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• Resources for widget creation

  - by Kenji Crosland

  My rails app is about to go live and I'm trying to figure out how to create a widget based on data on the site. My Javascript is not too hot--limited to the O'reilly head first book on JS. I can read simple Javascript okay but when it comes to writing it I'm a little lost. That said, I hope to roll out a widget, maybe a wordpress plugin too soon after my app is launched. Does anyone know of any rails plugins, javascript templates, tutorials or books that can get me going? I did ask a similar question before here: But my limited knowledge of JS kept me from implementing the suggested answer properly.

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• Why are events and commands in MVVM so unsupported by WPF / Visual Studio?

  - by Edward Tanguay

  When creating an WPF application with the MVVM pattern, it seems I have to gather the necessary tools myself to even begin the most rudimentary event handling, e.g. AttachedBehaviors I get from here DelegateCommands I get from here Now I'm looking for some way to handle the ItemSelected event in a ComboBox and am getting suggestions of tricks and workarounds to do this (using a XAML trigger or have other elements bound to the selected item, etc.). Ok, I can go down this road, but it seems to be reinventing the wheel. It would be nice to just have an ItemSelected command that I can handle in my ViewModel. Am I missing some set of standard tools or is everyone doing MVVM with WPF basically building and putting together their own collection of tools just so they can do the simplest plumbing tasks with events and commands, things that take only a couple lines in code-behind with a Click="eventHandler"?

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• Changing Emacs Forward-Word Behaviour

  - by gvkv

  As the title says, how does one change the behaviour of emacs forward-word function? For example, suppose [] is the cursor. Then: my $abs_target_path[]= abs_path($target); <M-f> my $abs_target_path = abs[_]path($target); I know I could just use M-f M-b but as far as I'm concerned, that shouldn't be necessary and I'd like to change it. In particular, I want two things: When I press M-f, I want to go to the first character of the next word regardless of whether the point is within a word, within a group of spaces or somewhere else. Customize word-characters on a mode-by-mode basis. After all, moving around in CPerl mode is different than, say, TeX mode. So, in the above example, item 1 would have the cursor would move to the 'a' (and the point to it's left) after hitting M-f. Item 2 would allow me to define underscores and sigils as word characters.

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• Matlab tutorial for programmers

  - by Jonas

  I'm getting some new students soon, who will be writing Matlab code. They're new to Matlab, but they have experience coding in Java and C++. I'm going to have them go through the 'Getting Started' section of the Matlab help. In addition, I want to give a small tutorial with the goal to prevent them from making some of the most common mistakes people make when switching to Matlab ("Matlab starts counting at 1"), and show them some features that they may not be aware of when coming from other languages ("you can subtract a scalar directly from an array, and for vectors, there's bsxfun"). What are the most important things I should tell them?

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• .net 4.0 concurrent queue dictionary

  - by freddy smith

  I would like to use the new concurrent collections in .NET 4.0 to solve the following problem. The basic data structure I want to have is a producer consumer queue, there will be a single consumer and multiple producers. There are items of type A,B,C,D,E that will be added to this queue. Items of type A,B,C are added to the queue in the normal manner and processed in order. However items of type D or E can only exist in the queue zero or once. If one of these is to be added and there already exists another of the same type that has not yet been processed then this should update that other one in-place in the queue. The queue position would not change (i.e. would not go to the back of the queue) after the update. Which .NET 4.0 classes would be best for this?

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• Is there a way to list all the database queries my wordpress install is making for a given event?

  - by mattloak

  Using a method similar to the one described here: (http://stackoverflow.com/questions/14873/how-do-i-display-database-query-statistics-on-wordpress-site), I can see the total number of queries being made when I load a page. Now I'd like to output a list of the queries that are being made when the page loads. This would allow me to see who my biggest resource hogs are without having to go through the process of elimination of all my plugins and theme scripts. How would I do this? Thanks.

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• setTimout not stopping

  - by Ken

  Hi all, I'm building a quiz and user has 5 seconds to respond to the qeustion if he doesn't resond within the time the answer is 3(wich is a code for no answer). Timer updates just fine until you answer a qeustion from that point the timer runs out of control you see 5,3,4,0 and go to the next qeustion with the answer 3 does anyone know how to kill the old timer? function tijd(aantalSec){ document.getElementById("sec").innerHTML = aantalSec; if(aantalSec == 0){ clearTimeout(tijd); antwoord(3); }else{ aantalSec = aantalSec - 1; var tijd = setTimeout('tijd(' + aantalSec + ',0)',1000); } }

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• ASIHTTP: addOperation when other threads are running

  - by user262325

  Hello everyone I have a project using ASIHTTP to multi download files from a site when I add a new request: [networkQueue cancelAllOperations]; [networkQueue setDownloadProgressDelegate:a]; [networkQueue setDelegate:self]; [networkQueue setRequestDidFinishSelector:@selector(requestDone:)]; NSURL *url = [NSURL URLWithString:@"http://www.google.com"]; ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:url]; [request setDelegate:self]; [request startAsynchronous]; [networkQueue addOperation:request]; [networkQueue go]; it reported: * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* -[ASINetworkQueue addOperation:]: operation is executing and cannot be enqueued' It looks like I can not add a new request when others are running. Welcome any comment Thanks interdev

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• How do I specify the block object / predicate required by NSDictionary's keysOfEntriesPassingTest ?

  - by Todd

  For learning (not practical -- yet) purposes, I'd like to use the following method on an NSDictionary to give me back a set of keys that have values using a test I've defined. Unfortunately have no idea how to specify the predicate. NSDictionary keysOfEntriesPassingTest: - (NSSet *)keysOfEntriesPassingTest:(BOOL (^)(id key, id obj, BOOL *stop))predicate Let's say for example all my values are NSURLs, and I'd like to get back all the URLs that are on port 8080. Here's my stab at coding that -- though it doesn't really make sense to me that it'd be correct: NSSet * mySet = [myDict keysOfEntriesPassingTest:^(id key, id obj, BOOL *stop) { if( [[obj port] isEqual: [NSNumber numberWithInt: 8080]]) { return key; }] And that's because I get back the following compiler error: incompatible block pointer types initializing 'void (^)(struct objc_object *, struct objc_object *, BOOL *)', expected 'BOOL (^)(struct objc_object *, struct objc_object *, BOOL *)' What am I missing? I'd appreciate a pointer at some docs that go into more detail about the "Block object" that the predicate is supposed to be. Thanks!

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• ATL OR C# for windows shell/namespace extenssion?

  - by _Avishay_

  Hi, i have a question, after allot of hours in googling and reading articles, i understood that namespace extenssion in windows is quite tricky (In C++ at least), now i've also seen its possible to do so in C# , but microsft does'nt officaly confirms using .net for namespace extensions... though i have seen very nice commercial Namespace Extenssion framework , but none is free.... so to my question :) , i want to develop my own Namespace Extenssion ,i have C++/C# knwoledge and basic COM/ATL , but if it can be done i prefer c#, so does c# inteop can fully do the work without too many tricks ? or one shall go diving in the ATL to create the neccessary COM objects... and another question , can i program to Windows O/S with C# anything that can be done in C++/ATL/MFC ? thanks!

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• How to use genstrings across multiple directories?

  - by mystify

  I have an directory, which has a lot of subdirectories. those subdirs sometimes even have subdirs. there are source files inside. How could I use genstrings to go across all these dirs and subdirs? Let's say I cd to my root dir in Terminal, and then I would type this: genstrings -o en.lproj *.m How could I tell it now to look into all these directories? Or would I have to add a lot of relative paths comma separated? how?

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• Careers in Computer Security? [closed]

  - by Joey Green

  I have the opportunity to go back for MSCS and the closest college's main research is in computer security and forensics. I've always been interested in computer networks and security but I have no interest whatsoever to run cables or add users to the network( which is what the network people do where I currently work ). I wanted to know how may I find out the types of day to day task a computer security expert does? I don't mean the jobs you find on dice or indeed. I'm talking about the type of careers that start out at the NSA or DIA. Also, I'm wondering what the pay is like for these types of fields? Thanks to all that reply.

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• Externalising Google Maps InfoWindow Content When Marker Is Selected

  - by Mark

  Hi, I'm wondering if anyone knows whether it is possible to take the content of a Google Maps InfoWindow and place it in an external DIV when the marker on the map is clicked? I've had a good dig around both the API docs and Google to see if I can find any examples or information relating to this but have had no luck so far. However I've not had a lot of time since I got asked about this one so I have had to skim a bit so it could be that I've missed something but nothing seems to be jumping out at me. Essentially I'd just like to know if this is indeed possible so that I don't waste anymore time researching something that is currently not possible with Google Maps. However if anyone has any code, examples, or ideas about how to go about doing this then that would be a very much appreciated! Thanks, Mark

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• c#-excel interop - create chart on workbook as opposed to in a sheet

  - by david.barkhuizen

  Using c# MS Excel interop library, I would like to programmatically create a new chart on the workbook, as opposed to on an a sheet. The code below allows me to create a chart on an existing _Worksheet (sheet). using using Microsoft.Office.Interop.Excel; _Worksheet sheet; (assume this is a reference to a valid _Worksheet object) ChartObjects charts = (ChartObjects)sheet.ChartObjects(Type.Missing); ChartObject chartObject = (ChartObject)charts.Add(10, 80, 300, 250); Chart chart = chartObject.Chart; chart.ChartType = XlChartType.xlXYScatter; Does anyone know how to rather go about creating a chart on the workbook (i.e. where the chart is the sheet).

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• Comparison of music data

  - by Christian P.

  Hey I am looking for theory, algorithms and similar for how to compare music. More specifically, I am looking into how to dupecheck music tracks that have different bitrates or perhaps slightly different variations (radio vs album version), but otherwise sound the same. Use cases for this include services such as Grooveshark, Youtube, etc. where they get a lot of duplicate tracks. I am also interested in text comparisons (Britney Spers vs Britney Spears, how far they deviate, etc.) although this is secondary and I already have some sources to go on in this area. I am mostly interested in codec-agnostic comparison techniques and algoritms (assuming a "raw" stream), but codec-specific resources are appreciated. I am aware of projects such as musicbrainz.org, but have not investigated it further, and would be interested if such projects could be of help in this endeavor.

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• How do i create an array of unequal length arrays?

  - by Faken

  Hello everyone, I need to create a sort of 2D array in which each one of the secondary arrays are of different length. I have a 1D array of known length (which defines the number of arrays to be formed) with each element having a number that denotes the length of the secondary array in that position. Each one of the arrays are fairly large so i don't want to create a one-size-fits-all "fake" 2D heap array to cover everything. How would i go about doing this? Any 2D array I have made before are always rectangular. I'm trying to do this so that i can create some code to dynamically generate threads to split up some workload. Thanks, -Faken

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• XAMPP or MAMP on Mac OS X 10.6.2 (Snow Leopard)

  - by Steve

  I just bought a new MacBook Pro which comes with Snow Leopard 10.6.2 (Mac OS X 10.6.2). I am used to using XAMPP as my local development server on XP. Since Mac OS X is based on Unix, I was thinking on activating/installing all the necessary stuff as I would normally do on Linux. However, I am not quite ready to be playing around with the system at this point so having an external package would be a nice temporary solution I think. The question is whether I should go with MAMP or XAMPP. Does anybody have any suggestions? The Pro and Cons I suppose. As far as I know, Mac OS X comes with Apache2 and PHP5. Would MAMP or XAMPP modify the existing Apache and PHP installation? Any comments on how I should proceed? PS: Eventually I would use the default installation of Apache and PHP, and install a binary package of MySQL but time for development is an essence and I don't have time to familiarize myself with Mac OS X.

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• Visual Studio: Add necessary using directives with macro

  - by Kiril

  Hello guys, I am trying to do the following. Imagine you are reading some LINQ article and you decide to copy/paste some code from the article to a newly created project. In most cases, if you directly compile you will probably get an error for missing a using directives or assembly reference. I am trying to optimize the process where I have to go each keyword, click on it with the mouse and hit Shift + Alt + F10 to add the using directive. I know that it is not that much pain, but for the sake of optimization, is it possible and at what cost? Best Regards, Kiril

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• jquery datepicker: select date as back as 6 months

  - by Abu Hamzah

  Start date: user can select start date as back as 6 months. example: if today is 04/23/2010 then i can go back up to 11/23/2009 but not more than 6 months. <script type="text/javascript"> $(document).ready(function () { $('#endDate').datepicker({ showOn: 'button', buttonImage: '../images/Calendar.png', buttonImageOnly: true, onSelect: function () { }, onClose: function () { $(this).focus(); } }); $('#startDate').datepicker({ showOn: 'button', buttonImage: '../images/Calendar.png', buttonImageOnly: true, onSelect: function (dateText, inst) { $('#endDate').datepicker("option", 'minDate', new Date(dateText)); } , onClose: function () { $(this).focus(); } }); }); update code: var currentDate = new Date(); var currentMonth = currentDate.getMonth() + 1; var sixMonths = currentMonth + 6 currentDate.setMonth(currentDate.currentMonth, sixMonths); var myNewCurrentDate = new Date(currentDate) $('#startDate').datepicker('option', { minDate: myNewCurrentDate }); i am getting currentDate = NaN

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• How to create virtual Environment for users on server

  - by Bhushan Nagaonkar

  I have a web application where users can register them self and then save Java and C++ programs in their account. Programs are saved in a tmp directory like, /tmp -user1 --program1 --program2 -user2 --program1 --program2 So all the users folders are in same "tmp" directory. I want to know how can I proved security by not allowing a user to access files of other users. A user will be executing a java or c++ program in his folder which can be used to read files on the server. How to prevent this? I am new to this thing I don't know how to go about this. The server is Linux server and project is in python using Django. Thank in advance

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• Why isn't WH_MOUSE hook global anymore?

  - by Valentin Galea

  I have this global mouse hook setup in a DLL that watches for mouse gestures. Everything works perfectly but with a hook set for WH_MOUSE_LL which is a low-level hook and one that doesn't need to be in an external injectable DLL. Once I switch - to the more suitable one would say - WH_MOUSE mouse hook, everything falls apart. Once I click outside my main application (the one that installs the hook), the hook gets corrupted - ::UnhookWindowsHookEx will fail. I only found this guy saying at experts exchange: "No way, at least under Windows XP + SVP2 WH_MOUSE won't go global, you must use WH_MOUSE_LL instead." I setup the hooks correctly: in a DLL using a shared data section, posting and not sending messages from the hook proceduce. Why has this changed? And why is not documented? Anyone encountered this? Thanks! BTW: I've reverse engineered a bit the popular StrokeIt application and it uses a combination of WH_GETMESSAGE and WH_MOUSE hooks and still works on XP/Vista...

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• Document: How do I include a random fragment from another document

  - by NXT

  I have a word document that I am converting to docbook. This word document has short sections that are quoted from another document. I thinking that I should use a blockquote or sidebar to contain the quoted document. But how do I go about making random headings in non sequential order? For example I might be quoting a section of a document that looks like this: -------------------------------------- B. Damage Assessment blah...paragraphs B.1 Responsibilities. some stuff... B.2 Authority some more stuff... -------------------------------------- Those headings are totally unrelated to the flow of the containing document. Is this an appropriate place to use the bridgehead element?

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• Is Haskell "mainstream", or is it mainly used by hobbyists and academics?

  - by Asher

  I came across a post where someone wrote something inaccurate about Haskell (won't go into it) and he got flammed for it. Which (pleasantly) surprised me. About 3 years ago I read this joke about Haskell: All the haskell programmers in the world can fit into a 747 and if that plane were to crash no one would care... or something along those lines. Which brings me to my question: how healthy is the Haskell community, anyway? Is Haskell "mainstream"? Is it mainly used by hobbiest and academics or someone making some serious money from it (which is the true yardstick of how good a language is - just kidding, geez!)?

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• How do I git reset --hard HEAD on Mercurial?

  - by obvio171

  I'm a Git user trying to use Mercurial. Here's what happened: I did a hg backout on a changeset I wanted to revert. That created a new head, so hg instructed me to merge (back to "default", I assume). After the merge, it told me I still had to commit. Then I noticed something I did wrong when resolving a conflict in the merge, and decided I wanted to have everything as before the hg backout, that is, I want this uncommited merge to go away. On Git this uncommited stuff would be in the index and I'd just do a git reset --hard HEAD to wipe it out but, from what I've read, the index doesn't exist on Mercurial. So how do I back out from this?

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• How do I get the size of a response from a Spring 2.5 HTTP remoting call?

  - by aarestad

  I've been poking around the org.springframework.remoting.httpinvoker package in Spring 2.5 trying to find a way to get visibility into the size of the response, but I keep going around in circles. Via another question I saw here, I think what I want to do is get a handle on the InputStream that represents the response from the server, and then wrap it with an Apache commons-io CountingInputStream. What's the best way to go about doing this? For the moment, I'd be happy with just printing the size of the response to stdout, but eventually I want to store it in a well-known location in my app for optional display.

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