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• Best calculator software to help programmers

  - by RHaguiuda

  As a embedded systems programmer I always need to make lots of base conversions (dec to hex, hex to bin and so on...), and I must admit: Windows 7 calculator is a good calc, but too limited in my point of view. I work a lot with communications protocols and it`s common to need some base conversion in this field of knowledge. I`m looking for a calculator software (not a hardware one), to help with base conversions, but it must also support scientific calc. Can anyone help on this? Since this subject is intended to help programmers, I did not ask this in SuperUser.com. Thanks.

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• How to give dynamic file name in the appender in log4j.xml

  - by Bittu

  Hi I am using log4j.xml to log the informations. I have used log4j.xml file for creating the log files. I have given the absolute path for each log file in param tag value. eg : appender name="FA" class="org.apache.log4j.DailyRollingFileAppender" param name="DatePattern" value="'_'yyyyMMdd"/ param name="File" value="D:/logFiles/GPreprocessor.log"/ layout class="com.dnb.genericpreprocessor.common.log.AppXMLLayout"/ /appender I do not want to give "GPreprocessor.log" directly.Actually that file name is dynamic based on my project. However the location will always remain same as "D:/logFiles/" . Please help me in this as this is very urgent and important for me.

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• make website page get news articles from feeds

  - by Andy

  Hi, I would like to start publishing some news articles from time to time. An option would be to create a new web page for every article but this sounds like it can be done easier. For instance I noticed clear channel uses some kind of feed, like: http://www.z100.com/cc-common/news/sections/newsarticle.html?feed=104650&article=7011404 I don't know what it means and how it works but looks like a nice way to get the article from some kind of database I guess? Does someone knows how this works, or some other way to create new articles etc, some dynamical functionality for instance to generate links to the articles and get the right article from a database for example. thanks!

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• Using HTTP status codes to reflect success/failure of Web service request?

  - by jgarbers

  I'm implementing a Web service that returns a JSON-encoded payload. If the service call fails -- say, due to invalid parameters -- a JSON-encoded error is returned. I'm unsure, however, what HTTP status code should be returned in that situation. On one hand, it seems like HTTP status codes are for HTTP: even though an application error is being returned, the HTTP transfer itself was successful, suggesting a 200 OK response. On the other hand, a RESTful approach would seem to suggest that if the caller is attempting to post to a resource, and the JSON parameters of the request are invalid somehow, that a 400 Bad Request is appropriate. I'm using Prototype on the client side, which has a nice mechanism for automatically dispatching to different callbacks based on HTTP status code (onSuccess and onFailure), so I'm tempted to use status codes to indicate service success or failure, but I'd be interested to hear if anyone has opinions or experience with common practice in this matter. Thanks!

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• Are all languages used within .net Equally performant?

  - by WeNeedAnswers

  I know the "Sales pitch" answer is yes to this question, but is it technically true. The Common Language Runtime (CLR) is designed as an intermediate language based on Imperative Programming (IP), but this has obvious implications when dealing with Declarative Programming (DP). So how efficient is a language based on a different paradigm than the Imperative Style when implemented in the CLR? I also get the feeling that the step to DP would incur an extra level of abstraction that might not model at all performant, would this be a fair comment? I have done some simple tests using F# and it all looks great, but am I missing something if the programs get more complex?

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• Registry corrupted for testing?

  - by Emile

  Hi. Forgive my ignorance. I'm a lowly LAMP stack developer and this is my first post for "c++". We had an Internet Explorer add-on commissioned but then lost support. Allegedly each version has to be have been tested "on a fresh computer since old add-ons could have cause registry errors." I'm not familiar with IE add-on development (or c++ dev). Is this common? Can't one simply reverse registry errors? How to continue testing iterations on one machine? Thanks!

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• Sharing view logic in Django

  - by Jeremy B.

  I've begun diving into Django again and I'm having trouble finding the parallel to some common concepts from my life in C#. While using .NET MVC I very often find myself creating a base controller which will provide a base action implementation to take care of the type of stuff I want to do on every request, like retrieving user information, getting localization values. Where I'm finding myself confused is how to do this in Django. I am getting more familiar with the MVT concept but I can't seem to find how to solve this scenario. I've looked at class based views and the generic views yet they didn't seem to work how I expected. What am I missing? How can i create default logic that each view will be instructed to run but not have to write it in each view method?

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• ESS/AucTeX/Sweave integration

  - by aL3xa

  I'm using GNU/Linux distro (Arch, if that's relevant), Emacs v23.2.1, ESS v5.9 and AucTeX v11.86. I want to setup AucTeX to recognize .Rnw files, so I can run LaTeX on .Rnw files with C-c C-c and get .dvi file automatically. I reckon it's quite manageable by editing .emacs file, but I still haven't got a firm grasp on Elisp. Yet another problem is quite annoying - somehow, LaTeX is not recognizing \usepackage{Sweave} in preambule, so I actually need to copy Sweave.sty file (in my case located in /usr/share/R/texmf/Sweave.sty) to directory where .Rnw file is located (and I'm getting more frustrated with the fact that this is common bug on Windows platforms!) My question boils down to two problems: how to make LaTeX recognize \usepackage{Sweave} (without copying Sweave.sty to "home" folder each time) how to setup AucTeX to compile .Rnw files to .dvi

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• How do I set my development web browser in VS2010?

  - by blesh

  I don't like to use IE for my system default web browser. but I do want to set IE as my browser in VS2010 because it works a little nicer for debugging and I like to develop to the lowest common denominator. (jab, lol)... anyhow, can I default to debugging against IE? I know in VS2008 you just had to "Browse With..." on an .aspx page. But that option doesn't exist in VS2010 RC. What gives?

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• Custom Grails Environments?

  - by tinny

  I have been developing several Grails applications over the past couple of years. I am increasingly finding that the three grails environments (dev, test, prod) aren't enough to satisfy my needs. The more "enterprisey" your application gets, the more environments you tend to have. I tend to use 6 environments for my development cycle... DEVA //My dev DEVB //Team mates dev CI_TEST //CI like Hudson QA_TEST //Testing team environment UAT_TEST //Customers testing environment PROD //Production Im wondering if there is a way to define custom Grails environments? I dont think there is, but the feature could be handy. The way I am getting around this right now is by externalising the config to a properties file. Id imagine that this is a pretty common requirement, so how have you been dealing with your environments?

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• PDO::ATTR_EMULATE_PREPARES => false

  - by user264058

  I'm new to php and PDO ,so i read this response to a similar post- Does PDO really not use prepared statements with mysql? Yes, by default (at least with version I tested) but native mode can be turned on manually. If not, can it be forced to do so By employing PDO::ATTR_EMULATE_PREPARES setting, the name is pretty self-explanatory. $dbh-setAttribute( PDO::ATTR_EMULATE_PREPARES, false ); should you do that? That's hardest question of them all. Well, I'd say - yes, you should. If you choose PDO as your db driver, there is no point in using it in the emulation mode. by YOUR COMMON SENSE Aren't prepared statements secure from SQL injection, why change if from 'true'-false?? what is native mode??

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• PHP anonymous functions scope question

  - by Dan

  Hi, I'm trying to sort an array of objects by a common property, however I cannot get my $property parameter to register in the inner function (I can use it in the outer one OK). The way I read the documentation, it sounded like the parameter would be available, have I misunderstood something? Here is what I have: public static function sortObjectsByProperty($objects, $property) { function compare_object($a, $b) { $a = $a->$property; $b = $b->$property; if ($a->$property == $b->$property) { return 0; } return ($a->$property > $b->$property) ? +1 : -1; } usort($objects, 'compare_object'); return $objects; } Any advice appreciated. Thanks.

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• IStatelessSession insert object with many-to-one

  - by Andrew Kalashnikov

  Hello guys. I've got common mapping <class name="NotSyncPrice, Portal.Core" table='Not_sync_price'> <id name="Id" unsaved-value="0"> <column name="id" not-null="true"/> <generator class="native"/> </id> <many-to-one name="City" class="Clients.Core.Domains.City, Clients.Core" column="city_id" cascade="none"></many-to-one> <!--<property name="City"> <column name="city_id"/> </property>--> I want to use IStatelessSession for batch insert. But when i set city object to NotSyncPrice object and call IStatelessSession I've got strange exception: NHibernate.Impl.StatelessSessionImpl.get_Timestamp() When its null or int all is ok. I try use real && proxy city object. But no result. What's wrong:( Please help

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• Unknow Linking Error

  - by Nathan Campos

  I'm developing my own OS, but for this I need to touch on linking, then I've done this linking script to build it: ENTRY (loader) SECTIONS{ . = 0x00100000 .text : { *(.text) } .bss : { sbss = .; *(COMMON) *(.bss) ebss = .; } } .data ALIGN (0x1000) : { start_ctors = .; *(.ctor*) end_ctors = .; start_dtors = .; *(.dtor*) end_dtors = .; *(.data) } But when I try to link the things, I got some errors $ ld -T linker.ld -o kernel.bin loader.o kernel.o ld:linker.ld:5: syntax error $ What can I do?

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• Using Inch or cm/mm from metric system for americans and canadians?

  - by gamma

  We're developing an international product that displays a ruler to the user. Now in Germany and many other countries its of course common to use the metric system: cm or mm. I'm aware that americans and canadians (and maybe others too) do still use inches, feet and yards. So the question is: will todays americans (and other inch-country-citizens) understand the metric system and take it for granted - or do they still love their inches so much that they'd rather die than use a product with incorrect measurements? ( sorry for being blunt ;) )

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• cURL PHP Proper SSL between private servers with self-signed certificate

  - by PolishHurricane

  I originally had a connection between my 2 servers running with CURLOPT_SSL_VERIFYPEER set to "false" with no Common Name in the SSL cert to avoid errors. The following is the client code that connected to the server with the certificate: curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,FALSE); curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2); However, I recently changed this code (set it to true) and specified the computers certificate in PEM format. curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,TRUE); curl_setopt($ch,CURLOPT_SSL_VERIFYHOST,2); curl_setopt($ch,CURLOPT_CAINFO,getcwd().'/includes/hostcert/Hostname.crt'); This worked great on the local network from a test machine, as the certificate is signed with it's hostname for a CN. How can I setup the PHP code so it only trusts the hostname computer and maintains a secure connection. I'm well aware you can just set CURLOPT_SSL_VERIFYHOST to "0" or "1" and CURLOPT_SSL_VERIFYPEER to "false", but these are not valid solutions as they break the SSL security.

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• HTML, CSS, Javascript - Problem with hiding/showing elements

  - by Edward Wong Hau Pepelu Tivrusk

  I'm using the Blueprint CSS grid for my HTML page. I have a table which I want to show/hide - linking it to a button, using jQuery. The problem is that everytime I click on the button to show/hide the table, everything on the page shifts slightly left-right. Is this a common problem? Does anyone know what could be causing this and what I could do to fix the other elements of the page such that they do not move? Edit: grammar.

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• Helper functions & prototype methods to replace heavy frameworks?

  - by Rob

  All frameworks aside, what are some of the common helper functions/prototype methods you use on a daily basis? Please note I am not arguing against frameworks. I've simply found that the majority of what I do on a daily basis can, most often, be done with a few dozen Array, String and Element.prototype methods. With the addition of a few helper functions like $ (getElementsById) and $$$ (getElementsByClass), I am able to satisfy some of the core benefits, however basic, of a much heavier framework. If you were to collect a small library of basic methods and functions to replace the core functionality of some of the popular frameworks, what would they be?

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• Exposing headers on iPhone static library

  - by leolobato

  Hello guys, I've followed this tutorial for setting up a static library with common classes from 3 projects we are working on. It's pretty simple, create a new static library project on xcode, add the code there, a change some headers role from project to public. The tutorial says I should add my library folder to the header search paths recursively. Is this the right way to go? I mean, on my library project, I have files separated in folders like Global/, InfoScreen/, Additions/. I was trying to setup one LOKit.h file on the root folder, and inside that file #import everything I need to expose. So on my host project I don't need to add the folder recursively to the header search path, and would just #import "LOKit.h". But I couldn't get this to work, the host project won't build complaining about all the classes I didn't add to LOKit.h, even though the library project builds. So, my question is, what is the right way of exposing header files when I setup a Cocoa Touch Static Library project on xCode?

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• fill dropdown list by querystring

  - by KareemSaad

  I Had Drop down list and I want to fill it with data from database through stored procedure and it had it,s value when specific query string I had two query string. as private void LoadWithCategory() { if (Request.QueryString["Category_Id"] != null) { using (SqlConnection Con = Connection.GetConnection()) { SqlCommand Com = new SqlCommand("GetProducFamilyTP", Con); Com.CommandType = CommandType.StoredProcedure; Com.Parameters.Add(Parameter.NewInt("@Category_Id", Request.QueryString["Category_Id"])); SqlDataReader DR = Com.ExecuteReader(); if (DR.Read()) { DDLProductFamily.DataSource = DR; DDLProductFamily.DataTextField = DR["Name"].ToString(); DDLProductFamily.DataValueField = DR["ProductCategory_Id"].ToString(); DDLProductFamily.DataBind(); } DR.Close(); } } } ALTER Proc GetProducFamilyTP ( @Category_Id Int ) AS Select Distinct Categories.Category_Id ,ProductCategory.Name , ProductCategory.ProductCategory_Id From Category_ProductCategory Inner Join Categories On Category_ProductCategory.Category_Id=Categories.Category_Id Inner Join ProductCategory On Category_ProductCategory.ProductCategory_Id=ProductCategory.ProductCategory_Id Where Categories.Category_Id =@Category_Id but this error occurred DataBinding: 'System.Data.Common.DataRecordInternal' does not contain a property with the name '4Door'.

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• How can I create a new email account in Java?

  - by Jeremy Goodell

  I am able to send and receive emails from my JSPs and associated Java code using the Java Mail API (javax.mail.*). Now I would like to create a new POP3 email account programmatically when a user registers for my site. I've found surprisingly little information about this with web searches. I would think it would be a somewhat common problem. It appears that the Java Mail API does not provide any assistance in this area. I have many email accounts available under my godaddy account, and to manually create an account, I just go to the godaddy email control panel, click Add, and specify the email address and password. This is exactly what I would like to do via a Java program. Any ideas?

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• What's the best way to handle web.config file versions in ASP.Net?

  - by MusiGenesis

  I have an ASP.Net web site (ASPX and ASMX pages) with a single web.config file. We have a development version and a production version. Over time, the web.config files for development and production have diverged substantially. What is the best practice for keeping both versions of web.config in source control (we use Tortoise SVN but I don't think that matters)? It seems like I could add the production web.config file with a name like "web.config.prod", and then when we turnover all the files we would just add the step of deleting the existing web.config and renaming web.config.prod to web.config. This seems hackish, although I'm sure it would work. Is there not some mechanism for dealing with this built in to Visual Studio? It seems like this would be a common issue, but I haven't found any questions (with answers) about this.

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• How does a programmer think?

  - by Gordon Potter

  This may be a hopelessly vague question. But I am interested to hear whatever logical thought processes people go through when learning a new concept or trying to get their brain around code they might not have ever seen before. Basically, what general steps does one take to to break down problems and what does it take to "get it"? If you were to diagram a flowchart of how your mental process works when you look at code or try to solve a problem what might it look like? What common references, tips, and mental assumptions do you find useful in problem solving? How is this different between different domains? For example in what ways is a web programmer's thought process similar or different from a traditional desktop app developer's process?

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• Shall i learn Assembly Language or C, to Understand how "real programming" works?

  - by Daniel Upton

  Hello, World.. I'm a web developer mostly working in Ruby and C#.. I wanna learn a low level language so i dont look like an ass infront of my (computer science expert) boss. Ive heard a lot of purist buzz about how assembly language is the only way to learn how computers actually work, but on the other hand C would probably be more useful as a language rather than just for theory. So my question is.. Would Learning C teach me enough computer science theory / low level programming to not look like a common dandy (complete tool)? Thanks! Daniel

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• ASP.NET MVC UpdateModel - fields vs properties??

  - by mrjoltcola

  I refactored some common properties into a base class and immediately my model updates started failing. UpdateModel() and TryUpdateModel() did not seem to update inherited public properties. I cannot find detailed info on MSDN nor Google as to the rules or semantics of these methods. The docs are terse (http://msdn.microsoft.com/en-us/library/dd470933.aspx), simply stating: Updates the specified model instance using values from the controller's current value provider. SOLVED: MVC.NET does indeed handle inherited properties just fine. This turned out to have nothing to do with inheritance. My base class was implemented with public fields, not properties. Switching them to formal properties (adding {get; set; }) was all I needed. This has bitten me before, I keep wanting to use simple, public fields. I would argue that fields and properties are syntactically identical, and could be argued to be semantically equivalent, for the user of the class.

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