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• Ord function implementation in Delphi

  - by Federico Zancan

  Purely as an exercise at home, aimed to better understand some language basics, I tried to reimplement the Ord function, but I came across a problem. In fact, the existing Ord function can accept arguments of a variety of different types (AnsiChar, Char, WideChar, Enumeration, Integer, Int64) and can return Integer or Int64. I can't figure out how to declare multiple versions of the same function. How should this be coded in Delphi?

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• Has any hobbyist attempted to make a simple VGA-graphics based operating system in machine code?

  - by Bigyellow Bastion

  I mean real bare bones, bare machine here(no Linux kernel, pre-existing kernel, or any bootloader). I mean honestly write the bootloading software in direct microarchitecture-specific machine opcode, host the operating system, interrupts, I/O, services, and graphical software and all hardware interaction, computation, and design entirely in binary. I know this is quite the leap here, but I was thinking to practice first in x86 assembly (not binary) 16-bit style. Any ideas?

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• Web interface with FastCGI or with direct HTTP?

  - by Basile Starynkevitch

  Let's assume I want (for fun at start) to play with some new DSL (domain specific language) idea. And I really want its user[s] (probably only me at first) to interact thru a web interface. I'll probably implement it in C++ (probably using LLVM). Should I use an HTTP server library (like libonion or microhttpd) to talk directly HTTP or should I use FastCGI? In particular, I am noticing that several recent web frameworks (Opa, Ocsigen, ...) do not have any FastCGI interface but only HTTP one.... So my feeling is that FastCGI is really out of fashion.... Any opinions on that? Do you know recently started project using FastCGI ? (and what about SCGI?)

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• Best practice while marking a bug as resolved with Bugzilla (versioning of product and components)

  - by Vincent B.

  I am wondering what is the best way to handle the situation of marking a bug as resolved and providing a version of component/product in which this fix can be found. Context For a project I am working on, we are using Bugzilla for issue tracking, and we have the following: A product "A" with a version number like vA.B.C.D, This product "A" have the following components: Component "C1" with a version number like vA.B.C.D, Component "C2" with a version number like vA.B.C.D, Component "C3" with a version number like vA.B.C.D. Internally we keep track of which component versions have been used to generate the product A version vA.B.C.D. Example: Product "A" version v1.0.0.0 has been produced from component "C1" v1.0.0.3, component "C2" v1.3.0.0 and component "C3" v2.1.3.5. And Product "A" version v1.0.1.0 has been produced from component "C1" v1.0.0.4, component "C2" v1.3.0.0 and component "C3" v2.1.3.5. Each component is a SVN repository. The person in charge of generating the product "A" have only access to the different components tags folder in SVN, and not the trunk of each component repository. Problem Now the problem is the following, when a bug is found in the product "A", and that the bug is related to Component "C1", the version of product "A" is chosen (e.g. v1.0.0.0), and this version allow the developer to know which version of component "C1" has the bug (here it will be v1.0.0.3). A bug report is created. Now let's say that the developer responsible for component "C1" corrects the bug, then when the bug seems to be fixed and after some test and validation, the developer generates a new tag for component "C1", with the version v1.0.0.4. At this time, the developer of component "C1" needs to update the bug report, but what is the best to do: Mark the bug as resolved/fixed and add a comment saying "This bug has been fixed in the tags v1.0.0.4 of C1 component" ? Keep the bug as assigned, add a comment saying "This bug has been fixed in the tags v1.0.0.4 of C1 component, update this bug status to resolved for the next version of the product that will be generated with the newest version (v1.0.0.4 of C1)" ? Another possible way to deal with this problem. Right now the problem is that when a product component CX is fixed, it is not sure in which future version of the product A it will be included, so it is for me not possible to say in which version of the product it will be solved, but it is possible to say in which version of the Component CX it has been solved. So when do we need to mark a bug as solved, when the product A version include the fixed version of CX, or only when CX component has been fixed ? Thanks for your personal feedback and ideas about this !

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• Efficient Trie implementation for unicode strings

  - by U Mad

  I have been looking for an efficient String trie implementation. Mostly I have found code like this: Referential implementation in Java (per wikipedia) I dislike these implementations for mostly two reasons: They support only 256 ASCII characters. I need to cover things like cyrillic. They are extremely memory inefficient. Each node contains an array of 256 references, which is 4096 bytes on a 64 bit machine in Java. Each of these nodes can have up to 256 subnodes with 4096 bytes of references each. So a full Trie for every ASCII 2 character string would require a bit over 1MB. Three character strings? 256MB just for arrays in nodes. And so on. Of course I don't intend to have all of 16 million three character strings in my Trie, so a lot of space is just wasted. Most of these arrays are just null references as their capacity far exceeds the actual number of inserted keys. And if I add unicode, the arrays get even larger (char has 64k values instead of 256 in Java). Is there any hope of making an efficient trie for strings? I have considered a couple of improvements over these types of implementations: Instead of using array of references, I could use an array of primitive integer type, which indexes into an array of references to nodes whose size is close to the number of actual nodes. I could break strings into 4 bit parts which would allow for node arrays of size 16 at the cost of a deeper tree.

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• Performance of concurrent software on multicore processors

  - by Giorgio

  Recently I have often read that, since the trend is to build processors with multiple cores, it will be increasingly important to have programming languages that support concurrent programming in order to better exploit the parallelism offered by these processors. In this respect, certain programming paradigms or models are considered well-suited for writing robust concurrent software: Functional programming languages, e.g. Haskell, Scala, etc. The actor model: Erlang, but also available for Scala / Java (Akka), C++ (Theron, Casablanca, ...), and other programming languages. My questions: What is the state of the art regarding the development of concurrent applications (e.g. using multi-threading) using the above languages / models? Is this area still being explored or are there well-established practices already? Will it be more complex to program applications with a higher level of concurrency, or is it just a matter of learning new paradigms and practices? How does the performance of highly concurrent software compare to the performance of more traditional software when executed on multiple core processors? For example, has anyone implemented a desktop application using C++ / Theron, or Java / Akka? Was there a boost in performance on a multiple core processor due to higher parallelism?

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• Are Java certifications important for an architect role?

  - by Tahir Akram

  My this question is career path related. I want to know how much Java Certifications (SCJP, SCWCD and others) are important for an architect position. If a person posses a good experience in Java development and want to pursue his career on architect level, do you guys think he need to have certification on his CV. If he has never worked on lead developer roles? If you conducting my interview for an architect position. And I have worked as a Java web developer in different teams having 5 years of exp. Never lead any. And I am having certification badges on my CV. How can a developer make his career path towards being an architect in a team?

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• Nested languages code smell

  - by l0b0

  Many projects combine languages, for example on the web with the ubiquitous SQL + server-side language + markup du jour + JavaScript + CSS mix (often in a single function). Bash and other shell code is mixed with Perl and Python on the server side, evaled and sometimes even passed through sed before execution. Many languages support runtime execution of arbitrary code strings, and in some it seems to be fairly common practice. In addition to advice about security and separation of concerns, what other issues are there with this type of programming, what can be done to minimize it, and is it ever defensible (except in the "PHB on the shoulder" situation)?

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• Parsing stdout with custom format or standard format?

  - by linquize

  To integrate with other executables, a executable may launch another executable and capture its output from stdout. But most programs writes the output message to stdout in custom format and usually in human readable format. So it requires the system integrator to write a function to parse the output, which is considered trouble and the parser code may be buggy. Do you think this is old fashioned? Most Unix-style programs do that. Very few programs write to stdout in standard format such as XML or JSON, which is more modern. Example: Veracity (DVCS) writes JSON to stdout. Should we switch to use modern formats? For a console program, human readable or easy parsable: which is more important ?

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• How to manage security of these self hosted web apis, to ensure that the request coming for accessing data is authenticated?

  - by Husrat Mehmood

  Let's pretend I am going to work on an enterprise application. Say I have 11 modules in the application and I would have to develop Dashboards for every role in the organization for whom I are going to develop application. We Decided to use Asp.Net Web Api and return json data from our apis. We are going to include 11 Self hosted web apis projects in our application (one self hosted web api) for every module. All 11 modules are connected to one Sql server 2012 Database. Then once api is ready we would have to create Business Dashboards (Based upon roles in Organization). So Now my web api client is Asp.Net Mvc application.Asp.Net mvc will consume those web apis. Here is the part for whom all explanation is done. How should I manage Security of all 11 self hosted web apis? How should I only authenticated request is coming? If I authenticate user by login and password and then redirect user to appropriate Dashboard designed for the role that user have and load data by consuming web apis. How should I ensure that the request coming for accessing data is authenticated?

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• Finding a way to simplify complex queries on legacy application

  - by glenatron

  I am working with an existing application built on Rails 3.1/MySql with much of the work taking place in a JavaScript interface, although the actual platforms are not tremendously relevant here, except in that they give context. The application is powerful, handles a reasonable amount of data and works well. As the number of customers using it and the complexity of the projects they create increases, however, we are starting to run into a few performance problems. As far as I can tell, the source of these problems is that the data represents a tree and it is very hard for ActiveRecord to deterministically know what data it should be retrieving. My model has many relationships like this: Project has_many Nodes has_many GlobalConditions Node has_one Parent has_many Nodes has_many WeightingFactors through NodeFactors has_many Tags through NodeTags GlobalCondition has_many Nodes ( referenced by Id, rather than replicating tree ) WeightingFactor has_many Nodes through NodeFactors Tag has_many Nodes through NodeTags The whole system has something in the region of thirty types which optionally hang off one or many nodes in the tree. My question is: What can I do to retrieve and construct this data faster? Having worked a lot with .Net, if I was in a similar situation there, I would look at building up a Stored Procedure to pull everything out of the database in one go but I would prefer to keep my logic in the application and from what I can tell it would be hard to take the queried data and build ActiveRecord objects from it without losing their integrity, which would cause more problems than it solves. It has also occurred to me that I could bunch the data up and send some of it across asynchronously, which would not improve performance but would improve the user perception of performance. However if sections of the data appeared after page load that could also be quite confusing. I am wondering whether it would be a useful strategy to make everything aware of it's parent project, so that one could pull all the records for that project and then build up the relationships later, but given the ubiquity of complex trees in day to day programming life I wouldn't be surprised if there were some better design patterns or standard approaches to this type of situation that I am not well versed in.

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• Pirate Problem In Interview Question

  - by Hafiz

  Some one asked me this question in an interview, so I want to know that what can be technical or algorithmic or strategical solution can we provide? If I am a leader of Pirates who looted 100kg gold, now every pirate has 1 bullet in gun and every pirate wants to get each other's share. They are 5 in number including me. So what strategy I will use to get to kill others while being safe or is there way to decrease probability?

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• Why is testing MVC Views frowned upon?

  - by Peter Bernier

  I'm currently setting the groundwork for an ASP.Net MVC application and I'm looking into what sort of unit-tests I should be prepared to write. I've seen in multiple places people essentially saying 'don't bother testing your views, there's no logic and it's trivial and will be covered by an integration test'. I don't understand how this has become the accepted wisdom. Integration tests serve an entirely different purpose than unit tests. If I break something, I don't want to know a half-hour later when my integration tests break, I want to know immediately. Sample Scenario : Lets say we're dealing with a standard CRUD app with a Customer entity. The customer has a name and an address. At each level of testing, I want to verify that the Customer retrieval logic gets both the name and the address properly. To unit-test the repository, I write an integration test to hit the database. To unit-test the business rules, I mock out the repository, feed the business rules appropriate data, and verify my expected results are returned. What I'd like to do : To unit-test the UI, I mock out the business rules, setup my expected customer instance, render the view, and verify that the view contains the appropriate values for the instance I specified. What I'm stuck doing : To unit-test the repository, I write an integration test, setup an appropriate login, create the required data in the database, open a browser, navigate to the customer, and verify the resulting page contains the appropriate values for the instance I specified. I realize that there is overlap between the two scenarios discussed above, but the key difference it time and effort required to setup and execute the tests. If I (or another dev) removes the address field from the view, I don't want to wait for the integration test to discover this. I want is discovered and flagged in a unit-test that gets multiple times daily. I get the feeling that I'm just not grasping some key concept. Can someone explain why wanting immediate test feedback on the validity of an MVC view is a bad thing? (or if not bad, then not the expected way to get said feedback)

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• Writing custom Message Formatter for SOAP basicHttpBinding

  - by Lijo

  I have a WSDL published by our service development team. It is using SOAP and basicHttpBinding. I can add the service reference to the project using Add Service Reference option in Visual Studio. I need to develop the WCF client. I need to use custom Message Formatter (for mapping between Messages and CLR types). Can you please show how to write the custom Message Formatter (in C# )for the following wsdl? Note: I am planning to use custom Message Formatter due to an issue mentioned in http://stackoverflow.com/questions/12316884/header-namespace-mismatch-issue WSDL <definitions xmlns:import0="urn:thinktecture-com:demos:restaurantservice:data:v1" xmlns:import2="urn:thinktecture-com:demos:restaurantservice:messages:v1" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:import1="urn:thinktecture-com:demos:restaurantservice:headerdata:v1" xmlns:tns="urn:thinktecture-com:demos:restaurantservice:wsdl:v1" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" name="RestauarntService" targetNamespace="urn:thinktecture-com:demos:restaurantservice:wsdl:v1" xmlns="http://schemas.xmlsoap.org/wsdl/"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <types> <xsd:schema> <xsd:import schemaLocation="RestaurantData.xsd" namespace="urn:thinktecture-com:demos:restaurantservice:data:v1" /> <xsd:import schemaLocation="RestaurantHeaderData.xsd" namespace="urn:thinktecture-com:demos:restaurantservice:headerdata:v1" /> <xsd:import schemaLocation="RestaurantMessages.xsd" namespace="urn:thinktecture-com:demos:restaurantservice:messages:v1" /> </xsd:schema> </types> <message name="getRestaurantsIn"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <part name="parameters" element="import2:getRestaurants" /> </message> <message name="getRestaurantsOut"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <part name="parameters" element="import2:getRestaurantsResponse" /> </message> <message name="lijosCustomFaultMessage"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <part name="fault" element="import2:customFault" /> </message> <message name="userCredentialsIn"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <part name="parameters" element="import1:userCredentials" /> </message> <message name="addRestaurantIn"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <part name="parameters" element="import2:addRestaurant" /> </message> <message name="addRestaurantInHeader1"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <part name="parameters" element="import1:userCredentials" /> </message> <message name="customFaultIn"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <part name="parameters" element="import2:customFault" /> </message> <portType name="RestauarntServiceInterface"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <operation name="getRestaurants"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <input message="tns:getRestaurantsIn" /> <output message="tns:getRestaurantsOut" /> <fault name="lijosCustomFaultMessage" message="tns:lijosCustomFaultMessage" /> </operation> <operation name="userCredentials"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <input message="tns:userCredentialsIn" /> </operation> <operation name="addRestaurant"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <input message="tns:addRestaurantIn" /> </operation> <operation name="customFault"> <wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" /> <input message="tns:customFaultIn" /> </operation> </portType> <binding name="BasicHttpBinding_RestauarntServiceInterface" type="tns:RestauarntServiceInterface"> <soap:binding transport="http://schemas.xmlsoap.org/soap/http" /> <operation name="getRestaurants"> <soap:operation soapAction="urn:thinktecture-com:demos:restaurantservice:wsdl:v1:getRestaurantsIn" style="document" /> <input> <soap:body use="literal" /> </input> <output> <soap:body use="literal" /> </output> <fault name="lijosCustomFaultMessage"> <soap:fault use="literal" name="lijosCustomFaultMessage" namespace="" /> </fault> </operation> <operation name="userCredentials"> <soap:operation soapAction="urn:thinktecture-com:demos:restaurantservice:wsdl:v1:userCredentialsIn" style="document" /> <input> <soap:body use="literal" /> </input> </operation> <operation name="addRestaurant"> <soap:operation soapAction="urn:thinktecture-com:demos:restaurantservice:wsdl:v1:addRestaurantIn" style="document" /> <input> <soap:body use="literal" /> <soap:header message="tns:addRestaurantInHeader1" part="parameters" use="literal" /> </input> </operation> <operation name="customFault"> <soap:operation soapAction="urn:thinktecture-com:demos:restaurantservice:wsdl:v1:customFaultIn" style="document" /> <input> <soap:body use="literal" /> </input> </operation> </binding> <service name="RestauarntServicePort"> <port name="RestauarntServicePort" binding="tns:BasicHttpBinding_RestauarntServiceInterface"> <soap:address location="http://localhost/RestauarntService" /> </port> </service> </definitions>?? RestaurantData.xsd <?xml version="1.0" encoding="utf-8" ?> <xs:schema id="RestaurantData" targetNamespace="urn:thinktecture-com:demos:restaurantservice:data:v1" elementFormDefault="qualified" xmlns="urn:thinktecture-com:demos:restaurantservice:data:v1" xmlns:mstns="urn:thinktecture-com:demos:restaurantservice:data:v1" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:complexType name="restaurantInfo"> <xs:sequence> <xs:element name="restaurantID" type="xs:int" /> <xs:element name="name" type="xs:string" /> <xs:element name="address" type="xs:string" /> <xs:element name="city" type="xs:string" /> <xs:element name="state" type="xs:string" /> <xs:element name="zip" type="xs:string" /> <xs:element name="openFrom" type="xs:time" /> <xs:element name="openTo" type="xs:time" /> </xs:sequence> </xs:complexType> <xs:complexType name="restaurantsList"> <xs:sequence> <xs:element name="restaurant" type="restaurantInfo" maxOccurs="unbounded" minOccurs="0" /> </xs:sequence> </xs:complexType> <xs:complexType name="customFault"> <xs:sequence> <xs:element name="errorCode" type="xs:string"/> <xs:element name="message" type="xs:string"/> <xs:element maxOccurs="unbounded" minOccurs="0" name="messages" type="xs:string" /> </xs:sequence> </xs:complexType> </xs:schema> RestaurantHeaderData.xsd <?xml version="1.0" encoding="utf-8" ?> <xs:schema id="RestaurantHeaderData" targetNamespace="urn:thinktecture-com:demos:restaurantservice:headerdata:v1" elementFormDefault="qualified" xmlns="urn:thinktecture-com:demos:restaurantservice:headerdata:v1" xmlns:mstns="urn:thinktecture-com:demos:restaurantservice:headerdata:v1" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:complexType name="credentials"> <xs:sequence> <xs:element name="username" type="xs:string" /> <xs:element name="password" type="xs:string" /> </xs:sequence> </xs:complexType> <xs:element name="userCredentials" type="credentials"> </xs:element> </xs:schema> ? RestaurantMessages.xsd <?xml version="1.0" encoding="utf-8" ?> <xs:schema id="RestaurantMessages" targetNamespace="urn:thinktecture-com:demos:restaurantservice:messages:v1" elementFormDefault="qualified" xmlns="urn:thinktecture-com:demos:restaurantservice:messages:v1" xmlns:mstns="urn:thinktecture-com:demos:restaurantservice:messages:v1" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:import="urn:thinktecture-com:demos:restaurantservice:data:v1"> <xs:import id="RestaurantData" schemaLocation="RestaurantData.xsd" namespace="urn:thinktecture-com:demos:restaurantservice:data:v1"> </xs:import> <xs:element name="getRestaurants"> <xs:complexType> <xs:sequence> <xs:element name="zip" type="xs:string" /> </xs:sequence> </xs:complexType> </xs:element> <xs:element name="getRestaurantsResponse"> <xs:complexType> <xs:sequence> <xs:element name="restaurants" type="import:restaurantsList" /> </xs:sequence> </xs:complexType> </xs:element> <xs:element name="addRestaurant"> <xs:complexType> <xs:sequence> <xs:element name="restaurant" type="import:restaurantInfo" /> </xs:sequence> </xs:complexType> </xs:element> <xs:element name="customFault" type="import:customFault" /> </xs:schema>

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• Is 'Protection' an acceptable Java class name

  - by jonny

  This comes from a closed thread at stack overflow, where there are already some useful answers, though a commenter suggested I post here. I hope this is ok! I'm trying my best to write good readable, code, but often have doubts in my work! I'm creating some code to check the status of some protected software, and have created a class which has methods to check whether the software in use is licensed (there is a separate Licensing class). I've named the class 'Protection', which is currently accessed, via the creation of an appProtect object. The methods in the class allow to check a number of things about the application, in order to confirm that it is in fact licensed for use. Is 'Protection' an acceptable name for such a class? I read somewhere that if you have to think to long in names of methods, classes, objects etc, then perhaps you may not be coding in an Object Oriented way. I've spent a lot of time thinking about this before making this post, which has lead me to doubt the suitability of the name! In creating (and proof reading) this post, I'm starting to seriously doubt my work so far. I'm also thinking I should probably rename the object to applicationProtection rather than appProtect (though am open to any comments on this too?). I'm posting non the less, in the hope that I'll learn something from others views/opinions, even if they're simply confirming I've "done it wrong"!

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• Where is a good place to start to learn about custom caching in .Net

  - by John

  I'm looking to make some performance enhancements to our site, but I'm not sure exactly where to begin. We have some custom object caching, but I think that we can do better. Our Business We aggregate news stories on a news type of web site. We get approximately 500-1000 new stories per week. We have index pages that show various lists of the items and details pages that show the individual stories. Our Current Use case: Getting an Individual Story User makes a request The Data Access Layer(DAL) checks to see if the item is in cache and if item is fresh (15 minutes). If the item is not in cache or is not fresh, retrieve the item from SQL Server, save to cache and return to user. Problems with this approach The pull nature of caching means that users have to pay the waiting cost every time that the cache is refreshed. Once a story is published, it changes infrequently and I think that we should replace the pull model with something better. My initial thoughts My initial thought is that stories should ALL be stored locally in some type of dictionary. (Cache or is there another, better way?). If the story is not found, then make a trip to the database, update the local dictionary and send the item back. Since there may be occasional updates to stories, this should be an entirely process from the user. I watched a video by Brent Ozar, How StackOverflow Scales SQL Server, in which Brent states "the fastest database query is the one that you don't make". Where do I start? At this point, I don't know exactly what the solution is. Is it caching? Is there a better way of using local storage? Do I use a Dictionary, OrderedDictionary, List ? It seems daunting and I'm just looking for some good starting points to learn more about how to do this type of optimization.

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• Importance of a 1st Class Degree

  - by Nipuna Silva

  I'm currently at the 3rd year following a degree in Software Engineering. I'm thinking of moving into a research field in the future (programming language design, AI etc.) My problems are, What is the advantage/importance of carrying a 1st Class Degree (Honors for Americans) in to the industry rather than with just simple pass. Is it really important to have a 1st Class? Is it the practical knowledge i have to give priority or the theoretical knowledge, or both?

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• Where to find a mentor?

  - by Fanatic23

  I have been looking around for resources that discuss about mentors, including questions in the stackexchange network. I see that the general response has been to join open source projects and/or check out local user groups if there exists any. Are we sure that joining open source project can get me a mentor? It can grab eyeballs, yes, if the project is exciting enough but a mentor? I am not so sure. What do you guys think? Finally, I'd want my mentor to be in a specific domain as opposed to just being a coding wizard and that makes the search even more difficult. Suggestions?

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• Node.js Or servlets?

  - by Nilesh

  I have heard a lot and read about the Javascript server side language i.e Node.js, and saw many comparisons in favor of Node. I don't understand what makes it better or faster, or how it even relates to something as mature as Java Servlets. But Servlets are built on top of a multithreaded programming language as opposed to Node.js. Then how can node.js be faster? If suppose 1000K users query for a database records, then shouldn't Node.js be slower than Servlets. Also Don't servlets have better security compared to Node.js?

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• When to do Code Review

  - by mcass20

  We have recently moved to a scrum process and are working on tasks and user stories inside of sprints. We would like to do code reviews frequently to make them less daunting. We are thinking that doing them on a user story level but are unsure how to branch our code to account for this. We are using VS and TFS 2010 and we are a team of 6. We currently branch for features but are working on changing to branching for scrum. We do not currently use shelvesets and don't really want to implement if there are other techniques available. How do you recommend we implement code review per user story?

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• Functional programming readability

  - by Jimmy Hoffa

  I'm curious about this because I recall before learning any functional languages, I thought them all horribly, awfully, terribly unreadable. Now that I know Haskell and f#, I find it takes a little longer to read less code, but that little code does far more than an equivalent amount would in an imperative language, so it feels like a net gain and I'm not extremely practiced in functional. Here's my question, I constantly hear from OOP folks that functional style is terribly unreadable. I'm curious if this is the case and I'm deluding myself, or if they took the time to learn a functional language, the whole style would no longer be more unreadable than OOP? Has anybody seen any evidence or got any anecdotes where they saw this go one way or another with frequency enough to possibly say? If writing functionally really is of lower readability than I don't want to keep using it, but I really don't know if that's the case or not..

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• design pattern for unit testing? [duplicate]

  - by Maddy.Shik

  This question already has an answer here: Unit testing best practices for a unit testing newbie 4 answers I am beginner in developing test cases, and want to follow good patterns for developing test cases rather than following some person or company's specific ideas. Some people don't make test cases and just develop the way their senior have done in their projects. I am facing lot problems like object dependencies (when want to test method which persist A object i have to first persist B object since A is child of B). Please suggest some good books or sites preferably for learning design pattern for unit test cases. Or reference to some good source code or some discussion for Dos and Donts will do wonder. So that i can avoid doing mistakes be learning from experience of others.

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• Why USA produces the best / most popular software? [closed]

  - by user1598390

  Have you noticed that a disproportionate amount of popular software products comes from the USA ? Examples: iOS, OS X, Phosothop, Oracle, Windows, Final Cut Pro, MS Office, iTunes, iWorks Suite, iLife Suite, AutoCad, Aperture, Google search engine, Twitter and endless stream of software that are the best in their fields and that are the models the rest of the industry want to emulate. Few people would deny that the most popular software comes from American companies. Obviously there's plenty of good software coming from outside the US, like Linux or SAP but most great looking, killer software comes from USA. Maybe these companies outsource the code elsewhere but the inception and design is mostly done in the USA. Why is that? and, can it be replicated elsewhere given the correct "ingredients" ?

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• Why maven so slow compared to automake?

  - by ???'Lenik

  I have a Maven project consists of around 100 modules. I have reason to decompose the project to so many modules, and I don't think I should merge them in order to speed up the build process. I have read a lot of projects by other people, e.g., the Maven project itself, and Apache Archiva, and Hudson project, they all consists of a lot of modules, nearly 100 maybe, more or less. The problem is, to build them all need so much time, 3 hours for the first time build (this is acceptable because a lot of artifacts to download), and 15 minutes for the second build (this is not acceptable). For automake, things are similarly, the first time you need to configure the project, to prepare the magical config.h file, it's far more complex then what maven does. But it's still fast, maybe 10 seconds on my Debian box. After then, make install requires maybe 10 minutes for the first time build. However, when everything get prepared, the .o object files are generated, they don't have to be rebuild at all for the second time build. (In Maven, everything rebuild at everytime.) I'm very wondering, how guys working for Maven projects can bare this long time for each build, I'm just can't sit down calmly during each time Maven build, it took too long time, really.

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• Why write clean, refactored code?

  - by Shamal Karunarathne

  Hi programming lovers, This is a question I've been asking myself for a long time. Thought of throwing out it to you. From my experience of working on several Java based projects, I've seen tons of codes which we call 'dirty'. The unconventional class/method/field naming, wrong way of handling of exceptions, unnecessarily heavy loops and recursion etc. But the code gives the intended results. Though I hate to see dirty code, it's time taking to clean them up and eventually comes the question of "is it worth? it's giving the desired results so what's the point of cleaning?" In team projects, should there be someone specifically to refactor and check for clean code? Or are there situations where the 'dirty' codes fail to give intended results or make the customers unhappy? Do feel free to comment and reply. And tell me if I'm missing something here. Thanks.

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