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• Is calling Process.Refresh() required for Process.HasFinished

  - by Rekreativc

  Hello I am interested if calling Process.Refresh() is mandatory when waiting for the process to terminate by checking Process.HasFinished property? I have a piece of code that works fine without the Process.Refresh() call, however I am curious weather this is a coincidence? I can see that a msdn example has the Process.Refresh() call... If its not necessary, and Process.HasExited is the only property I need, are there any advantages to making the call to Process.Refresh() ? If not, is there a reason it is in the msdn example? Thank you for your answers.

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• "The stylesheet was not loaded because its MIME type, "text/html" is not "text/css".

  - by Null Pointer

  I have a javascript application and when I run it on firefox I am getting the following erro on the console: "The stylesheet was not loaded because its MIME type, "text/html" is not "text/css". DumbStuck!! EDIT: Note that it tells that "The stylesheet ABCD..." But ABCD is actually an HTML file. Edit (ANSWER) : Actually I had wrongly put href="", and hence the html file was refenecing itself as the CSS. Mozilla had the similar bug once, and it is from there I got the answer. But everyone's else answers helped me too. Thanks.

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• Using ETS Select To Form An Intersection

  - by Ruhi

  i have the following ets structure: SomeTable = ets:new(sometable, [bag]). ets:insert(SomeTable, [ {set1,item1}, {set1,item2}, {set1,item3}, {set2,item1}, {set2,item2}, {set2,item4}]). i want to get intersection of set1 and set2 using ets:select and fun2ms, result will be [item1, item2]. i spent hours and hours trying to accomplist it with ets:select and fun2ms with no success. can you help me out using ets:select and fun2ms? thanks for all answers! ps: i know about sets module, but i have to use ets and this exact data structure.

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• Programming challenge: can you code a hello world program as a Palindrome?

  - by Assaf Lavie

  So the puzzle is to write a hello world program in your language of choice, where the program's source file as a string has to be a palindrome. To be clear, the output has to be exactly "Hello, World". Edit: Well, with comments it seems trivial (not that I thought of it myself of course [sigh].. hat tip to cobbal). So new rule: no comments. Edit: I feel kind of bad editing someone else's question to say this, but it will eliminate a lot of non-palindromes that keep popping up, and I'm tired of seeing the same simple mistake over and over. The following is NOT a palindrome: ()() The following IS a palindrome: ())( Brackets, parenthesis, and anything else that must match are a major barrier to palindrome-ing, yes, but that doesn't mean you can ignore them and post non-palindrome answers. Languages represented thus far: C, C++, Bash, elisp, C#, Perl, sh, Windows shell, Java, Common Lisp, Awk, Ruby, Brainfuck, Funge, Python, Machine Language, HQ9+, Assembly, TCL, J, php, Haskell, io, TeX, APL, Javascript, mIRC Script, Basic, Orc, Fortran, Unlambda, Pseudo-code, Befunge, CFML, Lua, INTERCAL, VBScript, HTML, sed, PostScript, GolfScript, REBOL, SQL

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• SAP related testing

  - by mgj

  Dear all, One notion that has been prevalent mostly as rumours for many aspiring programmers is that the testing phase of the SDLC(Software Development Life Cycle) is not that challenging and interesting as one's job as a tester after a period of time becomes monotonous because a person does the same thing repeatedly over and over again. Thats why many have this complexion of looking for a developers job rather than that of testers. Don't testers have a space for themselves in software companies to grow..? Please feel free to express your views for or against this. How true is that, could you please give e.g.'s of instances( need not be practical, even theoretical would suffice) which actually contradict this statement wrt a tester's career specifically wrt the SAP domain. E.g.'s from other domains are also welcome. This question is not meant to hurt someone's feelings who is in the testing domain. Its just that for e.g. in my case I want to know what actually would be the challenge's a tester could also face in real life situations.Something that would make their job also interesting and fun-filled. I myself am pro-testing and also interested in pursuing testing as a profession in a sw co, just curious to know more about it so...:) Thanks..:)

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• Python encoding - Nothing works

  - by Luiz Fernando

  I've been looking the answers here in this web site, but nothing have worked so far. The problem is: In the database, strings are saved like that one: at &#8730;s = 7 TeV with. And the reason is that the "escape" JavaScript function was used. I was not able to "unescape" these strings in Python yet. I tried to use "eval", "decode", "re.sub" and others, but without success. So please, which function can I use to get it right?

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• Looking for a .NET 3.5 / J2EE architecture concept comparison article/chart

  - by Edward Tanguay

  We are thinking about combining .NET technology with Java technology (WCF, JBoss/ESB, MOM, WPF, WF) and I need to have a high-level idea of what are the apples and oranges in the .NET 3.5 and Java worlds. Does anyone know of a good, clear article or better yet a simple chart which answers questions such as: WCF in the Java world is __ the equivalent of WPF in the Java world is _ the closes thing to JBoss in the .NET world is _ the JVM and CLR are essentially the same except for these differences: .... in the Java world you don't have the concept of WF/WCF/WPF, instead you have .... there is no "LINQ" in the Java world yet, but you can use ___ the closest you get to ADO.NET Data Services in the Java world is .... I'm not looking to debate this so I'm not looking for "fighting points", I just need a neutral what-is-what chart comparing the two worlds.

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• Help needed in grokking password hashes and salts

  - by javafueled

  I've read a number of SO questions on this topic, but grokking the applied practice of storing a salted hash of a password eludes me. Let's start with some ground rules: a password, "foobar12" (we are not discussing the strength of the password). a language, Java 1.6 for this discussion a database, postgreSQL, MySQL, SQL Server, Oracle Several options are available to storing the password, but I want to think about one (1): Store the password hashed with random salt in the DB, one column Found on SO and elsewhere is the automatic fail of plaintext, MD5/SHA1, and dual-columns. The latter have pros and cons MD5/SHA1 is simple. MessageDigest in Java provides MD5, SHA1 (through SHA512 in modern implementations, certainly 1.6). Additionally, most RDBMSs listed provide methods for MD5 encryption functions on inserts, updates, etc. The problems become evident once one groks "rainbow tables" and MD5 collisions (and I've grokked these concepts). Dual-column solutions rest on the idea that the salt does not need to be secret (grok it). However, a second column introduces a complexity that might not be a luxury if you have a legacy system with one (1) column for the password and the cost of updating the table and the code could be too high. But it is storing the password hashed with a random salt in single DB column that I need to understand better, with practical application. I like this solution for a couple of reasons: a salt is expected and considers legacy boundaries. Here's where I get lost: if the salt is random and hashed with the password, how can the system ever match the password? I have theory on this, and as I type I might be grokking the concept: Given a random salt of 128 bytes and a password of 8 bytes ('foobar12'), it could be programmatically possible to remove the part of the hash that was the salt, by hashing a random 128 byte salt and getting the substring of the original hash that is the hashed password. Then re hashing to match using the hash algorithm...??? So... any takers on helping. :) Am I close?

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• jQuery fadeout a div that's revealed by php and not Javascript?

  - by songdogtech

  Seems like this might be easy, but from reading other SO answers there are a number of ways for it to possibly work: I have the "thanks" div below that shows when a php form is sucessfully submitted: <?php if(isset($emailSent) && $emailSent == true) { ?> <div class="thanks"></div> The page does not reload after the form is submitted; the php for the form is included in the page header, the php above is in <body>, and when the form is submitted, the "thanks" div appears. Question: How can the div be faded out (or simply removed) after a few seconds? Document ready doesn't seem like it would work because the page is not reloaded. Can jQuery detect the appearance of the div and then start the fadeout timer? If possible, I'd like to stay with the php form and not move to a jQuery form.

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• All possible values of int from the smallest to the largest, using Java.

  - by Totophil

  Write a program to print out all possible values of int data type from the smallest to the largest, using Java. Some notable solutions as of 8th of May 2009, 10:44 GMT: 1) Daniel Lew was the first to post correctly working code. 2) Kris has provided the simplest solution for the given problem. 3) Tom Hawtin - tackline, came up arguably with the most elegant solution. 4) mmyers pointed out that printing is likely to become a bottleneck and can be improved through buffering. 5) Jay's brute force approach is notable since, besides defying the core point of programming, the resulting source code takes about 128 GB and will blow compiler limits. As a side note I believe that the answers do demonstrate that it could be a good interview question, as long as the emphasis is not on the ability to remember trivia about the data type overflow and its implications (that can be easily spotted during unit testing), or the way of obtaining MAX and MIN limits (can easily be looked up in the documentation) but rather on the analysis of various ways of dealing with the problem.

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• What emoticons can you put into class names in your language?

  - by Chris Gill

  I've just had a "discussion" with a developer about naming classes in C#. My final throw away line was, "Let's not put any emoticons in our class names." I can't think of a way you could put emoticons in C# class names, but I haven't thought too hard about it. Is this possible? Does any programming language allow it? What would be the best/worst language to be able to perform this in? Update: The Scheme answer bests answers my question. It was a quick idea after a quick discussion so I'm going to accept after a short amount of time and then move on with my life. Thanks for the responses.

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• Does it make sense to commit after every save with a DVCS?

  - by blockhead

  I know the question has been asked before how often to commit with a DVCS. All answers have one thing in common--as often as possible. But they're usually something like, after finishing a thought, a user story, getting code that compiles, or passing tests. I was thinking, given that a DVCS gives you you're own repository, with very cheap commits, doesn't it make sense, to commit after every change to a file? After all, this is what happens in NetBeans, and you get a nice free "time machine" without even asking for it. If not every change, then at least every save, or compile. Does this make sense, or do I have the wrong idea about DVCS. My feeling is that this not the workflow most people have with DVCS.

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• What is best practice (and implications) for packaging projects into JAR's?

  - by user245510

  What is considered best practice deciding how to define the set of JAR's for a project (for example a Swing GUI)? There are many possible groupings: JAR per layer (presentation, business, data) JAR per (significant?) GUI panel. For significant system, this results in a large number of JAR's, but the JAR's are (should be) more re-usable - fine-grained granularity JAR per "project" (in the sense of an IDE project); "common.jar", "resources.jar", "gui.jar", etc I am an experienced developer; I know the mechanics of creating JAR's, I'm just looking for wisdom on best-practice. Personally, I like the idea of a JAR per component (e.g. a panel), as I am mad-keen on encapsulation, and the holy-grail of re-use accross projects. I am concerned, however, that on a practical, performance level, the JVM would struggle class loading over dozens, maybe hundreds of small JAR's. Each JAR would contain; the GUI panel code, necessary resources (i.e. not centralised) so each panel can stand alone. Does anyone have wisdom to share?

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• How mobile printer that work alone and with WIFI for POS app?

  - by mamcx

  I'm hunting for a mobile POS printer for use in a mobile point-of-sale application (BestSeller). The requeriments is that must work independent of anything except the mobile device. So the solution is only: Printer + iPhone. I have a early question on this, here but with not answers. The idea is that the printer work as their own server and I can send print commands to make tickets and that stuff. The salesman work outside the company,and have not ascces to internet or other facilities. I found this: http://www.barcodegiant.com/epson/mobilink.htm and http://www.barcodegiant.com/zebra/mz220.htm but is not clear to me if will work as I imagine. And also, I don't find any how to in how make the programing...

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• HTML 5: Is it <br> <br/> or <br />?

  - by Eikern

  I've tried checking other answers, but I'm still confused--especially after seeing W3schools HTML 5 reference. I thought HTML 4.01 was supposed to "allow" single-tags to just be <img> and <br>. Then XHTML came along with <img /> and <br /> (where someone said that the space is there for older browsers). Now I'm wondering how I'm supposed to format my code when practicing HTML 5. <!DOCTYPE HTML> Is it <br>, <br/> or <br />?

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• Link checker ; how to avoid false positives

  - by Burnzy

  I'm working a on a link checker/broken link finder and I am getting many false positives, after double checking I noticed that many error codes were returning webexceptions but they were actually downloadable, but in some other cases the statuscode is 404 and i can access the page from the browse. So here is the code, its pretty ugly, and id like to have something more, id say practical. All the status codes are in that big if are used to filter the ones i dont want to add to brokenlink because they are valid links ( i tested them all ). What i need to fix is the structure (if possible) and how to not get false 404. Thank you! try { HttpWebRequest request = ( HttpWebRequest ) WebRequest.Create ( uri ); request.Method = "Head"; request.MaximumResponseHeadersLength = 32; // FOR IE SLOW SPEED request.AllowAutoRedirect = true; using ( HttpWebResponse response = ( HttpWebResponse ) request.GetResponse() ) { request.Abort(); } /* WebClient wc = new WebClient(); wc.DownloadString( uri ); */ _validlinks.Add ( strUri ); } catch ( WebException wex ) { if ( !wex.Message.Contains ( "The remote name could not be resolved:" ) && wex.Status != WebExceptionStatus.ServerProtocolViolation ) { if ( wex.Status != WebExceptionStatus.Timeout ) { HttpStatusCode code = ( ( HttpWebResponse ) wex.Response ).StatusCode; if ( code != HttpStatusCode.OK && code != HttpStatusCode.BadRequest && code != HttpStatusCode.Accepted && code != HttpStatusCode.InternalServerError && code != HttpStatusCode.Forbidden && code != HttpStatusCode.Redirect && code != HttpStatusCode.Found ) { _brokenlinks.Add ( new Href ( new Uri ( strUri , UriKind.RelativeOrAbsolute ) , UrlType.External ) ); } else _validlinks.Add ( strUri ); } else _brokenlinks.Add ( new Href ( new Uri ( strUri , UriKind.RelativeOrAbsolute ) , UrlType.External ) ); } else _validlinks.Add ( strUri ); }

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• Discover the environment and relative path of the running application

  - by Shyam

  Hi, While playing with RubyCocoa, I keep progressing with my idea for my application. Because my application will be going to use configuration files, I would like to know how I discover the relative path to store these inside my application structure (or if a better idea emerges, please elaborate also the "why"). Also good for me to know is to discover environment variables, such as operating system version, the amount of memory that is available and such. Hyperlinks would be awesome too. Please notice I use RubyCocoa and thank you for your feedback, comments and answers!

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• SQL Query in Ruby: Only select the changes

  - by JJ Liu

  Suppose I have a table (PriceHistory) like this, every time I change anything in the row, I will record the whole row again in the table. id | buy_price | sell_price | change_date 1 | 2 | 2 | 2012-06-22 2 | 3 | 2 | 2012-06-20 3 | 2 | 6 | 2012-06-15 4 | 5 | 5 | 2012-06-15 5 | 5 | 7 | 2012-06-15 6 | 4 | 8 | 2012-06-12 I only care about the change of BuyPrice, Is there a way to just select row 1, 2, 3, & 5? Here is the Ruby code I come up with, but it does not only select the changed rows PriceHistory.select("id, BuyPrice, change_date"). order("change_date DESC") Both Ruby and SQL answers are fine.

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• appending to cursor in oracle

  - by Omnipresent

  I asked a question yesterday which got answers but didnt answer the main point. I wanted to reduce amount of time it took to do a MINUS operation. Now, I'm thinking about doing MINUS operation in blocks of 5000, appending each iterations results to the cursor and finally returning the cursor. I have following: V_CNT NUMBER :=0; V_INTERVAL NUMBER := 5000; begin select count(1) into v_cnt from TABLE_1 while (v_cnt > 0) loop open cv_1 for SELECT A.HEAD,A.EFFECTIVE_DATE, FROM TABLE_1 A WHERE A.TYPE_OF_ACTION='6' AND A.EFFECTIVE_DATE >= ADD_MONTHS(SYSDATE,-15) AND A.ROWNUM <= V_INTERVAL MINUS SELECT B.head,B.EFFECTIVE_DATE, FROM TABLE_2 B AND B.ROWNUM <= V_INTERVAL V_CNT := V_CNT - V_INTERVAL; END LOOP; end; However, as you see...in each iteration the cursor is overwritten. How can I change the code so that in each iteration it appends to cv_1 cursor rather than overwriting?

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• MVVM: Thin ViewModels and Rich Models

  - by Dan Bryant

  I'm continuing to struggle with the MVVM pattern and, in attempting to create a practical design for a small/medium project, have run into a number of challenges. One of these challenges is figuring out how to get the benefits of decoupling with this pattern without creating a lot of repetitive, hard-to-maintain code. My current strategy has been to create 'rich' Model classes. They are fully aware that they will be consumed by an MVVM pattern and implement INotifyPropertyChanged, allow their collections to be observed and remain cognizant that they may always be under observation. My ViewModel classes tend to be thin, only exposing properties when data actually needs to be transformed, with the bulk of their code being RelayCommand handlers. Views happily bind to either ViewModels or Models directly, depending on whether any data transformation is required. I use AOP (via Postsharp) to ease the pain of INotifyPropertyChanged, making it easy to make all of my Model classes 'rich' in this way. Are there significant disadvantages to using this approach? Can I assume that the ViewModel and View are so tightly coupled that if I need new data transformation for the View, I can simply add it to the ViewModel as needed?

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• Is release without prior retain dangerous?

  - by BankStrong

  I have some code which I think has extra release statements. Is the code incorrect? What is the end result? I don't understand memory management well yet - even after reading lots of articles and stackoverflow answers. Thanks for straightening me out. NSMutableArray *points = [NSMutableArray new]; for (Segment *s in currentWorkout.segments) { [points addObjectsFromArray:[s.track locationPoints]]; } [routeMap update:points]; [points release];

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• T-SQL SQL Server - Stored Procedure with parameter

  - by Ricardo Conte

  Please, the first TSQL works FINE, the second does not. I guess it must be a simple mistake, since I am not used to T-SQL. Thank you for the answers. R Conte. * WORKS FINE ******************* (parm hard-coded) ALTER PROCEDURE rconte.spPesquisasPorStatus AS SET NOCOUNT ON SELECT pesId, RTRIM(pesNome), pesStatus, pesPesGrupoRespondente, pesPesQuestionario, pesDataPrevistaDisponivel, pesDataPrevistaEncerramento, pesDono FROM dbo.tblPesquisas WHERE (pesStatus = 'dis') ORDER BY pesId DESC RETURN Running [rconte].[spPesquisasPorStatus]. pesId Column1 pesStatus pesPesGrupoRespondente pesPesQuestionario pesDataPrevistaDisponivel pesDataPrevistaEncerramento pesDono 29 XXXXXXXXX xxxxx dis 17 28 5/5/2010 08:21:12 5/5/2010 08:21:12 1 28 Xxxxxxxx xxxxxxxxxxxxx dis 16 27 5/5/2010 07:44:12 5/5/2010 07:44:12 1 27 Xxxxxxxxxxxxxxxxxxxxxxx * DOES NOT WORK ************** (using a parm; pesStatus is nchar(3)) ALTER PROCEDURE rconte.spPesquisasPorStatus (@pPesStatus nchar(3) = 'dis') AS SET NOCOUNT ON SELECT pesId, RTRIM(pesNome), pesStatus, pesPesGrupoRespondente, pesPesQuestionario, pesDataPrevistaDisponivel, pesDataPrevistaEncerramento, pesDono FROM dbo.tblPesquisas WHERE (pesStatus = @pPesStatus) ORDER BY pesId DESC RETURN Running [rconte].[spPesquisasPorStatus] ( @pPesStatus = 'dis' ). pesId Column1 pesStatus pesPesGrupoRespondente pesPesQuestionario pesDataPrevistaDisponivel pesDataPrevistaEncerramento pesDono No rows affected. (0 row(s) returned) @RETURN_VALUE = 0 Finished running [rconte].[spPesquisasPorStatus]

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• How to calculate dawn / dusk times

  - by ryyst

  Hi, I'm currently using this code to calculate the sunrise / sunset times. (To be more precise, I'm looking for civil dawn / civil dusk times which are defined as the time when the sun is between 0° and -6° altitude). As a next step, I'd like to compute the dawn beginning and dusk ending times. I believe the calculations must be very similar. My idea is that if I want to calculate the dawn beginning (dusk ending) time for a place I just calculate the sunrise (sunset) times for a place 6° farther east (west). Can somebody confirm this assumption, or am I thinking wrong? Thanks for answers! -- Ry

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• What is the most efficient Java Collections library?

  - by dehmann

  What is the most efficient Java Collections library? A few years ago, I did a lot of Java and had the impression back then that trove is the best (most efficient) Java Collections implementation. But when I read the answers to the question "Most useful free Java libraries?" I noticed that trove is hardly mentioned. So which Java Collections library is best now? UPDATE: To clarify, I mostly want to know what library to use when I have to store millions of entries in a hash table etc. (need a small runtime and memory footprint).

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• Data Mappers, Models and Images

  - by James

  Hi, I've seen and read plenty of blog posts and forum topics talking about and giving examples of Data Mapper / Model implementations in PHP, but I've not seen any that also deal with saving files/images. I'm currently working on a Zend Framework based project and I'm doing some image manipulation in the model (which is being passed a file path), and then I'm leaving it to the mapper to save that file to the appropriate location - is this common practise? But then, how do you deal with creating say 3 different size images from the one passed in? At the moment I have a "setImage($path_to_tmp_name)" which checks the image type, resizes and then saves back to the original filename. A call to "getImagePath()" then returns the current file path which the data mapper can use and then change with a call to "setImagePath($path)" once it's saved it to the appropriate location, say "/content/my_images". Does this sound practical to you? Also, how would you deal with getting the URL to that image? Do you see that as being something that the model should be providing? It seems to me like that model should worry about where the images are being stored or ultimately how they're accessed through a browser and so I'm inclined to put that in the ini file and just pass the URL prefix to the view through the controller. Does that sound reasonable? I'm using GD for image manipulation - not that that's of any relevance. UPDATE: I've been wondering if the image resizing should be done in the model at all. The model could require that it's provided a "main" image and a "thumb" image, both of certain dimensions. I've thought about creating a "getImageSpecs()" function in the model that would return something that defines the required sizes, then a separate image manipulation class could carry out the resizing and (perhaps in the controller?) and just pass the final paths in to the model using something like "setImagePaths($images)". Any thoughts much appreciated :) James.

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