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• Open source jigsaw piece generator

  - by codecowboy

  Hi, Does anyone know of a C-based open source class / framework which can generate a random jigsaw puzzle from an image or generate a random puzzle template which could then be applied to an image? The puzzle pieces must have male and female notches/holes. There should be more than one template so that the puzzle does not become too easy. The target system is iOS / Mac. If not, how would you approach this problem? The puzzle pieces should be as close to a real jigsaw piece shape as possible and the system must be dynamic so that the user can use their own photos or download photos. thanks!

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• Getting object coordinates from camera

  - by user566757

  I've implemented a camera in Java using a position vector and three direction vectors so I can use gluLookAt(); moving around in `ghost mode' works fine enough, but I want to add collision detection. I can't seem to figure out how to transform my position vector to coordinates in which OpenGL draws my objects. A rough sketch of my drawing loop is this: glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); camera.setView(); drawer.drawTheScene(); I'm at a loss of how to proceed; looking at the ModelView matrix between calls and my position vector, I haven't found any kind of correlation.

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• Implementing a live voting system

  - by Will Eddins

  I'm looking at implementing a live voting system on my website. The website provides a live stream, and I'd like to be able to prompt viewers to select an answer during a vote initiated by the caster. I can understand how to store the data in a mySQL database, and how to process the answers. However: How would I initially start the vote on the client-side and display it? Should a script be running every few seconds on the page, checking another page to see if a question is available for the user? Are there any existing examples of a real-time polling system such as what I'm looking at implementing?

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• BeautifulSoup Parser Confusion - HTML

  - by lyngbym

  I'm trying to scrape some content off another site and I'm not sure why BeautifulSoup is producing this output. It is only finding a blank space inside the match, but the real HTML contains a large amount of markup. I apologize if this is something stupid on my part. I'm new to python. Here's my code: import sys import os import mechanize import re from BeautifulSoup import BeautifulSoup def scrape_trails(BASE_URL, data): #Get the trail names soup = BeautifulSoup(data) sitesDiv = soup.findAll("div", attrs={"id" : "sitesDiv"}) print sitesDiv def main(): BASE_URL = "http://www.dnr.state.mn.us/skiing/skipass/list.html" br = mechanize.Browser() data = br.open(BASE_URL).get_data() links = scrape_trails(BASE_URL, data) if __name__ == '__main__': main() If you follow that URL you can see the sitesDiv contains a lot of markup. I'm not sure if I'm doing something wrong or if this is just malformed markup that the script can't handle. Thanks!

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• Preferred menus for C# application.

  - by SeaDrive

  Which of the menu tools do you use for C# windows applications? I began with MainMenu, but when I moved to VS2005, only MenuStrip appeared in the Toolbox, so I assumed it was new and better. However, the merge/replace action seems to require a lot more time and effort, and leave one open to maintenance problems. (Perhaps my real question is "what were they thinking when they created MenuStrip?) Do you drag/drop the menus, or do you write the code? Do you use MainMenu, MenuStrip, or some other alternatives?

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• Why is TargetInvocationException treated as uncaught by the IDE?

  - by Jason Coyne

  I have some code that is using reflection to pull property values from an object. In some cases the properties may throw exceptions, because they have null references etc. try { child.Target = propertyInfo.GetValue(target, null); } catch (TargetInvocationException ex) { child.Target = ex.InnerException.Message; } catch (Exception ex) { child.Target = ex.Message; } Ultimately the code works correctly, however when I am running under the debugger : When the property throws an exception, the IDE drops into the debugger as if the exception was uncaught. If I just hit run, the program flows through and the exception comes out as a TargetInvocationException with the real exception in the InnerException property. How can I stop this from happening?

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• ExtJS combobox acting like regular select

  - by bensiu

  Hi, I try to use ComboBox on FormPanel, it is defined like this: xtype: 'combo', name: 'Reasons', store: new Ext.data.ArrayStore({ id: 0, fields: [ 'myId', 'displayText' ], data: [ [ 1, 'Reason 1' ], [ 2, 'Second Reason' ], [ 3, 'Something else' ] ] }), typeAhead: false, mode: 'local', valueField: 'myId', displayField: 'displayText', allowBlank: false, editable: false, forceSelection: true I would like to act like a ordinary select element, when I have editable as false I not able to re-select anymore, when as true ( default ) I need to remove selection ( by backspace or delete ) in order to re-select. What else I should turn off in order to downgrade combobox to select or shpuld I consider to use other component instead ?

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• Ruby on Rails: one-to-one mapping. Just semantics or really a different structure.

  - by Sam

  So I'm creating a plugin for Ruby on Rails to make implemented addresses including country, state, city, and zip_code for countries that can follow that paradigm a lot easier but that's beside the point expect for how the address model is associated. So starting with my address model. class Address < ActiveRecord::Base has_one :country has_one :state has_one :city has_one :zip_code end What's the difference between saying belongs_to and has_one Seems to be the same thing because both only require one model to declare ownership and foreign_key And it also seems that both are logical to say. an address belongs to an account and an account has one address Is this only semantics or is there are real difference

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• How to merge branches in Git by "hunk"

  - by user1316464

  Here's the scenario. I made a "dev" branch off the "master" branch and made a few new commits. Some of those changes are going to only be relevant to my local development machine. For example I changed a URL variable to point to a local apache server instead of the real URL that's posted online (I did this for speed during the testing phase). Now I'd like to incorporate my changes from the dev branch into the master branch but NOT those changes which only make sense in my local environment. I'd envisioned something like a merge --patch which would allow me to choose the changes I want to merge line by line. Alternatively maybe I could checkout the "master" branch, but keep the files in my working directory as they were in the "dev" branch, then do a git add --patch. Would that work?

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• How to debug this?

  - by LeonixSolutions

  I have an application which takes measurements every second (I am running it in demo mode & generating random data, so the problem is not to do with reading from devices attached to the serial port). After 5 or 6 minutes it hangs. I have added try // entire body of procedure/function goes here except on E: Exception do begin MessageDlg('Internal coding error in <function name>()', mtError, [mbOK], 0); end; end; to every single function (and Application.Run() in the project file), but I don't see any message dialogs. Any idea how I can test this?

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• iphone app photo upload to server from app threads

  - by user290380

  I have an app that needs to upload a least 5 photos to a server using API call available with the server. For that I am planning to use threads which will take care of photo upload and the main process can go on with the navigation of views etc. What I cant decide is whether it is OK to spawn five separate threads in iphone or use a single thread that will do the upload. In the later cases obviously it will become quite slow. Basically an HTTP POST request will be made to the server with the NSMutableURLRequest object using NSCOnnection. More threads mean more complexity and sync issues, but I can try to write code as neat as possible if it means better performance than a single thread which is simple but is a real stopper if performance is considered. Anybody with any experience in this kinda app. ??

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• how to combine changes tracked from several documents

  - by Jessica

  I tried to search the solution in internet, but found nothing, is there anyone who can help me? For my application, there is one document (Microsoft word), and this document is reviewed by several people in the "Track changes" mode, so the input to my application is the original document and the reviewed documents with changes (like insert/delete/comments). By this link , I know how to extract all the changes from the reviewed documents. what i want is to combine all the changes from all the reviewed documents into ONE document, and make all the changes "accepted", so the output of my application is one modified Microsoft document with all the changes (delete/insert/comment) accepted. My problem is that I don't know how to combine the changes from several documents into one single document. Anyone has an idea how to do this? Thank you very much in advance.

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• Parsing String to TreeNode

  - by Krusu70

  Anyone have a good algorithm how to parse a String to TreeNode in Java? Let's say we have a string s which says how to build a TreeNode. A(B,C) means that A is the name (String) of TreeNode, B is child of A (Treenode), C is sibling of A (TreeNode). So if I call function with string A(B(D,E(F,G)),C) (just a example), then I get a TreeNode equals to: level A (String: name), B - Child (TreeNode), C - Sibling (TreeNode) level B (String: name), D - Child of B (TreeNode), E - Sibling of B (TreeNode) level E (String: name), F - Child of E (TreeNode), G - Sibling of E (TreeNode) The name may not be 1 letter, it could be like real name (many letters).

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• AUTOMATING EXCEL MACRO USING PYTHON

  - by user324056

  Hi all, Here is my question... I am using python in Linux to automate an excel. I have finished writing data into excel by using pyexcelerator package. Now comes the real challenge. I have to add another tab to the existing sheet and that tab should contain the macro run in the first tab. All these things should be automated. I googled a lot and found win32come to do a job in macro, but that was only for windows. Anyone have any idea of how to do this, or can you guide me with few suggestions. Thanks in advance.

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• nUnit Assert.That(method,Throws.Exception) not catching exceptions

  - by JasonM

  Hi Everyone, Can someone tell me why this unit test that checks for exceptions fails? Obviously my real test is checking other code but I'm using Int32.Parse to show the issue. [Test] public void MyTest() { Assert.That(Int32.Parse("abc"), Throws.Exception.TypeOf<FormatException>()); } The test fails, giving this error. Obviously I'm trying to test for this exception and I think I'm missing something in my syntax. Error 1 TestCase '.MyTest' failed: System.FormatException : Input string was not in a correct format. at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) at System.Int32.Parse(String s) based on the documentation at Throws Constraint (NUnit 2.5)

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• interface builder breaks on dual display

  - by madmik3

  Hi, I frequently connect and disconnect my laptop from a secondary display. Additionally I work in a small group that uses svn to manage xib files. It seems that if you drag a UIView display into a secondary display in interface builder and save the xib then either disconnect that display or open it on a computer with a secondary display in a different postion (left v right of the screen for example) then the view can't be seen/closed/moved. I've found no work around other than attaching a secondary display in the same position. This can be a real pain. Has anyone found a solution to this? thanks.

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• Creating TCP network errors for unit testing

  - by Robert S. Barnes

  I'd like to create various network errors during testing. I'm using the Berkely sockets API directly in C++ on Linux. I'm running a mock server in another thread from within Boost.Test which listens on localhost. For instance, I'd like to create a timeout during connect. So far I've tried not calling accept in my mock server and setting the backlog to 1, then making multiple connections, but all seem to successfully connect. I would think that if there wasn't room in the backlog queue I would at least get a connection refused error if not a timeout. I'd like to do this all programatically if possible, but I'd consider using something external like IPchains to intentionally drop certain packets to certain ports during testing, but I'd need to automate creating and removing rules so I could do it from within my Boost.Test unit tests. I suppose I could mock the various system calls involved, but I'd rather go through a real TCP stack if possible. Ideas?

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• What open source document-oriented database system is most mature for Windows usage?

  - by jdk

  After using relational databases as back-end storage all my Windows programming life (currently .NET), I want to experiment with a document-oriented database by this Wikipedia definition; it can be standalone or layered over an existing non-commercial database system. What open source document-oriented database solution would you recommend from your own experience and why? A nice to have would be a .NET provider. Admittedly this is somewhat subjective and potentially argumentative so keep it real folks and I'll do the same - also your answers will be invaluable to others looking into document-oriented databases for the first time on Windows. I'm sure the overall value of your answers will outweigh any biases. Thanks.

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• UseConcMarkSweepGC verbose gc output shows memory drops

  - by user1864747

  I have an application for which I have enabled GC logging. The heap appears to grow then takes a sudden drop, but does not log a Full GC. If there some startup parameter that I can enable that will show me what GC event is reducing the heap size? My environment: Linux 64-Bit, java 1.6.0_31, Java HotSpot(TM) 64-Bit Server VM (build 20.6-b01, mixed mode) VM args: -server -Xms2560m -Xmx2560m -XX:+UseConcMarkSweepGC -XX:MaxPermSize=256m -XX:-PrintGC -XX: -PrintGCDetails -XX:-PrintGCTimeStamps -Xloggc:/xxxxx/gc.log -Dsun.rmi.dgc.client.gcInterval=86400000 -Dsun.rmi.dgc.server.gcInterval=86400000 3057.609: [GC 2397254K->2385777K(2619328K), 0.0572310 secs] 3058.898: [GC 2402801K->2391301K(2619328K), 0.0566620 secs] 3059.940: [GC 2408325K->2397156K(2619328K), 0.0534080 secs] 3059.995: [GC 2397265K(2619328K), 0.0069950 secs] 3065.635: [GC 2414180K->2404934K(2619328K), 0.0732700 secs] 3065.849: [GC 2419994K(2619328K), 0.1150630 secs] 3070.248: [GC 1593931K->1591825K(2619328K), 0.1084230 secs] 3072.440: [GC 1608552K->1606431K(2619328K), 0.0533140 secs] 3087.759: [GC 1623455K->1614544K(2619328K), 0.0215850 secs] What event is causing the heap to shrink between the output at 3065.849 and 3070.248? Is there a VM param that will log it? I tried adding -verbose:gc but that does not change the output.

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• Python: Importing a variable inside of a infinite loop

  - by Jack

  I have two modules, a host and a scanner. Both loop indefinitely to communicate with the serial ports. I want to import the variable "bestchannel" from scanner into host but by importing it, the while loop inside scanner runs first and loops forever. I want each module to run separately but be able to send each other data in real time. Is this possible? (outside of scanning ram) Example Code: http://pastebin.com/pxUBaima I want minchannel from scanner to be accessible to host.

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• iPhone - Landscape Only App

  - by Robert

  Hello all! I am trying to make an app that will only be viewed in Landscape. I have looked up some tutorials (albeit older ones) and have done the following: -set up the info.plist to include a key for uiinterfaceorientation -in the main view controller I have set the frame to be 480 x 320 Now, the first screen loads up ok. Everything is where it should be and whatnot. However, if I click a button that is set to present a modal view controller nothing happens. Everything is linked and coded correctly but nothing happens when I press the button. Am I doing something wrong with trying to force landscape? At it's basic, this question is a how do you effectively make an app that will only be in landscape mode? Thanks for any help.

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• How to generate <a> tag from input fields

  - by NonProgrammer

  Using ASP.Net (in C#), I need to generate a tag that contains person's name, address, etc. I have barely any experience with ASP.NET (or .NET languages) and I am given this assignment. Could someone please guide me to correct path please? Link should look like this: https://example.com/PRR/Info/Login.aspx?SupplierId=36&RegisteredUserLogin=T000001&Mode=RegisteredLoginless&RegisteredModeFunction=AutoShowTotals&RegisteredModeFunction=AutoShowTotals&PayerCountry=FI&[email protected]&ExternalOrderId=1000123&ServiceId=286&Amount286=5000.00&PayerInfo286=T000001|10000123|type1|m&SuccessReturnURL=http://success.html&FailureReturnURL=http://failure.html&SuccessCallbackURL=http://youpay.com/p247/success.html&FailureCallbackURL=http://yourfailure.html following components/fields needs to be sent to API in order to pre-populate information for users: FirstName, LastName, SupplierID = integer, Person's userlogin (Should increment by 1. Example: person 1 = t00001. Person2 = t00002, etc.), PayerCountry, Email, amount For some reason, my management thinks that this is something a non-technical person can do! Any help would be appreciated! Thanks!

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• ExtJs combobox dispalyfield with hyperlink

  - by abhishek

  I want combobox displayfield value with hyperlink. The selected combobox value should display with a hyperlink, if I click that selected combobox value then it will open in a new tab. var multiComboMap = Ext.create('Ext.form.field.ComboBox', { fieldLabel: 'Select multiple states', renderTo: 'combo-map', multiSelect: true, //disabled: true, displayField:'locationMap', valueField:'locationId', id:'combo-map', width: 500, labelWidth: 130, emptyText: 'To view map select it', store: Ext.create('Ext.data.Store', //get data for the combobox { fields: [ { name: 'locationId', type: 'int' },{ name: 'locationName', type: 'string' },{ name: 'locationMap', type: 'string' } ], proxy: { type: 'ajax', //url: '../data/users.asp', url: '/AOP_MEETING/venueMaster.json', reader: { type: 'json', root: 'venueMasterc' } }, autoLoad: true }), triggerAction:'all', mode:'local', typeAhead: true, lastQuery:'' }); Thanks in advance.

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• How select data from SQLite table where date = week of year?

  - by vovaxo

  I have table expense: "create table " + Expense.TABLE_NAME + "(" + Expense.ID + " integer primary key autoincrement not null, " + Expense.CATEGORY_ID + " integer, " + Expense.ITEM + " text, " + Expense.PRICE + " real, " + Expense.DATE + " date, " + Expense.TIME + " time);"; And I want to select Expense.PRICE where Expense.DATE = current day/week/month. I tried to do this cursor = mDB.rawQuery("select " + Expense.PRICE + " where " + " (strftime('%W', " + Expense.DATE + "))" + "=" + week, null); where week is week = calendar.get(Calendar.WEEK_OF_YEAR); but it gives an error in cursor: 09-15 09:32:02.647: E/AndroidRuntime(18939): Caused by: java.lang.NullPointerException 09-15 09:32:02.647: E/AndroidRuntime(18939): at com.pllug.summercamp.expensemanager.DataAdapter.getPrice(DataAdapter.java:242)

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• What's wrong with consuming ConfiguredTaskAwaitable from PortableClassLibrary's class under Debugger from MSTest Runner or Console App?

  - by Stas Shusha

  *Its only Debug-time error, but a very weird one. Problem: While running with Debugger attached and calling a method, exposed in separate Portable library, returning ConfiguredTaskAwaitable, we get InvalidProgramException. Repro: Having 2 projects: PortableClassLibrary (supporting .Net 4.5; Windows Store; Windows Phone 8) with 1 class: public class Weird { public static ConfiguredTaskAwaitable GetConfiguredTaskAwaitable() { return new ConfiguredTaskAwaitable(); } } ConsoleApplication with code: static void Main(string[] args) { Weird.GetConfiguredTaskAwaitable(); } Notes: replacing ConfiguredTaskAwaitable with ConfiguredTaskAwaitable<T> (a generic version) fixes this strange issue consuming this method form WP8 or Win8 app under Debugger works fine. Currently it causes problems cause I cant run my Unit Tests under Debugger. I'm forced to change my "ObjectUnderTest" implementation to return generic ConfiguredTaskAwaitable<T>, which is fine for the real project, but still is only a workaround. The Question is: does anybody knows the reason of this error? It definitely related to Portable Class Library magic.

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