the onclick coordinate? And then, where do I start with working out which grid point coordinate is closest? What's the best way of going about it? Thanks!

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• PHP app with cookie less session does not work

  - by iama

  I am trying to use PHP session without using cookies. I have enabled session.use_trans_sid and disabled session.use_cookies in my php.ini file. I have also disabled cookies in my firefox browser. Now, when I browse my home page, I do not see the HTTP set cookie header in the server response to my page request (using Live HTTP headers). My understanding is that PHP will append session IDs to my request URL when cookies are disabled. Am I doing something wrong? BTW, I am aware using session IDs is not a recommended approach.

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• combinations of sizes for shipping

  - by Eadz

  Hi there, I've got a bunch of products with sizes to ship and I need to find out the cheapest rate. Given a shipment made out of sizes, say [1,3,3,5] I need to decide how to ship - all together or separate. However it's not as simple as [1,3,3,5] or 1 & 3 & 3 & 5, i need all of the possible combinations something like: [ [[1,3,3,5]], ( 1 shipment ) [[1],[3,3,5]], ( 2 shipments ) [[1,3],[3,5]], ( 2 shipments ) [[1,3,3],[5]], ( 2 shipments ) [[1,5],[3,3]], ( 2 shipments ) [[1,3],[3],[5]], ( 3 shipments ) [[1],[3],[3],[5]] ( 4 shipments ) ] ( etc - many more i assume ) I've tried combinations from the facets gem but it's not quite what i'm after, and I'm not sure how else to approach this problem. I understand it probably has a name and a solution if only I knew the name :) I understand there could be a lot of combinations, but the initial array of sizes won't be larger than 7 or so. Thanks in advance!

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• Selecting a UserControl from XAML

  - by kmontgom

  I'm working on a problem right now where I need to embed a UserControl inside another UserControl. But, I need to determine at runtime which embedded UserControl to instantiate. This implies to me that some form of data binding and/or template selection mechanism has to be invoked, but I'm not sure how to proceed with the pure XAML approach. If I was to do this with code, I would define some sort of container control in the parent UserControl, and then in the code-behind, implement some logic which would instantiate the appropriate child UserControl and then insert it as Content into the specified container in the parent UserControl. Can this be done using only XAML, or is some sort of code-behind required?

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• Is there a faster alternative to using textures in XNA?

  - by Matthew Bowen

  I am writing a map editing program for a 2D game using XNA. To create a Texture2D for all of the tiles that a map requires takes too long. Are there any alternatives to using textures for drawing with XNA? I attempted to create just one texture per tile set instead of a texture for every tile in a tile set, but there is a limit to the size of textures and I could not fit all the tiles of a tile set into one texture. Currently the program contains all the would-be textures in memory as Bitmap objects. Is there a way to simply draw a Bitmap object to the screen in XNA? I have searched but I cannot find any information on this. This approach would avoid having to create textures altogether, however any tinting or effects I would have to do to the bitmap directly. Any help would be very much appreciated. Thanks

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• Use trackball for scrolling in Android ListView

  - by gartenkralleb

  hi, i have a ListView, whose content should not be selectable. i set the ListView to choiceMode="none" and set a transparent listSelector. for touch mode it acts as desired. a problem is the use of the trackball. if i try to use it for scrolling, the scroll starts after the 10th push to "down". this is caused by the invisible listSelector, which scrolls down the list until the 10th list item is "invisibily" selected. i try to override dispatchTrackballEvent and do the scrolling with scrollBy, but i did not finished this approach yet, to have a look on alternative suggestions. is there a simple solution for my problem?

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• SetSel on EN_SETFOCUS or WM_SETFOCUS doesn't work

  - by Coder

  I've ran into next mystic thing in Winapi/MFC, I have an edit box, contents of which I have to select on Tab, Lclick, Rclick, Mclick and so on. The sort of obvious path is to handle the SETFOCUS message and call SetSel(0, -1), which should select all text. But it doesn't work! What's wrong? I tried googling, everyone seems to override Lclilks or handle SetSel in parent windows, but this is wrong from encapsulation point of view, also multiple clicks (user wants to insert something in the middle of the text) will break, and so on. Why isn't my approach working, I tried like 10 different ways, tried to trap all possible focus messages, looked up info on MSDN, but nothing works as expected. Also, I need to recreate the carret on focus, which also doesn't seem to work. SETFOCUS message gets trapped alright. If I add __asm int 3, it breaks every time. It's the create carret and setsel that gets swallowed it seems.

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• Java resource as file

  - by Martin Riedel

  Is there a way in Java to construct a File instance on a resource retrieved from a jar through the classloader? My application uses some files from the jar (default) or from a filesystem directory specified at runtime (user input). I'm looking for a consistent way of a) loading these files as a stream b) listing the files in the user-defined directory or the directory in the jar respectively Edit: Apparently, the ideal approach would be to stay away from java.io.File altogether. Is there a way to load a directory from the classpath and list its contents (files/entities contained in it)?

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• git: how to squash the first two commits?

  - by kch

  With git rebase --interactive <commit> you can squash any number of commits together into a single one. It's an OCD heaven. And that's all great unless you want to squash commits into the initial commit. That seems impossible to do. Any way to achieve it? Moderately related: In a related question, I managed to come up with a different approach to the need of squashing against the first commit, which is, well, to make it the second one. If you're interested: git: how to insert a commit as the first, shifting all the others?

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• How to use TDD in a not very "Testy" environment

  - by dbemerlin

  I work in a company where OOP is... well, not fobidden, but at least frowned upon as "too complex". My coworkers write lots of 100+ lines functions and they are usually all in a "funcs.inc.php" or "something.inc.php", if they use any functions at all, often they don't since copy-paste is faster. I would love to start using TDD at least for the code i write but as i have to interface with their code i can't see how to begin. It's not legacy code as they are actively developing it and i don't want to modify their code as i don't want to provoke conflicts. Which approach would you suggest, except for changing the company?

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• Detecting syllables in a word

  - by user50705

  I need to find a fairly efficient way to detect syllables in a word. E.g., invisible - in-vi-sib-le There are some syllabification rules that could be used: V CV VC CVC CCV CCCV CVCC *where V is a vowel and C is a consonant. e.g., pronunciation (5 Pro-nun-ci-a-tion; CV-CVC-CV-V-CVC) I've tried few methods, among which were using regex (which helps only if you want to count syllables) or hard coded rule definition (a brute force approach which proves to be very inefficient) and finally using a finite state automata (which did not result with anything useful). The purpose of my application is to create a dictionary of all syllables in a given language. This dictionary will later be used for spell checking applications (using Bayesian classifiers) and text to speech synthesis. I would appreciate if one could give me tips on an alternate way to solve this problem besides my previous approaches. I work in Java, but any tip in C/C++, C#, Python, Perl... would work for me.

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• Not-quite-JSON string deserialization in Python

  - by cpharmston

  I get the following text as a string from an XML-based REST API 'd':4 'ca':5 'sen':1 'diann':2,6,8 'feinstein':3,7,9 that I'm looking to deserialize into a pretty little Python dictionary: { 'd': [4], 'ca': [5], 'sen': [1], 'diann': [2, 6, 8], 'feinstein': [3, 7, 9] } I'm hoping to avoid using regular expressions or heavy string manipulation, as this format isn't documented and may change. The best I've been able to come up with: members = {} for m in elem.text.split(' '): m = m.split(':') members[m[0].replace("'", '')] = map(int, m[1].split(',')) return members Obviously a terrible approach, but it works, and that's better than anything else I've got right now. Any suggestions on better approaches?

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• is it possible to mix DHTML and Applet for Drag and drop?

  - by indra

  I am working on some example to find if a Div (DHTML) on to Java Applet in a web page. I used YUI JS Drag drop library to make the div as droppable item and made the div surrounding the Applet as Drop Target. When I dropped it in the Div containing Applet, I am Calling some method in the applet from Javascript Drop handler? This is fine, but I have the problem if the applet contains different objects and regions , how to identify which object it is dropped on? is there any other approach to work with DHTML and applets for Drag and Drop? Also, is it possible to write DD between two applets? Thanks in advance.

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• Use API or SQL to detect new Support Tickets?

  - by David Powers

  I currently work for a company that uses Kayako for their support system. They sell an extra program called Insta Alert that plays a sound when a new ticket is submitted. I use WHMCS for my own company, and would like to develop something to work with it that does the same thing. Here is the WHMCS API... http://wiki.whmcs.com/API:Functions I am wondering if it would make more sense from a remote C++ application to use the API or just check the MySQL database for new tickets? This is not really something im overly familiar with (I usually make mods) but it doesn't seem overly difficult. I just want some assistance in choosing the best approach.

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• Thread safe lockfree mutual ByteArray queue

  - by user313421

  A byte stream should be transferred and there is one producer thread and a consumer one. Speed of producer is higher than consumer most of the time, and I need enough buffered data for QoS of my application. I read about my problem and there are solutions like shared buffer, PipeStream .NET class ... This class is going to be instantiated many times on server so I need and optimized solution. Is it good idea to use a Queue of ByteArray ? If yes, I'll use an optimization algorithm to guess the Queue size and each ByteArray capacity and theoretically it fits my case. If no, I what's the best approach ? Please let me know if there's a good lock free thread safe implementation of ByteArray Queue in C# or VB. Thanks in advance

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• using macro defined in header files

  - by Neeraj

  I have a macro definition in header file like this: // header.h ARRAY_SZ(a) = ((int) sizeof(a)/sizeof(a[0])); This is defined in some header file, which includes some more header files. Now, i need to use this macro in some source file that has no other reason to include header.h or any other header files included in header.h, so should i redefine the macro in my source file or simply include the header file header.h. Will the latter approach affect the code size/compile time (I think yes), or runtime (i think no)? Your advice on this!

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• Windows disassembler: looking for a tool...

  - by SigTerm

  Hello. I'm looking for a (preferably free) tool that can produce "proper" disassembly listing from a (non-.NET) windows PE file (*.exe or *.dll). Important requirement: it should be possible to run the listing through a windows assembler (nasm, masm or whatever) and get working exe again (not necessarily identical to original one, but it should behave in the same way). Intended usage is adding new subroutines into existing code, when source is not available. Ideally, tool should be able to detect function/segment boundaries, API calls, and generate proper labels for jumps (I can live without labels for loops/jumps, though, but function boundary detection would be nice), and keep program resources/segments in place. I'm already aware of IdaPRO(not free), OllyDBG (useful for in-place hacking, doesn't generate disassembly listing, AFAIK), ndisasm (output isn't suitable for assembler), dumpbin (useful, but AFAIK, output isn't suitable for assembler) and "proxy dll" technique. Ideas? Or maybe there is a book/tutorial that explains some kind of alternative approach?

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• UITextField with the lookup

  - by leon

  Hello, I would like to achive the same functinoanlity in the UUTextField control as Google search web site (which uses Ajax for this): as user start typing, list of suggestion searches is shown. Then more letteres you type, suggestion list changes. So imaging I have array of words: Apple Abc Aman As user types A, all thress suggesions are shown, if user type one more letter p, then Apple is suggested. How would I do something like this? Mail type of applicatins do it, when receipent name is typed in the To: edit control I guess I can use UITableView with the search, is it correct approach?

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• Can Entity Framework be used for the purpose of entity/schema definition at application runtime?

  - by Kabeer

  Hello. Can 'Entity Framework' be used for the purpose of entity definition at application runtime? Ok, to make it simple, here is what I want to achieve: My application is a product. I should be able to define entities at runtime on the basis of inputs gathered from an 'authoring' user (in effect this means 'model first' approach). These entities are of course persistable. Further, after having defined the entities and their relationships, I should be able to make complex queries across them for many reasons, including reports. Is the above possible and how? So far what I have realized is that there is a dependency on Visual Studio.

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• can I see all SQL statements sent over an ODBC connection?

  - by Dave Cameron

  I'm working with a third-party application that uses ODBC to connect to, and alter, a database. During certain failure modes, the end-results are not what I expect. To understand it better, I'd like some way of inspecting all the statements sent to the database. Is there a way to do this with ODBC? I know with JDBC I could use http://www.p6spy.com/ to see all statements sent, for example when debugging hibernate. p6spy is a "proxy" driver that records commands sent and forwards them on to the real JDBC driver. Another possibility might be a protocol sniffer that would capture statements over the wire. Although, I'm unsure if ODBC includes a standard wire protocol, or only specifieds the API. Does anyone know of existing tools that would allow me to do either of these things? Alternatively, is there another approach I could take?

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