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  • Adapting methods which return true/false

    - by James P.
    What's the best practise when adapting C-style functions which return a true/false to Java? Here's a simple method to illustrate where the problem lies. public static boolean fileNameEndsWithExtension( String filename, String fileExtension) { return filename.endsWith( fileExtension ); } Note that there's probably a more elegant way of filtering files (feel free to comment on this). Anyway, if filename is a null value, does one: Return a false if filename is null? If so, how does one go about distinguishing between the case where filename is null and the case where the String or file name doesn't end with a given file extension? Change the return type to the wrapper class Boolean which allows a null value. Throw an Exception and force the programmer to make sure that a null value is never passed to the method? Use another solution?

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  • DataGrid : Binding with two different classes with lists ? WPF C#

    - by MyRestlessDream
    It is my first question on StackOverflow so I hope I am doing nothing wrong ! Sorry if it is the case ! I need some help because I can not find the solution of my problem. Of course I have searched everywhere on the web but I can not find it (can not post the links that I am using because of my low reputation :( ). Moreover, I am new in C# and WPF (and self-learning). I used to work in C++/Qt so I do not know how everything works in WPF. And sorry for my English, I am French. My problem My basic classes are that an Employee can use a computer. The id of the computer and the date of use are stored into the class Connection. I would like to display the list information in a DataGrid and in RowDetailsTemplate like here : http://i.stack.imgur.com/Bvn1z.png So it will do a binding to the Employee class but also to the Connection class with only the last value of the property (here the last value of the list "Computer ID" and the last value of the list "Connection Date" on this last computer). So it is a loop in the different lists. How can I do it ? Is it too much to do ? :( I succeed to get the Employee informations but I do not know how to bind the list of computer. When I am trying, it shows me "(Collection)" so it does not go inside the list :( Summary of Questions How to display/bind a value from a list AND from a different class in a DataGrid ? How to display all the values of a list into the RowDetailsTemplate ? Under Windows 7 and Visual Studio 2010 Pro version. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ EDIT ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Solution I have used the solution of Stefan Denchev. Here the modification of my class : http://i.stack.imgur.com/Ijx5i.png And the code used: <DataGrid ItemsSource="{Binding}" Name="table"> <DataGrid.Columns> <DataGridTextColumn Header="First Name" Binding="{Binding FirstName}"/> <DataGridTextColumn Header="Last Name" Binding="{Binding LastName}"/> <DataGridTextColumn Header="Gender" Binding="{Binding Gender}"/> <DataGridTextColumn Header="Last computer used" Binding="{Binding LastComputerID}"/> <DataGridTextColumn Header="Last connection date" Binding="{Binding LastDate}"/> </DataGrid.Columns> <DataGrid.RowDetailsTemplate> <DataTemplate> <DataGrid ItemsSource="{Binding ListOfConnection}"> <DataGrid.Columns> <DataGridTextColumn Header="Computer ID" Binding="{Binding ComputerID}"/> <DataGridTemplateColumn> <DataGridTemplateColumn.CellTemplate> <DataTemplate> <ListView ItemsSource="{Binding ListOfDate}"/> </DataTemplate> </DataGridTemplateColumn.CellTemplate> </DataGridTemplateColumn> </DataGrid.Columns> </DataGrid> </DataTemplate> </DataGrid.RowDetailsTemplate> </DataGrid> With in code behind : List<Employee> allEmployees = WorkflowMgr.Instance.AllEmployees; table.DataContext = allEmployees; And it works ! I have tryed to improve my fake example :) Hope it will help to another developer !

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  • Random numbers from binomial distribution

    - by Sarah
    I need to generate quickly lots of random numbers from binomial distributions for dramatically different trial sizes (most, however, will be small). I was hoping not to have to code an algorithm by hand (see, e.g., this related discussion from November), because I'm a novice programmer and don't like reinventing wheels. It appears Boost does not supply a generator for binomially distributed variates, but TR1 and GSL do. Is there a good reason to choose one over the other, or is it better that I write something customized to my situation? I don't know if this makes sense, but I'll alternate between generating numbers from uniform distributions and binomial distributions throughout the program, and I'd like for them to share the same seed and to minimize overhead. I'd love some advice or examples for what I should be considering.

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  • z-index not working in IE8 with the sortable jQuery plugin

    - by Ojtwist
    I'm working with the jQuery Sortable plugin to drag and drop images from one box to another box. This works fine in ff,chrome and safari but it fails in IE8. It seems that when you start dragging that the image is send to the back. I've tried to solve this by adding the z-index option to the sortable plugin, i've tried appending it to a node higher in the hierarchy (body). It appears that setting a z-index on every other item in the page would fix this, haven't tried it yet and i'm not planning on doing this because this would mess up alot. So the user can drag an image from 1 gallery to the next gallery screenshot of how it should work: http://img69.imageshack.us/i/draganddrop.jpg/ Some html: <!--SECOND ARROCRDION ITEM --> <a class="flickr_accordeon_header" id="flickr_second_header" href="javascript:;">__MSG__SEARCH_FOR_PHOTOS__</a> <div> <p class ="flickr_text" > __MSG__SEARCH_FOR_PHOTOS__</p> <form method="GET" action="javascript:;"> <p> <input type="text" value="__MSG__SEARCH__" id="flickr_key_input" class="flickr_changeColorNormal" /> <button class="s3d-button flickr_search" id="flickr_seach_button"> <span class="s3d-button-inner" >__MSG__SEARCH__</span> </button> <img src="/devwidgets/flickr/images/ajax-loader-gray.gif" alt="__MSG__LOADING_IMAGE__" id="flickr_loading_img" /> <a href="javascript:;" id="flickr_refresh_key_button"><img src="/dev/_images/recent_activity_icon.png" alt="refresh" title='refresh' /></a> </p> </form> <div id="flickr_input_error">__MSG__INPUT_ERROR__</div> <div id="flickr_input_same_error">__MSG__INPUT_SAME_ERROR__</div> **<div id="flickr_key_gallery" ><ul class="flickr_key_ul"><li></li></ul></div>** <div id="flickr_key_pagging" ></div> </div> </div> <!--SLIDING SIDEBAR --> <div id="flickr_sidebar" class="jcarousel-skin-tango"> <div id="flickr_side_paging"></div> **<ul> <li><img src="/devwidgets/flickr/images/drop-image.png" alt="__MSG__DROP_HERE__" class="flick_drop_here"></li> </ul>** </div> The images get rendered into the ul, so basically it's just an ul with li's with images javascript for sortable: horizontal: { helper: "clone", // Instead of dragging the real image a copy will be dragged connectWith: ["#flickr_sidebar ul"], // To be able to drag and drop an image to another image gallery they need to be connected cursor: 'pointer', //change the cursor when dragging opacity: 0.50, //Change the opacity while dragging appendTo: 'body', //When dropped the images need to be appended to the image gallery where they are dropped containment: 'body', //Make sure the user can't drag the images outside the widget revert: true, // if the user releases the image ouside the dropbox it'll return to it's original position zIndex: 9999 } I've tried it with setting the dragged image to absolute and the container on relative... doesn't work Anyone know how to solve this in IE8 ?

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  • which technology is best for a Facebook application Ruby on Rails or C# and ASP?

    - by Johnny
    hi, My friend and I want to write a Facebook application. We've narrowed down the list of possible technologies to Ruby on Rails and C# with ASP. Here are the pros and cons we've thought of. Cons: ASP - proprietary tools like Visual Studio etc. cost (lots of) money. We both don't know ASP (although we're not bad at C#). RoR - It's scripting so might be harder to maintain. My friend doesn't know RoR at all (but he's a fairly proficient programmer so will probably be able to pick it up quickly). Pros: ASP - Facebook has an official SDK for .NET. RoR - I know RoR. It's open source, free and has fast development time. What says the community? Is there something we haven't thought of?

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  • How can I connect a wired PC to the internet through my Macs wifi connection?

    - by David Weitz
    So I'll probably be buying a USB wifi adapater if I can't get this to work, but I'm trying. I have a wireless router at home and my Macbook Pro is connected to said wifi. My desktop doesn't have a wifi connection, but I've connected my macbook with my desktop via crossover cable. I enabled internet sharing on my macbook, but my Windows 7 desktop can't get a connection. I tried just regular file sharing and that works fine, but the internet sharing doesn't. I assume the goal is to get my PC to see my mac as the default gateway, but I've had no luck manually setting it. Here's the ifconfig output on my mac and my attempt at settings on windows: http://i.imgur.com/uJfUz.png

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  • Checkout Control Panel that updates pricing???

    - by Stefan
    Hello all, my first post here. I am not much of a programmer, I can tailor some things for my personal needs but thats about it. I am looking for a script (jQuery preferred I suppose) which is easy to incorporate and bind to a few DIVs to be updated dynamically. Nothing too deep, just something that can updated price at check-out... Could I get some recommendations on a solid and simple widget for this? I appreciate any help/suggestions!

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  • Python editor/IDE for OS X

    - by TheJuice
    As a (reasonably) new Python programmer, what IDEs or editors would you recommend for Python programming on OS X and why (i.e. what features/capabilities/workflow techniques really help)? I've used Xcode and played a bit with TextMate but I can't really say that either have really hit the spot for me (although TextMate's code completion is pretty neat, I think i've been spoilt with code-completion facilities provided by editors for statically-typed languages so maybe i'm subconsciously comparing apples and oranges) I'm looking to increase my efficacy with Python and any tips would be appreciated. I know people have asked similar questions for Python IDEs in general but I am specifically concentrating on OS X and the 'Mac way'. If Xcode or TextMate are thought highly of, perhaps some suggestions as to how I could get the most benefit from the tools would help.

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  • What programming languages do you consider indispensable in your experience?

    - by Federico Ramponi
    Each programming language comes with its concepts, best practices, libraries, tools, community, in one word: culture. Learning more than one programming language will make you a better programmer, for the more concepts you learn, the faster you will feel comfortable when the next language or technology will come. Mine, so far, are C, some C++, and Python, and many times I read that it would be worth learning LISP, for "the profound enlightenment experience you will have when you finally get it" (quoting Eric Raymond). My questions are: Which is the next one you would consider a good investment to learn? Of the many programming languages you have learnt and worked with, which ones do you consider to be an essential part of one's CS culture, and why? EDIT. Further question: is there any language you would sincerely advise to avoid as a waste of time? (The famous, and questionable, slatings in this letter from Dijkstra come to my mind.)

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  • iPhone development books

    - by hhafez
    I've looked on SO and it seems that most people have been recomending books as the best iphone development resource due to the lack of resources on the web. I've seen the book the The Pragmatic Programmer: iPhone SDK development been recomended a few times. I'm planning to go buy a couple of books. Which should I go for? Please give reason :) A bit of background : I have a strong background in C and I've played around with Cocoa so something iphone specific would be best ( but I'm open for suggestions ;)) Update I'm not looking for simple listings of iphone SDK related books, I can google that ;) I want books that people are reading/have read and would recomend :) Final Update I just ordered my copy of Beginning iPhone Development: Exploring the iPhone SDK. My main reasons on chosing it are that it's already in print (unlike the pragmatic one) and I looked at the preview on their website and I liked it.

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  • How do I get Xcode and TextMate to calibrate syntax highlighting colours the same way?

    - by Grant Heaslip
    This is a mostly insignificant problem, but it's been bugging me for a while and I figured someone on here might be as ridiculously OCD as I am (this is a programmer community after all). Basically, the problem is that TextMate doesn't seem to calibrate syntax highlighting colours, while Xcode does. What this means in practice is that, while I've faithfully recreated my TextMate theme in Xcode, the syntax highlighting in Xcode seems noticeably less vivid that it does in TextMate. If I use DigitalColor Meter to check the actual colours in Xcode, they don't match the values I entered, while in TextMate they do. Any ideas what's going on here? Thanks!

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  • Aplication for generating cross table

    - by Ajtak
    I need advice on whether there is an application for generating cross tables. I would imagine it so that I entered at the beginning of team names. Subsequently I wrote results, but always one and the second correct field would enrolled opposite result. I want it to count the total score etc. .. I hope I have expanded well. I would like recommendations for any program. In Excel I dont. Thank you a thousand times for any advice. http://imageshack.us/a/img849/9100/d70m.png

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  • how to proxy sql queries (INSERT, UPDATE e.t.c.)

    - by XakRu
    I have installed cluster MYSQL (galley with mariadb) As an application server installed Apache. on a server with Apache installed haproxy which proxies requests from php in this case installed for zabbix server cluster. But faced with deadlocks, now I want to proxy requests WRITE, INSERT, UPDATE to the second server. SELECT queries to the second and third server. I would be happy to see your suggestions. Please do not write: use mysql - proxy. I want to see what program it may to proxy SQL requests. scheme: http://www.gliffy.com/pubdoc/4474830/L.png

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  • How do I make java wait for boolean to run funciton

    - by TWeeKeD
    I'm sure this is pretty simple but I can't figure out and it sucks I'm up on suck on (what should be) an easy step. ok. I have a method that runs one function that give a response. this method actually handles the uploading of the file so o it takes a second to give a response. I need this response in the following method. sendPicMsg needs to complete and then forward it's response to sendMessage. Please help. b1.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { if(!uploadMsgPic.equalsIgnoreCase("")){ Log.v("response","Pic in storage"); sendPicMsg(); sendMessage(); }else{ sendMessage(); } 1st Method public void sendPicMsg(){ Log.v("response", "sendPicMsg Loaded"); if(!uploadMsgPic.equalsIgnoreCase("")){ final SharedPreferences preferences = this.getActivity().getSharedPreferences("MyPreferences", getActivity().MODE_PRIVATE); AsyncHttpClient client3 = new AsyncHttpClient(); RequestParams params3 = new RequestParams(); File file = new File(uploadMsgPic); try { File f = new File(uploadMsgPic.replace(".", "1.")); f.createNewFile(); //Convert bitmap to byte array Bitmap bitmap = decodeFile(file,400); ByteArrayOutputStream bos = new ByteArrayOutputStream(); bitmap.compress(CompressFormat.PNG, 0 /*ignored for PNG*/, bos); byte[] bitmapdata = bos.toByteArray(); //write the bytes in file FileOutputStream fos = new FileOutputStream(f); fos.write(bitmapdata); params3.put("file", f); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } params3.put("email", preferences.getString("loggedin_user", "")); params3.put("webversion", "1"); client3.post("http://peekatu.com/apiweb/msgPic_upload.php",params3, new AsyncHttpResponseHandler() { @Override public void onSuccess(String response) { Log.v("response", "Upload Complete"); refreshChat(); //responseString = response; Log.v("response","msgPic has been uploaded"+response); //parseChatMessages(response); response=picurl; uploadMsgPic = ""; if(picurl!=null){ Log.v("response","picurl is set"); } if(picurl==null){ Log.v("response", "picurl no ready"); }; } }); sendMessage(); } } 2nd Method public void sendMessage(){ final SharedPreferences preferences = this.getActivity().getSharedPreferences("MyPreferences", getActivity().MODE_PRIVATE); if(preferences.getString("Username", "").length()<=0){ editText1.setText(""); Toast.makeText(this.getActivity(), "Please Login to send messages.", 2); return; } AsyncHttpClient client = new AsyncHttpClient(); RequestParams params = new RequestParams(); if(type.equalsIgnoreCase("3")){ params.put("toid",user); params.put("action", "sendprivate"); }else{ params.put("room", preferences.getString("selected_room", "Adult Lobby")); params.put("action", "insert"); } Log.v("response", "Sending message "+editText1.getText().toString()); params.put("message",editText1.getText().toString() ); params.put("media", picurl); params.put("email", preferences.getString("loggedin_user", "")); params.put("webversion", "1"); client.post("http://peekatu.com/apiweb/messagetest.php",params, new AsyncHttpResponseHandler() { @Override public void onSuccess(String response) { refreshChat(); //responseString = response; Log.v("response", response); //parseChatMessages(response); if(picurl!=null) Log.v("response", picurl); } }); editText1.setText(""); lv.setSelection(adapter.getCount() - 1); }

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  • Disk Management

    - by Mars
    I'd like to know what's with all those unnamed drives. I've always thought they are what they say they are (recoveries and what not), why are there so many of them? and why do they all say 100% Free (i.e. they're all empty!). If that's the case, what happened to my recovery? Info: I'm on Dell Inspiron 7520 Windows 8 Single Language (Had Kali installed on SSD a couple of days ago, now I've just deleted that and will install Kali on VM on SSD, that's drive (S:). Screenshot (don't have enough reputation): https://www.dropbox.com/s/y8a1mfkycd5grhq/Screenshot%202014-06-08%2012.06.38.png

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  • Upload a .pdf file to a Sharepoint Document Library using Access vba

    - by Jim Shaffer
    Within an Access 2007 application, I'm creating a static report in .pdf format. I want to create it, then export the static report (not the data itself) to a Sharepoint Document Library. The intent is for it to be a public repository, no versioning. Each report will carry a unique name. I'm a seasoned vba programmer, but using Sharepoint services is new to me. How do I go about doing this? Assume I can identify the file name and location after I've generated it, and I know the Sharepoint library URL, and have permissions. Where do I go from there?

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  • Java technologies for web-development.

    - by Alex
    Hello. I'm PHP-programmer, but I'm extremely interested in learning Java. So I decided to change speciality from PHP to Java. At the moment I have an opportunity to try to make quite simple web-application (it should contain 2-3 forms, several pages with information from the database and authorization module) and also I have a chance to choose any technology I want. Besides I have about 3 months for this task. I've decided to develop site with Java technologies for the purpose of studying. I've already read a book about Java ("Java2 Complete Reference" by P.Naughton) and currently I'm reading "Thinking in Java" by B.Eckel. I clearly understand it's not enough for efficient development, but I want, at least, to try. I would be very appreciated for the advises, which framework (for example) or technology to choose (Spring, Grails etc.) and what primary aspects and technologies of Java should I pay attention to? Thank you in advance.

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  • where is POST params for WCF REST

    - by Costa
    Hi Can u put some code sample to get Post parameters sent by client to WCF REST webservice. The request is though a HttpWebRequest. The client will not serialize anything if I will request a certain XML format from PHP programmer, how to make WCF convert this XML to one parameter. currently I am trying to send the request like this and I am stuck HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://100.100.1.4000:2805/Something.svc/Bomba/Data.php"); request.ContentType = "text/xml"; request.Method = "POST"; StreamWriter stream = new StreamWriter(request.GetRequestStream()); { stream.Write("FirstName=0&LastName=2"); } request.GetResponse(); stream.Close(); Thanks

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  • Does any method exist quickly to detect valid range versions of used library

    - by daneel-yaitskov
    I'm a beginner Haskell programmer. I have written some useful code for the last six month. And I want to release a library from it. The code will use system installation cabal as any Haskell library. A library is released with cabal has a meta data file where there is a logical predicate from the libraries and their versions. A developer usually uses one set libraries. It tediously care a set of the sets libraries. How to know either my library is compiled successfully or not for some subset libraries?

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  • Which programming paradigm or language open most your mind?

    - by Dom De Felice
    It is often said that some programming languages exist that once grasped can open your mind and change the way you write software. A sort of "software design enlightenment", we can say. I heard this about Lisp, Smalltalk, Haskell, pure functional programming in general.. What are your experiences about this? I know that the right language to use depends on your needs, but I would like to know the one that better improve your programming skills in general. What do you think would be the best language/paradigm to learn to end up being a better programmer in the long run?

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  • What is the best CPU I could get for my old setup?

    - by cmbrnt
    On my current not-so-good desktop computer, I'm currently running an Intel Core 2 Duo E6550-CPU, and I'm thinking of buying a newer one now that these must be cheap on E-bay and the like. Being a software guy, I'd be grateful for any help in identifying what CPUs that would fit my motherboard so I don't buy a processor which won't work with my computer. It might not be worth it however, since the SATA2-drive is currently what's bottlenecking my system, but I'm still curious about what could be done except for buying an SSD-drive. I'm providing screenshots of CPU-Z running, to help with the identification. My CPU- and motherboard info: http://i.imgur.com/YdO8x.png

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  • Why isn't the inline element inheriting height from its children?

    - by jbarz
    I'm trying to make a rather complicated grid of images and information (almost like Pinterest). Specifically, I'm trying to inline position one set of <ul>s right after another. I have it working but one aspect is causing issues so I'm trying to ask about this small piece to avoid the complication of the whole problem. In order to horizontally align the images and their information we are using inline <li>s with other inline-block level elements inside of them. Everything works correctly for the most part except that the <li>s have almost no height. HTML and CSS is in JSFiddle here if you want to mess with it in addition to below: HTML: <div> <ul class="Container"> <li> <span class="Item"> <a href="#"><img src="http://jsfiddle.net/img/logo.png"/></a> <span class="Info"> <a href="#">Title One</a> <span class="Details">One Point One</span> </span> </span> </li> <li> <span class="Item"> <a href="#"><img src="http://jsfiddle.net/img/logo.png"/></a> <span class="Info"> <a href="#">Title Two</a> <span class="Details">Two Point One</span> </span> </span> </li> </ul> CSS: .Container { list-style-type:none; } .Container li { background-color:grey; display:inline; text-align:center; } .Container li .Item { border:solid 2px #ccc; display:inline-block; min-height:50px; vertical-align:top; width:170px; } .Container li .Item .Info { display:inline-block; } .Container li .Item .Info a { display:inline-block; width:160px; } If you check out the result in the jsfiddle link you can see that the grey background only encompasses a small strip of the whole <li>. I know that changing the <li> to display:inline-block solves this problem but that isn't feasible for other reasons. So first of all, I'm just looking to see if anyone understands why the inline <li> element doesn't have any height. I can't find anything in the spec that explains this. I know I can't add height to an inline element but any explanation as to why this is happening that might enable me to fix would be great. Secondly, if you inspect the elements using IE's Developer Mode you will see that although the background color is in the correct location, the actual location of the <li>'s bounding box is at the bottom of the container according to hovering over the element. I could deal with this problem if it was at the top in every browser but it apparently varies. NOTE: I don't really care about older browsers in this case but I don't use HTML5 or JavaScript positioning. Thanks.

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  • What would be the simplest way to deal with a text file using JSP?

    - by Nano Taboada
    First and foremost I should acknowledge that I have no experience at all using Java ServerPages, but I'm positive about achieving this task if you guys help me out a bit since it doesn't seem like something difficult for a seasoned JSP programmer. Anyway the thing is, there's an actual running JSP application within a *NIX box which I somewhat administer with kind of good permissions. The idea is to create a new but dead simple JSP page to control some Korn Shell scripts I've got running there. So the goal is to make some sort of HTML form that will be writing some kind of scriptStatus.on / scriptStatus.off file: #!usr/bin/ksh # coolScript.sh # This is my cool script that is being launched by cron every 10 minutes. if [ -e scriptStatus.off ] then # monitor disabled else # monitor enabled fi which then can be checked for existence within the running script, therefore allowing to easily activate / deactivate it without actually have do deal with cron. Please let me know if all this does make any sense and don't hesitate to ask as much questions as needed. Thanks much in advance!

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  • Destination host unreachable

    - by user1010101
    I have 2 router connected to 1 switch which contains two vlans, 1 router has the ip table of vlan1 and the other router have the ip table of vlan2 I have trunked both router cable to the switch. I have set 1 ip table per router which correspond to the ip address of the PC that have this router address as a gateway. When I ping from 192.168.100.2 to 192.168.200.2 it tells me that destination host is unreachable and the message is from the router 192.168.100.1. So I guess router for 192.168.100.x does not see the router for 192.168.200.x , right ? Or am I wrong ? What are good troubleshooting steps ? http://i.imgur.com/b94Ir.png is the representation of the network, i cannot post image since im not reputated enough.

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  • C++ Typing and OOP child classes

    - by Zack
    I'm a bit confused: If I have a base class A, and a class B which extends A, can a variable of the type A hold a value of the type B and vice versa? If yes, why? Aren't they completely different even if B is derived from A? How about type-safety? If this is possible, what things do I have to mind when taking use of this? How would this work out in terms of performance? Note: Sorry if I asked too many questions, just ignore them and just look out for those "marked" with the list decoration dot :) Also, this is not my homework. I'm a hobby programmer and have skills in scripting languages with OOP, yet I'm relatively new to OOP typing in C++.

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