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• Scheme vs Common Lisp: war stories

  - by SuperElectric

  There are no shortage of vague "Scheme vs Common Lisp" questions on both StackOverflow and on this site, so I want to make this one more focused. The question is for people who have coded in both languages: While coding in Scheme, what specific elements of your Common Lisp coding experience did you miss most? Or, inversely, while coding in Common Lisp, what did you miss from coding in Scheme? I don't necessarily mean just language features. The following are all valid things to miss, as far as the question is concerned: Specific libraries. Specific features of development environments like SLIME, DrRacket, etc. Features of particular implementations, like Gambit's ability to write blocks of C code directly into your Scheme source. And of course, language features. Examples of the sort of answers I'm hoping for: "I was trying to implement X in Common Lisp, and if I had Scheme's first-class continuations, I totally would've just done Y, but instead I had to do Z, which was more of a pain." "Scripting the build process in my Scheme project got increasingly painful as my source tree grew and I linked in more and more C libraries. For my next project, I moved back to Common Lisp." "I have a large existing C++ codebase, and for me, being able to embed C++ calls directly in my Gambit Scheme code was totally worth any shortcomings that Scheme may have vs Common Lisp, even including lack of SWIG support." So, I'm hoping for war stories, rather than general sentiments like "Scheme is a simpler language" etc.

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• pros and cons of taking an ABAP job

  - by sJhonny

  I'm a programmer with 3 years of .NET experience under my belt, and am currently looking for a new job. One of the options I'm considering is as an OO ABAP developer position with SAP. However, I have several concerns about taking an ABAP job: as ABAP is used exclusively by SAP, any experience in ABAP that I have would be irrelevant in the outside world. I'm also worried that I wouldn't be exposed to new technologies while working in ABAP, and ultimately I would lose touch with what's going on in the world. This is a real sore point, since I really enjoy exploring and learning new & cool stuff. (*note: Yes, I could experiment with other technologies & trends on my own time, but this is much harder to do, and isn't really the same as working full-time with them) One of the nicest things about programming, for me, is finding a great OO architecture / design (I'm really into object-oriented :)). I know that ABAP is a procedural language, and I'm not certain how 'OO' it's OO version is. This leads me to the conclusion that, unless I stay with SAP to the end of my career, any time spent there would be professionaly unbenificial. Is there anyone who can shed some light on these opinions? are my concerns founded? Are there any advantages (career and technology-wise) to ABAP that I'm missing?

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• What's the best license for my website?

  - by John Maxim

  I have developed a unique website but do not have a lot of fund to protect it with trademark or patents. I'm looking for suggestions so that when my supervisor gets my codes, some laws restrict anyone from copying it and claim their work. I'm in the middle of thinking, making the application a commercial one or never allowing it to be copied at all. What kind of steps am I required to take in order to make full measurements so my applications are fully-protected? I've come across a few, one under my consideration is MIT license. Some say we can have a mixture of both commercial and MIT. I would also like to be able to distribute some functions so it can be modified by others but I'd still retain the ownership. Last but not least, it's confusing when I think of protecting the whole website, and protecting codes by codes in division. How should we go about this? Thanks. N.B I have to pass it over to the supervisor as this is a Uni project. I need this to be done within 2 weeks. So time to get my App protected is a factor here.

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• How to become a Kernel/Systems/Device driver programmer?

  - by accordionfolder

  Hello all! I currently work in a professional capacity as a software engineer working with the Android OS. We work at integrating our platform as a native daemon among other facets of the project. I primarily work in Java developing the SDK and Android applications, but get to help with the platform in C/C++. Anywho, I have a great interest to work professionally developing low level for linux. I am not unhappy in my current position and will hang around as long as the company lets me (as a matter of fact I quite enjoy working there!), but I would like to work my way that direction. I've been working through Linux Kernel Development (Robert Love) and The Linux Programming Interface (Michael Kerrisk) (In addition to strengthening my C skills at every chance I get) and casually browsing Monster and similar sites. The problem I see is, there are no entry level positions. How does one break into this field? Anytime I see "Linux Systems Programmer" or "Linux Device Driver Programmer" they all require at the minimum 5-7 years of relevant experience. They want someone who knows the ropes, not a junior level programmer (I've been working for 7 months now...). So, I'm assuming, that some of you on stackoverflow work in a professional capacity doing just what I would like to do. How did you get there? What platforms did you use to work your way there? Am I going to have a more difficult time because I have my bachelors in CSC as opposed to a computer engineer (where they would experience a bit more embedded, asm, etc)?

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• How to Create image grid view gallery and on click show description by particular image?

  - by Priya jain

  I am Getting stuck on j-query issue i am new to it please help me! I have a image gallery like: Now i want a div to be open when i click on open link and view full description of respective image. My html code is: <ul class="thumb-pic"> <li class="box_small"> <div class="director-detail"> <div align="right"><a href="#" class="open_div">Open</a><a href="#" class="close_div">Close</a></div> <div class="director-name">David MacLeod Dip OHS</div> <div class="director-position"> Director</div> </div> <img src="images/pic1.jpg" alt="pic"> </li> <li class="large_box"> <div align="right"><a href="#" class="open_div">Open</a><a href="#" class="close_div">Close</a></div> <img src="images/pic1.jpg" alt="pic" class="small_img"> <div class="desc"> <div class="director-name">David MacLeod Dip OHS</div> <div class="director-position"> Director</div> <p>All Macil staff are true specialists in their chosen fields and bring a unique set of skills and expertise and a desire to work in the investigation industry. Macil aims to provide a work environment that is empowering, inspiring and motivational</p> </div> </li> <li class="box_small"> <div class="director-detail"> <div align="right"><a href="#" class="open_div">Open</a><a href="#" class="close_div">Close</a></div> <div class="director-name">David MacLeod Dip OHS</div> <div class="director-position"> Director</div> </div> <img src="images/pic2.jpg" alt="pic"> </li> <li class="large_box"> <div align="right"><a href="#" class="open_div">Open</a><a href="#" class="close_div">Close</a></div> <img src="images/pic2.jpg" alt="pic" class="small_img"> <div class="desc"> <div class="director-name">David MacLeod Dip OHS</div> <div class="director-position"> Director</div> <p>All Macil staff are true specialists in their chosen fields and bring a unique set of skills and expertise and a desire to work in the investigation industry. Macil aims to provide a work environment that is empowering, inspiring and motivational</p> </div> </li> <li class="box_small"> <div class="director-detail"> <div align="right"><a href="#" class="open_div">Open</a><a href="#" class="close_div">Close</a></div> <div class="director-name">David MacLeod Dip OHS</div> <div class="director-position"> Director</div> </div> <img src="images/pic3.jpg" alt="pic"> </li> <li class="large_box"> <div align="right"><a href="#" class="open_div">Open</a><a href="#" class="close_div">Close</a></div> <img src="images/pic3.jpg" alt="pic" class="small_img"> <div class="desc"> <div class="director-name">David MacLeod Dip OHS</div> <div class="director-position"> Director</div> <p>All Macil staff are true specialists in their chosen fields and bring a unique set of skills and expertise and a desire to work in the investigation industry. Macil aims to provide a work environment that is empowering, inspiring and motivational</p> </div> </li> </ul> And Jquery code that i am using: <script type="text/javascript"> $(function() { $('#st-accordion').accordion({ oneOpenedItem : true }); }); $(document).ready(function(){ $('.open_div').click(function(){ $('.large_box').show(); $(this).prev('li .box_small').hide(); }); $('.close_div').click(function(){ $('.large_box').hide(); $('.box_small').show(); }); }); </script> I am new to jquery Please help me or give me some direction to achieve the solution.

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• how to evaluate own project

  - by gruszczy

  I am working on a open source project in pure C, that I have started some time ago, but only recently found time to add some features. I can clearly some weaknesses of my old design, so I am trying to refactor my old code. I have no idea however, how to evaluate properly my new code. Do you know about any techniques or tools for code evaluation? I am pretty good with object oriented design, but for about three years I had no contact with purely structural one. Therefore I don't have enough experience, to be able to discern between good and bad design choices.

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• Project Management, Developer being project managers manager

  - by marabutt

  I am in the planning stages of a project and am looking to hire a project manager. I want be doing some coding and keeping an eye on all parts of the project but feel a project manager will get better results than I could. I can project manage the project and not code and hire another coder or code myself and hire a project manager. I am worried that the project manager will fell impeded by having the project owner as part of the development team. If I run the project, the team might fall apart causing the project to fail. To stick within budget, I have to be involved in one capacity or another. Does anyone have experience with this situation or suggestions?

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• Why isn't SSL/TLS built into modern Operating Systems?

  - by Channel72

  A lot of the basic network protocols that make up the infrastructure of the Internet are built in to most major Operating Systems. Things like TCP, UDP, and DNS are all built into Linux, UNIX and Windows, and are made available to the programmer through low-level system APIs. But when it comes to SSL or TLS, one has to turn to a third-party library such as OpenSSL or Mozilla NSS. SSL is a relatively old protocol, and it's basically an industry standard as ubiquitous as TCP/IP, so why isn't it built into most Operating Systems?

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• Do unit tests sometimes break encapsulation?

  - by user1288851

  I very often hear the following: "If you want to test private methods, you'd better put that in another class and expose it." While sometimes that's the case and we have a hiding concept inside our class, other times you end up with classes that have the same attributes (or, worst, every attribute of one class become a argument on a method in the other class) and exposes functionality that is, in fact, implementation detail. Specially on TDD, when you refactor a class with public methods out of a previous tested class, that class is now part of your interface, but has no tests to it (since you refactored it, and is a implementation detail). Now, I may be not finding an obvious better answer, but if my answer is the "correct", that means that sometimes writting unit tests can break encapsulation, and divide the same responsibility into different classes. A simple example would be testing a setter method when a getter is not actually needed for anything in the real code. Please when aswering don't provide simple answers to specific cases I may have written. Rather, try to explain more of the generic case and theoretical approach. And this is neither language specific. Thanks in advance. EDIT: The answer given by Matthew Flynn was really insightful, but didn't quite answer the question. Altough he made the fair point that you either don't test private methods or extract them because they really are other concern and responsibility (or at least that was what I could understand from his answer), I think there are situations where unit testing private methods is useful. My primary example is when you have a class that has one responsibility but the output (or input) that it gives (takes) is just to complex. For example, a hashing function. There's no good way to break a hashing function apart and mantain cohesion and encapsulation. However, testing a hashing function can be really tough, since you would need to calculate by hand (you can't use code calculation to test code calculation!) the hashing, and test multiple cases where the hash changes. In that way (and this may be a question worth of its own topic) I think private method testing is the best way to handle it. Now, I'm not sure if I should ask another question, or ask it here, but are there any better way to test such complex output (input)? OBS: Please, if you think I should ask another question on that topic, leave a comment. :)

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• Type Casting variables in PHP: Is there a practical example?

  - by Stephen

  PHP, as most of us know, has weak typing. For those who don't, PHP.net says: PHP does not require (or support) explicit type definition in variable declaration; a variable's type is determined by the context in which the variable is used. Love it or hate it, PHP re-casts variables on-the-fly. So, the following code is valid: $var = "10"; $value = 10 + $var; var_dump($value); // int(20) PHP also alows you to explicitly cast a variable, like so: $var = "10"; $value = 10 + $var; $value = (string)$value; var_dump($value); // string(2) "20" That's all cool... but, for the life of me, I cannot conceive of a practical reason for doing this. I don't have a problem with strong typing in languages that support it, like Java. That's fine, and I completely understand it. Also, I'm aware of—and fully understand the usefulness of—type hinting in function parameters. The problem I have with type casting is explained by the above quote. If PHP can swap types at-will, it can do so even after you force cast a type; and it can do so on-the-fly when you need a certain type in an operation. That makes the following valid: $var = "10"; $value = (int)$var; $value = $value . ' TaDa!'; var_dump($value); // string(8) "10 TaDa!" So what's the point? Can anyone show me a practical application or example of type casting—one that would fail if type casting were not involved? I ask this here instead of SO because I figure practicality is too subjective. Edit in response to Chris' comment Take this theoretical example of a world where user-defined type casting makes sense in PHP: You force cast variable $foo as int -- (int)$foo. You attempt to store a string value in the variable $foo. PHP throws an exception!! <--- That would make sense. Suddenly the reason for user defined type casting exists! The fact that PHP will switch things around as needed makes the point of user defined type casting vague. For example, the following two code samples are equivalent: // example 1 $foo = 0; $foo = (string)$foo; $foo = '# of Reasons for the programmer to type cast $foo as a string: ' . $foo; // example 2 $foo = 0; $foo = (int)$foo; $foo = '# of Reasons for the programmer to type cast $foo as a string: ' . $foo;

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• Mapping between 4+1 architectural view model & UML

  - by Sadeq Dousti

  I'm a bit confused about how the 4+1 architectural view model maps to UML. Wikipedia gives the following mapping: Logical view: Class diagram, Communication diagram, Sequence diagram. Development view: Component diagram, Package diagram Process view: Activity diagram Physical view: Deployment diagram Scenarios: Use-case diagram The paper Role of UML Sequence Diagram Constructs in Object Lifecycle Concept gives the following mapping: Logical view (class diagram (CD), object diagram (OD), sequence diagram (SD), collaboration diagram (COD), state chart diagram (SCD), activity diagram (AD)) Development view (package diagram, component diagram), Process view (use case diagram, CD, OD, SD, COD, SCD, AD), Physical view (deployment diagram), and Use case view (use case diagram, OD, SD, COD, SCD, AD) which combines the four mentioned above. The web page UML 4+1 View Materials presents the following mapping: Finally, the white paper Applying 4+1 View Architecture with UML 2 gives yet another mapping: Logical view class diagrams, object diagrams, state charts, and composite structures Process view sequence diagrams, communication diagrams, activity diagrams, timing diagrams, interaction overview diagrams Development view component diagrams Physical view deployment diagram Use case view use case diagram, activity diagrams I'm sure further search will reveal other mappings as well. While various people usually have different perspectives, I don't see why this is the case here. Specially, each UML diagram describes the system from a particular aspect. So, for instance, why the "sequence diagram" is considered as describing the "logical view" of the system by one author, while another author considers it as describing the "process view"? Could you please help me clarify the confusion?

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• Using VS12 to create and manage an Azure-SQL DB (simple tasks)

  - by Konrad Viltersten

  On occasion, I'm in a project where I need to store some information in an external DB. Usually, I create one in Azure and run some scripts that I adapt (the usual create table, create login etc.). It just struck me that there might (and definitely should) be a tool in VS that allows me to create a project for my DB, pull out some boxes to create a model of a DB schema, execute a script or two on it (possibly virtual or temporary) and then somehow push it up the cloud. Haven't found such a tool. Is there one and how do I get to it? NB. I'm not looking for an optimized or well structured schema (that's what the DB pros are for at a later stage). I'm not a DB guy nor do I aspire to become one (too old, hehe). I'll probably be satisfied with a Q&D approach.

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• Sharing code in LGPL and proprietary software

  - by Martin

  Hi I'm working on a piece of software that'll be released as a dll under LGPL. The software interfaces with hardware from a small company that has provided me with the needed libraries and some code to use them correctly (not only headers but its all in a separate file). As far as i know, the same code is used in their proprietary software that they don't intend to open source but they'd be fine releasing the piece of code they've given me. Now here's the question: What license could be used on the code I got from the company? I guess using GPL or LGPL would make them violate GPL when using the same code in their other software. Is MIT a good idea? Is it ok to just include a file with MIT license on it in my otherwise LGPL:ed project? Since I'm not the copyright holder, I'd have to ask the company to apply the license obviously but that shouldn't be a problem. Thanks /Martin

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• Why isn't software as reliable as a car?

  - by Alex Angas

  I had a user ask me this question. We know that cars break down, but that's because of something physical (unless software is involved!). I tried to answer that software is a much younger industry, but the user countered with "didn't the automobile industry become much more stable than and reliable with less people?". I also tried to answer that software is more complex, but the user countered that there are many thousands of parts that make up a car. People that design and build cars generally just know their component(s) very well, but they still all end up working together as an end result. So, why isn't software as reliable as a car?

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• Essential management tools for a small/medium software development shop

  - by mikera

  I've recently started work with an organisation that is rapidly expanding and is recruiting or growing several development teams (including two web-based products and a data warehouse/BI team). They are basically working to agile methodologies but haven't formalised a standard way of working yet. Despite the fact that it is early days, I've been surprised by the lack of tools being used to manage the development processes (e.g. no issue tracker, no tool to manage the product backlog etc.) Although it's not my primary responsibility, I'd like to help them out with some recommendations on the most important tools they should get in place. What are the 3-5 top priority tools to establish for management of a good development shop? Why are they necessary? How do they improve the software development process, and how do I justify them to my bosses?

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• What are some great resources about programming contemporary GUIs and GUI architecture patterns?

  - by snitko

  So I've read Martin Fowler's old blog post http://martinfowler.com/eaaDev/uiArchs.html which describes various approaches to building GUI from an architecture point of view, discussing patterns and how they were used. But this blog post was written in 2006. Since then, there must have been some new ideas in the field? I was curious whether anyone knows about a similar guide to GUI architectures, but describing contemporary systems? The reason I'm interested in something abstract and theoretical to read is because it really is difficult and time consuming to ACTUALLY learn how ALL of the contemporary frameworks work, given their diversity and the diversity of the languages they are written in. I am primarily a web developer, so I'm familiar with Rails and some Javascript frameworks. But I would also like to know how GUI is built on Android or in Cocoa or in Windows, but without having to learn all of those things.

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• Web security course ?

  - by vtortola

  I'd like to do a course about web security. I've seen some certifications that could be interesting: CIW Web Security Professional CISSP® - Certified Information Systems Security Professional Certified Secure Software Lifecycle Professional What do you know about these certifications? are they recognized? I'm not trying to become a hacker, I just want to ensure I have enough knowledge about web security to cope with today internet. From my inexpert point of view, "Certified Secure Software Lifecycle Professional" looks exactly as I want, the problem is that it cost more than 500 bucks! Why certification? well, I want to learn but I would like also have a way to demonstrate to a future employer/customer that I had to study and pass exams, not only attend to a course. Regards.

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• prerequisites of learnig hadoop, can php developer learn hadoop without java experience [closed]

  - by Rishabh Mathur

  i am willing to learn hadoop as a Developer , but i am confused over the prerequisite of learning it.? is having a good experience in java programming very essential to learn hadoop? I have 4 years of experience in application development in LAMP. But i am not in touch with java programming as a part of my regular work.My objective to get into hadoop is to increase my knowledge in bigdata analysis as well as to get an oppurtunity in this domain. Any suggestions?

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• make-like build tools for data?

  - by miku

  Make is a standard tools for building software. But make decides whether a target needs to be regenerated by comparing file modification times. Are there any proven, preferably small tools that handle builds not for software but for data? Something that regenerates targets not only on mod times but on certain other properties (e.g. completeness). (Or alternatively some paper that describes such a tool.) As illustration: I'd like to automate the following process: get data (e.g. a tarball) from some regularly updated source copy somewhere if it's not there (based e.g. on some filename-scheme) convert the files to different format (but only if there aren't successfully converted ones there - e.g. from a previous attempt - custom comparison routine) for each file find a certain data element and fetch some additional file from say an URL, but only if that hasn't been downloaded yet (decide on existence of file and file "freshness") finally compute something (e.g. word count for something identifiable and store it in the database, but only if the DB does not have an entry for that exact ID yet) Observations: there are different stages each stage is usually simple to compute or implement in isolation each stage may be simple, but the data volume may be large each stage may produce a few errors each stage may have different signals, on when (re)processing is needed Requirements: builds should be interruptable and idempotent (== robust) when interrupted, already processed objects should be reused to speedup the next run data paths should be easy to adjust (simple syntax, nothing new to learn, internal dsl would be ok) some form of dependency graph, that describes the process would be nice for later visualizations should leverage existing programs, if possible I've done some research on make alternatives like rake and have worked a lot with ant and maven in the past. All these tools naturally focus on code and software build, not on data builds. A system we have in place now for a task similar to the above is pretty much just shell scripts, which are compact (and are a ok glue for a variety of other programs written in other languages), so I wonder if worse is better?

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• Fastest way to document software architecture and design

  - by Karsten

  We are a small team of 5 developers and I'm looking for some great advices about how to document the software architecture and design. I'm going for the sweet spot, where the time invested pays off. I don't want to use more time documenting than necessary. I'll quickly give you my thoughts. What are the diagrams I should made? I'm thinking an overall diagram showing the various applications and services. And then some sequence diagrams showing the most important or complicated processes. About the code it self, I really don't see much value in describing or making diagrams for the code outside the .cs files them self. About text documents, I'm a bit uncertain about when to put down on paper. Most developers don't like to either write or read long documents.

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• Where can I find fellow developers who are looking for help to create a startup?

  - by Jeremy Child

  Where can I find fellow developers who are looking for help to create a startup? Are there any collaboration websites whereby people pitch ideas and a group of people 'join' the project in an effort to create some kind of prototype? Edit: @Vitor Braga - Seriously i'm not looking to make money, just finding developers who are interested in making a trivial little app with someone else. Edit: It may be worthy to explain that I live in a remote area of Australia.

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• Am I right about the differences between Floyd-Warshall, Dijkstra's and Bellman-Ford algorithms?

  - by Programming Noob

  I've been studying the three and I'm stating my inferences from them below. Could someone tell me if I have understood them accurately enough or not? Thank you. Dijkstra's algorithm is used only when you have a single source and you want to know the smallest path from one node to another, but fails in cases like this Floyd-Warshall's algorithm is used when any of all the nodes can be a source, so you want the shortest distance to reach any destination node from any source node. This only fails when there are negative cycles (this is the most important one. I mean, this is the one I'm least sure about:) 3.Bellman-Ford is used like Dijkstra's, when there is only one source. This can handle negative weights and its working is the same as Floyd-Warshall's except for one source, right? If you need to have a look, the corresponding algorithms are (courtesy Wikipedia): Bellman-Ford: procedure BellmanFord(list vertices, list edges, vertex source) // This implementation takes in a graph, represented as lists of vertices // and edges, and modifies the vertices so that their distance and // predecessor attributes store the shortest paths. // Step 1: initialize graph for each vertex v in vertices: if v is source then v.distance := 0 else v.distance := infinity v.predecessor := null // Step 2: relax edges repeatedly for i from 1 to size(vertices)-1: for each edge uv in edges: // uv is the edge from u to v u := uv.source v := uv.destination if u.distance + uv.weight < v.distance: v.distance := u.distance + uv.weight v.predecessor := u // Step 3: check for negative-weight cycles for each edge uv in edges: u := uv.source v := uv.destination if u.distance + uv.weight < v.distance: error "Graph contains a negative-weight cycle" Dijkstra: 1 function Dijkstra(Graph, source): 2 for each vertex v in Graph: // Initializations 3 dist[v] := infinity ; // Unknown distance function from 4 // source to v 5 previous[v] := undefined ; // Previous node in optimal path 6 // from source 7 8 dist[source] := 0 ; // Distance from source to source 9 Q := the set of all nodes in Graph ; // All nodes in the graph are 10 // unoptimized - thus are in Q 11 while Q is not empty: // The main loop 12 u := vertex in Q with smallest distance in dist[] ; // Start node in first case 13 if dist[u] = infinity: 14 break ; // all remaining vertices are 15 // inaccessible from source 16 17 remove u from Q ; 18 for each neighbor v of u: // where v has not yet been 19 removed from Q. 20 alt := dist[u] + dist_between(u, v) ; 21 if alt < dist[v]: // Relax (u,v,a) 22 dist[v] := alt ; 23 previous[v] := u ; 24 decrease-key v in Q; // Reorder v in the Queue 25 return dist; Floyd-Warshall: 1 /* Assume a function edgeCost(i,j) which returns the cost of the edge from i to j 2 (infinity if there is none). 3 Also assume that n is the number of vertices and edgeCost(i,i) = 0 4 */ 5 6 int path[][]; 7 /* A 2-dimensional matrix. At each step in the algorithm, path[i][j] is the shortest path 8 from i to j using intermediate vertices (1..k-1). Each path[i][j] is initialized to 9 edgeCost(i,j). 10 */ 11 12 procedure FloydWarshall () 13 for k := 1 to n 14 for i := 1 to n 15 for j := 1 to n 16 path[i][j] = min ( path[i][j], path[i][k]+path[k][j] );

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• Avoiding new operator in JavaScript -- the better way

  - by greengit

  Warning: This is a long post. Let's keep it simple. I want to avoid having to prefix the new operator every time I call a constructor in JavaScript. This is because I tend to forget it, and my code screws up badly. The simple way around this is this... function Make(x) { if ( !(this instanceof arguments.callee) ) return new arguments.callee(x); // do your stuff... } But, I need this to accept variable no. of arguments, like this... m1 = Make(); m2 = Make(1,2,3); m3 = Make('apple', 'banana'); The first immediate solution seems to be the 'apply' method like this... function Make() { if ( !(this instanceof arguments.callee) ) return new arguments.callee.apply(null, arguments); // do your stuff } This is WRONG however -- the new object is passed to the apply method and NOT to our constructor arguments.callee. Now, I've come up with three solutions. My simple question is: which one seems best. Or, if you have a better method, tell it. First – use eval() to dynamically create JavaScript code that calls the constructor. function Make(/* ... */) { if ( !(this instanceof arguments.callee) ) { // collect all the arguments var arr = []; for ( var i = 0; arguments[i]; i++ ) arr.push( 'arguments[' + i + ']' ); // create code var code = 'new arguments.callee(' + arr.join(',') + ');'; // call it return eval( code ); } // do your stuff with variable arguments... } Second – Every object has __proto__ property which is a 'secret' link to its prototype object. Fortunately this property is writable. function Make(/* ... */) { var obj = {}; // do your stuff on 'obj' just like you'd do on 'this' // use the variable arguments here // now do the __proto__ magic // by 'mutating' obj to make it a different object obj.__proto__ = arguments.callee.prototype; // must return obj return obj; } Third – This is something similar to second solution. function Make(/* ... */) { // we'll set '_construct' outside var obj = new arguments.callee._construct(); // now do your stuff on 'obj' just like you'd do on 'this' // use the variable arguments here // you have to return obj return obj; } // now first set the _construct property to an empty function Make._construct = function() {}; // and then mutate the prototype of _construct Make._construct.prototype = Make.prototype; eval solution seems clumsy and comes with all the problems of "evil eval". __proto__ solution is non-standard and the "Great Browser of mIsERY" doesn't honor it. The third solution seems overly complicated. But with all the above three solutions, we can do something like this, that we can't otherwise... m1 = Make(); m2 = Make(1,2,3); m3 = Make('apple', 'banana'); m1 instanceof Make; // true m2 instanceof Make; // true m3 instanceof Make; // true Make.prototype.fire = function() { // ... }; m1.fire(); m2.fire(); m3.fire(); So effectively the above solutions give us "true" constructors that accept variable no. of arguments and don't require new. What's your take on this. -- UPDATE -- Some have said "just throw an error". My response is: we are doing a heavy app with 10+ constructors and I think it'd be far more wieldy if every constructor could "smartly" handle that mistake without throwing error messages on the console.

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• Decompilers - Myth or Fact ?

  - by Simon

  Lately I have been thinking of application security and binaries and decompilers. (FYI- Decompilers is just an anti-complier, the purpose is to get the source back from the binary) Is there such thing as "Perfect Decompiler"? or are binaries safe from reverse engineering? (For clarity sake, by "Perfect" I mean the original source files with all the variable names/macros/functions/classes/if possible comments in the respective headers and source files used to get the binary) What are some of the best practices used to prevent reverse engineering of software? Is it a major concern? Also is obfuscation/file permissions the only way to prevent unauthorized hacks on scripts? (call me a script-junky if you should)

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• Unable to create dynamic web application in IIS7 and above

  - by Dhwani

  Not able to view application in IIS after successfully calling below method: ServerManager serverMgr = new ServerManager(); Configuration config = serverMgr.GetApplicationHostConfiguration(); ConfigurationSection isapiCgiRestrictionSection = config.GetSection("system.webServer/security/isapiCgiRestriction"); ConfigurationElementCollection isapiCgiRestrictionCollection = isapiCgiRestrictionSection.GetCollection(); //ConfigurationElement addElement = isapiCgiRestrictionCollection.CreateElement("add"); //addElement["path"] = @"C:\Inetpub\wwwroot\"; //addElement["allowed"] = true; //addElement["groupId"] = @"ContosoGroup"; //addElement["description"] = @"Contoso Extension"; //isapiCgiRestrictionCollection.Add(addElement); //serverMgr.CommitChanges(); Site defaultSite = serverMgr.Sites["PharmaConnect"]; defaultSite.Applications.Add("/blogs3", @"C:\inetpub\wwwroot\blogs1"); serverMgr.CommitChanges(); I don't know how to create dynamically sub domain though c# code. We just tried to implement above. But unable to view application/virtual directory in iis. I have tried this, but didn't get success.

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