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  • core data editor problems

    - by Peyman
    I was recommended by someone in Stack Overflow to use Core Data Editor http://christian-kienle.de/CoreDataEditor/ to manage the sqlite persistent store. However the latest version (3.0) crashes on launch everytime. Older versions load but I see nothing when i point the config to the persistent store and the object model directories. There is no documentation either. can someone point me to the right place to sort this problem? I am trying to find a more manageable way to coordinate core data development than sqlite consoles. thank you

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  • Normalization in plain English

    - by Yada
    I sort of understand the concept of database normalization but always have a hard time explaining it in plain English especially for a job interview. I have read the wikipedia post, but still find it hard to explain the concept to none developers. "Design a database in a way not to get duplicated data" is the first thing that comes to mind. Does anyone was a nice way to explain the concept of database normalization in plain English. And what are some nice examples to show the differences between first, second and third normal forms. Say you go to a job interview and the person asks: Explain the concept of normalization and how would go about designing a normalized database. What key points are the interviewer looking for?

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  • Detecting a Key Press Squashed by Another Application

    - by Eric Smith
    I have a WPF application I'm planning to use as an overlay for a DirectX game (specifically Bad Company 2). I'm using WM_KEYBOARD_LL hook to detect KeyDown events so I can bring my app to the foreground when a specific button is pressed. This works perfectly except for when the game is running (I've also noticed this problem with Window's "Chess Titans" so it may be a DirectX thing). As far as I can work out, when the game detects a keyboard press, it "eats" the event and doesn't pass the CallNextHookEx() method like it should, which would allow the key press message to be moved along to the next application in the queue. I'm wondering if there's any sort of work-around to this? It seems kind of unfair that a single application can just willy-nilly eat up messages like that. Thanks! :) Relevant MSDN documentation: http://msdn.microsoft.com/en-us/library/ms644985%28VS.85%29.aspx

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  • What's the best way to view/analyse/filter huge traces/logfiles?

    - by oliver
    this seems to be a reoccurring issue: we receive a bug report for our software and with it tons of traces or logfiles. since finding errors is much easier when having a visualization of the log messages/events over time it is convenient to use a tool that can display the progression of events in a graph etc. (e.g. wireshark (http://www.wireshark.org) for analyzing network traffic) what tool do you use for such a purpose? the problem with most tools i used so far is that they mercilessly break down when you feed them huge data traces ( 1GB) so some criteria for such a tool would be: can deal with huge input files ( 1 GB) is really fast (so you don't have to get coffee while a file is loading) has some sort of filtering mechanism

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  • Calculating Percentiles (Ruby).

    - by zxcvbnm
    My code is based on the methods described here and here. def fraction?(number) number - number.truncate end def percentile(param_array, percentage) another_array = param_array.to_a.sort r = percentage.to_f * (param_array.size.to_f - 1) + 1 if r <= 1 then return another_array[0] elsif r >= another_array.size then return another_array[another_array.size - 1] end ir = r.truncate another_array[ir] + fraction?((another_array[ir].to_f - another_array[ir - 1].to_f).abs) end Example usage: test_array = [95.1772, 95.1567, 95.1937, 95.1959, 95.1442, 95.061, 95.1591, 95.1195, 95.1065, 95.0925, 95.199, 95.1682] test_values = [0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0] test_values.each do |value| puts value.to_s + ": " + percentile(test_array, value).to_s end Output: 0.0: 95.061 0.1: 95.1205 0.2: 95.1325 0.3: 95.1689 0.4: 95.1692 0.5: 95.1615 0.6: 95.1773 0.7: 95.1862 0.8: 95.2102 0.9: 95.1981 1.0: 95.199 The problem here is that the 80th percentile is higher than the 90th and the 100th. However, as far as I can tell my implementation is as described, and it returns the right answer for the example given (0.9). Is there an error in my code I'm not seeing? Or is there a better way to do this?

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  • Custom component which displays voice recognition button if available

    - by steff
    Hi evereyone, I'd like to create a custom component which supports voice recognition. It will primarily be an extended EditText which should show the microphone button for voice recognition if it is available. I wanted to to look at the search app-widget on the homescreen but I don't find it in the source. This is intended to use the voice recognition as some sort of dictation device, i.e. the user does not have to type but use his voice instead. So could anyone please point me in some direction? Thanks in advance, Steff

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  • What are the Worst Software Project Failures Ever?

    - by Warren P
    Is there a good list of "worst software project failures ever" in the history of software development? For example in Canada a "gun registry" project spent around two billion dollars. (http://en.wikipedia.org/wiki/Gun_registry). This is of course, insane, even if the final product "sort of worked". I have heard of an FBI Case file system which there have been several attempts to rewrite, all of them so far, failures. There is a book on the subject (Software Runaways). There doesn't seem to be be a software "boondoggle" list or "fiasco" list on Wikipedia that I can see. (Update: Therac-25 would be the 'winner' of this question, except that I was internally thinking more of Software projects that had as their deliverable, mainly software, as opposed to firmware projects like Therac-25, where the hardware and firmware together are capable of killing people. In terms of pure software monetary debacles, which was my intended question, there are several contenders.)

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  • .NET how to output csv from enumeration of anonymous type?

    - by Ronnie Overby
    Using FileHelpers, I decorated a class with [DelimitedRecord(",")] and was going to output an enumeration of objects of that type as CSV. But, it didn't work because my class inherits from ActiveRecordLinqBase<T>, which caused some problems. So, I was wondering if I could just select an enumeration of anonymous types and somehow have filehelpers generate csv from that. I don't like having to define a class just for FileHelpers to output csv. I would be open to using another csv library, but FileHelpers is proven. EDIT @Foovanadil: This would be the sort of thing I am trying to do: CreateCSV(MyCollection.Select(x=>new{ x.Prop1, x.Prop2, x.Prop3 })); Gives you: Prop1,Prop2,Prop3 val1a,val2a,val3a, val1b,val2b,val3b, etc.....

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  • Rendering PDFs from a database inside MVC views?

    - by Mohammad Sepahvand
    I was wondering if it's possible to do this without using 3rd party compnents in MVC 3. (I am open to free components though.) There are a couple of links out there but they seem to be mostly concerned with reporting and other code samples that do claim to do this sort of thing don't seem to compile. I'm not having any trouble saving and retrieving the PDFs to and from my database, but when I return the PDF as a File or a FileStreamResult the user is prompted with a download. A more desirable approach would be to actually render the PDFs inside the browser. I've had a look at iTextSHarp, it does the job to an extent, but it's not a complete solution. For example it will display the PDF inside the view if and only if the client has Adobe Reader installed, otherwise it prompts for a download. So technically, I'm mostly looking for a PDF viewer. Any ideas?

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  • SQL Loop over a family tree

    - by simon831
    Using SQL server 2008. I have a family tree of animals stored in a table, and want to give some information on how 'genetically diverse' (or not) the offspring is. In SQL how can I produce sensible metrics to show how closely related the parents are? Perhaps some sort of percentage of shared blood, or a number of generations to go back before there is a shared ancestor? AnimalTable Id Name mumId dadId select * from AnimalTable child inner join AnimalTable mum on child.[mumId] = mum.[Id] inner join AnimalTable dad on child.[dadId] = dad.[Id] inner join AnimalTable mums_mum on mum.[mumId] = mums_mum.[Id] inner join AnimalTable mums_dad on mum.[dadId] = mums_dad.[Id] inner join AnimalTable dads_mum on dad.[mumId] = dads_mum.[Id] inner join AnimalTable dads_dad on dad.[dadId] = dads_dad.[Id]

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  • jquery ui sortable serialize from children

    - by FFish
    I want to send an Array with image paths and captions to a PHP script after I sorted the images. I can do 'serialize' or 'toArray' on the lists, but how to get the attributes from the img tag? <ul class="gallery"> <li id="li-1"> <img src="tn/001.jpg" alt="first caption" /> </li> <li mycaption="some caption" id="li-2"> <img src="tn/002.jpg" alt="second caption with éèçà international chars" /> </li> </ul> $(".gallery").sortable({ update : function() { serial = $('.gallery').sortable('serialize'); alert(serial); /* $.ajax({ url: "sort.php", type: "post", data: serial, error: function() {alert("theres an error with AJAX");} }); */ } });

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  • Detect WebKit Version 525 and Below With RegEx

    - by Jay
    I'm no good at Regular Expressions, really! I would like to specifically detect WebKit browsers below version 525. I have a regular expression [/WebKit\/[\d.]+/.exec(navigator.appVersion)] that correctly returns WebKit/5….…, really, I'd like it to return only the version number, but if the browser isn't WebKit, return null, or better still 0. For example, if the browser was Trident, Presto or Gecko, return null, whereas if the browser is WebKit, return it's version number. To clarify, I would like the regular expression to check if navigator.appVersion contains WebKit and if it does not, return null, if it does, return the version number. I appreciate all your help! Please let's keep this focused, let's not flirt with jQuery or the sort, it's overkill in this scenario.

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  • can I override/redefine "global" Javascript functions, like confirm() and alert()?

    - by EndangeringSpecies
    I want to do some browser automation, and those pesky confirm/alert boxes are a real pain. Disabling javascript completely in this case is not an option, unfortunately. Well, so I was wondering, can I just change the definition of those methods as seen by my browser's javascript interpreter to basically do nothing and return true? Note that I do know about redefining them in the Javascript code directly, e.g. putting in function alert(message) { return true; } but AFAIK this is not a viable approach for this situation because when doing browser automation I have to work with other people's Javascript. Moreover, my program actually begins manipulating these websites already after the page has fully loaded into the browser, so I cannot just first automatically rewrite the javascript and then load the page. Well, so I was wondering if I could instead just "permanently" modify the way alert/confirm are implemented and executed in my browser. Sort of like the equivalent of dll injection and so forth in the realm of windows apps.

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  • MyClass cannot be cast to java.lang.Comparable: java.lang.ClassCastException

    - by user2234225
    I am doing a java project and I got this problem and don't know how to fix it. The classes in my project (simplified): public class Item { private String itemID; private Integer price; public Integer getPrice() { return this.price; } } public class Store { private String storeID; private String address; } public class Stock { private Item item; private Store store; private Integer itemCount; public Integer getInventoryValue() { return this.item.getPrice() * this.itemCount; } } Then I try to sort an ArrayList of Stock so I create another class called CompareByValue public class CompareByValue implements Comparator<Stock> { @Override public int compare(Stock stock1, Stock stock2) { return (stock1.getInventoryValue() - stock2.getInventoryValue()); } } When I try to run the program, it gives the error: Exception in thread "main" java.lang.ClassCastException: Stock cannot be cast to java.lang.Comparable Anyone know what's wrong?

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  • .Net friendly, local, key-value pair, replicatable datastore

    - by Brad Mathews
    I am looking for a key/value type datastore with very specific requirements. Anyone know anything that will work? Needs to be a component of some sort. No additional installation needed. The datastore needs to be on the local hard drive. I am using VB.Net for a desktop app running Windows XP through 7 so it needs to callable by that environment. It needs to replicatable. If I have four copies of my app running on the network, each local copy of the datastore needs to replicate with the others. As close to real time as possible. The first three are easy, I can do that with ADO.Net out of the box. The last one, replication, is the one I do not have answer to. Does such an animal exist? Thanks, Brad

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  • Cropping an image, saving output to a new file and get crop coordinates

    - by synic
    I'm interfacing with a service that allows you to upload an image, and also upload coordinates of a thumbnail of that image. I'm thinking that (if there isn't some sort of prefab Activity specifically for this) that I can use Android's crop utility. The only problem is that I can't overwrite the original file, the crop window needs to have a custom message (instead of "crop image"), and I'll need the coordinates of the crop. Is this possible? Is there another way to do this without writing my own Activity?

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  • MooTools Sortables with horizontal list having problems

    - by Anurag
    I am having problems sorting list items using the Sortables class when the list items are displayed horizontally. Removing this style fixed everything: display: inline Created an example on jsfiddle. This works. Check the stylesheet for .countries li - it does not display the list inline - http://jsfiddle.net/Wgpqw/ This does not work properly. I can drag the list items around the list, but the sort randomly happens when moving around - http://jsfiddle.net/Wgpqw/1/ I suspect it has something to do with the list element positioning in inline mode. Any help is greatly appreciated.

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  • Not sure whether to use haXe of just plain flash

    - by tominated
    Hi Guys, A local sports clothing company has hired me to make them a flash based jersey colour picker sort of thing. They are wanting it so users can check out what particular designs would look like with certain colours. Now, I'm by no means a great developer (I'm 16, but I know my way around javascript, flash and a bit of AS2) but I've taken notice of haXe recently and think it might be a good project to write in it and compile to a swf. I'm not sure if I should just use flash, or if I should use haXe. Is anybody able to iterate on the strengths and weaknesses of using haXe or flash please? Thanks in advance! P.S. I do have a copy of flash (supplied by school), so that doesn't concern me.

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  • Explain to me how the Method Profiler works in the DDMS, I get heap space error

    - by Pentium10
    I start the Method Profiler for a process, then leave it run for about 5-10 secs, then I stop it. I see a progress that a file is pulled from the sdcard, than I get this Exception [2010-05-23 18:45:42] Traceview: Exception in thread "main" java.lang.OutOfMemoryError: Java heap space [2010-05-23 18:45:42] Traceview: at java.util.Arrays.copyOf(Unknown Source) [2010-05-23 18:45:42] Traceview: at java.util.Arrays.copyOf(Unknown Source) [2010-05-23 18:45:42] Traceview: at java.util.ArrayList.toArray(Unknown Source) [2010-05-23 18:45:42] Traceview: at java.util.Collections.sort(Unknown Source) [2010-05-23 18:45:42] Traceview: at com.android.traceview.TimeLineView.setData(TimeLineView.java:370) [2010-05-23 18:45:42] Traceview: at com.android.traceview.TimeLineView.<init>(TimeLineView.java:316) [2010-05-23 18:45:42] Traceview: at com.android.traceview.MainWindow.createContents(MainWindow.java:95) [2010-05-23 18:45:42] Traceview: at org.eclipse.jface.window.Window.create(Window.java:431) [2010-05-23 18:45:42] Traceview: at org.eclipse.jface.window.Window.open(Window.java:790) [2010-05-23 18:45:42] Traceview: at com.android.traceview.MainWindow.run(MainWindow.java:60) [2010-05-23 18:45:42] Traceview: at com.android.traceview.MainWindow.main(MainWindow.java:224) What I am doing wrong?

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  • Reading Source Code Aloud

    - by Jon Purdy
    After seeing this question, I got to thinking about the various challenges that blind programmers face, and how some of them are applicable even to sighted programmers. Particularly, the problem of reading source code aloud gives me pause. I have been programming for most of my life, and I frequently tutor fellow students in programming, most often in C++ or Java. It is uniquely aggravating to try to verbally convey the essential syntax of a C++ expression. The speaker must give either an idiomatic translation into English, or a full specification of the code in verbal longhand, using explicit yet slow terms such as "opening parenthesis", "bitwise and", et cetera. Neither of these solutions is optimal. On the one hand, an idiomatic translation is only useful to a programmer who can de-translate back into the relevant programming code—which is not usually the case when tutoring a student. In turn, education (or simply getting someone up to speed on a project) is the most common situation in which source is read aloud, and there is a very small margin for error. On the other hand, a literal specification is aggravatingly slow. It takes far far longer to say "pound, include, left angle bracket, iostream, right angle bracket, newline" than it does to simply type #include <iostream>. Indeed, most experienced C++ programmers would read this merely as "include iostream", but again, inexperienced programmers abound and literal specifications are sometimes necessary. So I've had an idea for a potential solution to this problem. In C++, there is a finite set of keywords—63—and operators—54, discounting named operators and treating compound assignment operators and prefix versus postfix auto-increment and decrement as distinct. There are just a few types of literal, a similar number of grouping symbols, and the semicolon. Unless I'm utterly mistaken, that's about it. So would it not then be feasible to simply ascribe a concise, unique pronunciation to each of these distinct concepts (including one for whitespace, where it is required) and go from there? Programming languages are far more regular than natural languages, so the pronunciation could be standardised. Speakers of any language would be able to verbally convey C++ code, and due to the regularity and fixity of the language, speech-to-text software could be optimised to accept C++ speech with a high degree of accuracy. So my question is twofold: first, is my solution feasible; and second, does anyone else have other potential solutions? I intend to take suggestions from here and use them to produce a formal paper with an example implementation of my solution.

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  • QT vs. Net - REAL comparisons for R.A.D. projects

    - by Pirate for Profit
    Man in all these Qt vs. .NET discussions 90% these people argue about the dumbest crap. Trying to get a real comparison chart here, because I know a little about both frameworks but I don't know everything. I believe Qt and .NET both have strengths and weaknesses. This is to make a comparison that highlights these so people can make more informed decisions before embarking on a project, in the spirit of R.A.D. Event Handling In Qt the event handling system is very simple. You just emit signals when something cool happens and then catch them in slots. ie. // run some calculations, then emit valueChanged(30, false, 20.2); and then catching it, any object can make a slot to recieve that message easily void MyObj::valueChanged(int percent, bool ok, float timeRemaining). It's easy to "block" an event or "disconnect" when needed, and works seamlessly across threads... once you get the hang of it, it just seems a lot more natural and intuitive than the way the .NET event handling is set up (you know, void valueChanged(object sender, CustomEventArgs e). And I'm not just talking about syntax, because in the end the .NET anonymous delegates are the bomb. I'm also talking about in more than just reflection (because, yes, .NET obviously has much stronger reflection capabilities). I'm talking about in the way the system feels to a human being. Qt wins hands down for the simplest yet still flexible event handling system ever i m o. Plugins and such I do love some of the ease of C# compared to C++, as well as .NET's assembly architecture, even though it leads to a bunch of .dll's (there's ways to combine everything into a single exe though). That is a big bonus for modular projects, which are a PITA to import stuff in C++ as far as RAD is concerned. Database Ease of Doing Crap Also what about datasets and database manipulations. I think .net wins here but I'm not sure. Threading/Conccurency How do you guys think of the threading? In .NET, all I've ever done is make like a list of master worker threads with locks. I like QConcurrentFramework, you don't worry about locks or anything, and with the ease of the signal slot system across threads it's nice to get notified about the progress of things. QConcurrent is the simplest threading mechanism I've ever played with. Memory Usage Also what do you think of the overall memory usage comparison. Is the .NET garbage collector pretty on the ball and quick compared to the instantaneous nature of native memory management? Or does it just let programs leak up a storm and lag the computer then clean it up when it's about to really lag? Doesn't the just-in-time compiler make native code that is pretty good, like and that only happens the first time the program is run? However, I am a n00b who doesn't know what I'm talking about, please school me on the subject.

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  • Google Charts: Bar chart labels are reversed

    - by True Soft
    I create dinamically a chart for a website. I have a key/value map, I sort the values descending, and then create the url: http://chart.googleapis.com/chart? chs=400x200&cht=bhs&chbh=a&chdlp=l&chg=25,0&chma=0,0,0,5&chtt=Chart+test& chxr=0,0,8,1&chds=0,8&chxt=t,y& chd=t:8,5,3& chxl=1:|Label_8|Label_5|Label_3 The values are set by chd=t:8,5,3, and the labels are set by chxl=1:|Label_8|Label_5|Label_3. However, in the chart image the labels are reversed. I searched the documentation, but I didn't get why it is like this. Is it because I didn't set a value correctly, or is this the desired functionality? I could reverse the label texts in chxl from code to be displayed how I want. Is this the right way?

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  • Django openid authentication with google

    - by Zayatzz
    Hello I am looking into authenticating via google. I dont understand how it works:http://code.google.com/apis/accounts/docs/OpenID.html#Samples If i do that 2nd request by entering the data as one url with params into browser i get back XML file. Should i not get back sample response nr3? Can somebody explain this to me? The problem is, that im trying to sort through some third party app that uses google openid authentication and its not recieving authenticated users e-mail back, like in sample response 3. Alan PS i have read through similar questions and their responses and gone through pages like: http://stackoverflow.com/questions/353880/how-does-openid-authentication-works http://www.windley.com/archives/2006/04/how_does_openid.shtml http://tinisles.blogspot.com/2008/02/how-does-openid-work.html http://openid.net/pres/protocolflow-1.1.png etc..

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  • how to commit 'commit log' itself in same svn version?

    - by understack
    It might sound unnecessary, but let me explain my problem first. Probably then it would make sense. Few artists keep updating images based on clients' change requests. An artist makes changes accordingly and commits with proper 'commit messages'. Just before actual commit, I want to create a text file with image properties like size and all the 'commit messages'. And then this file would be committed itself. So basically some sort of pre-commit processing is required. Even though most of the artists are not very comfortable with svn, they can always see what changes were made last time to the image via simple text file. So artists only do update and commit with svn. How this could be done? Are there any better alternatives?

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  • PHP/MySQL User system w/ groups.

    - by Ben C
    I have a user system set up in a 'users' table, and I have groups set up in a 'groups' table. Essentially, I want users to be able to join any and all the groups that they want, in the same was as one would on facebook. How would one go about structuring this in a mysql/php database system? Just a quick summary would be helpful! I've looked around, but I can only find info on creating 'groups' where the users just have a sort of 1, 2 or 3 permission rank. Thanks!

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