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• what is a normal developer to pageview ratio?

  - by Anthony Shull

  I work for an e-commerce site that has lately been shedding its workforce. I was hired ten months ago as a UI Developer. At that time we had three other developers. One was the technical lead who had been with the company for 10 years. The other two were server-side developers who had been there for 10 and 3.5 years respectively. In ten months, the technical lead left for a better position, one developer was laid off, and the other very recently left. So, I am now the only developer on staff. We have one DBA and one network administrator. They are currently looking to hire another developer but are not willing to pay enough to hire a senior person. I consider myself a junior developer with two years of experience. I have argued that we need to hire at least one senior developer and another junior developer if we're going to keep our current site operational (not to mention develop new features)...even if that means laying off staff in other departments. Right now we get 6.5 million pageviews per month, and I feel like 3.2 million pageviews per developer must be incredibly abnormal. My question is then: what is a normal developer to pageview ratio? Are there any industry standards or literature on the subject that I can use to argue for more staff?

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• How should I manage "reverting" a branch done with bookmarks in mercurial?

  - by Earlz

  I have an open source project on bitbucket. Recently, I've been working on an experimental branch which I (for whatever reason) didn't make an actual branch for. Instead what I did was use bookmarks. So I made two bookmarks at the same revision test --the new code I worked on that should now be abandoned(due to an experiment failure) main -- the stable old code that works I worked in test. I also pushed from test to my server, which ended up switching the tip tag to the new unstable code, when I really would've rather it stayed at main. I "switched" back to the main bookmark by doing a hg update main and then committing an insignificant change. So, I pushed this with hg push -f and now my source control is "correct" on the server. I know that there should be a cleaner way to "switch" branches. What should I do in the future for this kind of operation?

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• storing map template in database

  - by Timigen

  I am working on an application that displays choropleth maps. These maps are of all different types, some display state by county, country by state/province, or world by country. How should I handle storing the map information in the database? My Thoughts: I won't need to do queries to find POI inside a region, so I don't think there is a need to use spatial datatypes. I am considering storing a map as a geoJSON object (I am using JS mapping library that accepts geoJSON). The only issue is what if I want a map of the US northeast. Then I would have geoJSON for the US and a separate one for the US northeast, which would be redundant. Would it make sense to have a shape database where I had each state then when I needed a map of the US I could query for each state, and when I needed a map of the US Northeast I could again query for what I need? Note: I am not concerned with storing the data for each region, just the region itself. I will query for the data on the fly for the specific region.

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• How does a website latency simulator work

  - by nighthawk457

  Sites like webpagetest allow users to enter a website url and a test location, to run a speed test on the site from multiple locations using real browsers. Can anyone give me a basic idea of how sites like this work? You also have plugin's like Aptimize latency simulator or charles web debugging proxy app, that simulate the delay while accessing a site from different locations. I am assuming since these are plugin's these function in a different way. How do these plugin's work ?

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• Business Objects - Containers or functional?

  - by Walter

  This is a question I asked a while back on SO, but it may get discussed better here... Where I work, we've gone back and forth on this subject a number of times and are looking for a sanity check. Here's the question: Should Business Objects be data containers (more like DTOs) or should they also contain logic that can perform some functionality on that object. Example - Take a customer object, it probably contains some common properties (Name, Id, etc), should that customer object also include functions (Save, Calc, etc.)? One line of reasoning says separate the object from the functionality (single responsibility principal) and put the functionality in a Business Logic layer or object. The other line of reasoning says, no, if I have a customer object I just want to call Customer.Save and be done with it. Why do I need to know about another class to save a customer if I'm consuming the object? Our last two projects have had the objects separated from the functionality, but the debate has been raised again on a new project. Which makes more sense and why??

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• Programmer performance

  - by RSK

  I am a PHP programmer with 1 year of experience. As I am just starting my career, I am learning a lot of things now. I can say I am a little bit of a perfectionist. When I am assigned a problem I start off by Googling. Then, even when I find a solution, I keep trying for a better one until I find 2-3 options. Then I start learning it and choose the best performing solution. Even though I am learning a lot, this process gets me labeled as a low performer. My questions: As a novice, should I continue to use this learning process and not worry about my performance? Should I focus more on my performance and less on how the code performs?

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• What can Haskell's type system do that Java's can't and vice versa?

  - by Matt Fenwick

  I was talking to a friend about the differences between the type systems of Haskell and Java. He asked me what Haskell's could do that Java's couldn't, and I realized that I didn't know. After thinking for a while, I came up with a very short list of minor differences. Not being heavy into type theory, I'm left wondering whether they're formally equivalent. To try and keep this from becoming a subjective question, I'm asking: what are the major, non-syntactical differences between their type systems? I realize some things are easier/harder in one than in the other, and I'm not interested in talking about those. And to make it more specific, let's ignore Haskell type extensions since there's so many out there that do all kinds of crazy/cool stuff.

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• What are the most important OO skills to show off in the job hunt?

  - by Kat

  I am in the market for new employment, and found a position were they asked me to create a programming sample based off an assignment. I blew the sample trying to get it done quickly one night, and got declined - only to be given a second chance recently. The concern was that I didn't really demonstrate object oriented knowledge. I've rethought my approach but I figure it's worth asking: if you were hiring someone for an OO position, what skills would you most want to see them demonstrate they had a firm grasp on? I want to be sure that I'm missing anything important this time around.

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• Django as Python extension?

  - by NoobDev4iPhone

  I come from php community and just started learning Python. I have to create server-side scripts that manipulate databases, files, and send emails. Some of it I found hard to do in python, comparing to php, like sending emails and querying databases. Where in php you have functions like mysql_query(), or email(), in python you have to write whole bunch of code. Recently I found Django, and my question is: is it a good framework for network-oriented scripts, instead of using it as a web-framework?

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• What do you think are the biggest software development issues, in small to medium businesses?

  - by Ron-Damon

  Hi, I own a small software development company that developes Web software to other small and medium companies in Chile. The business process is very complex and it is hard to stablish where to put the efforts to make our company better, more efficient, and give better solutions. I'm also a TI master's degree student and i'm making a paper about this subject, so any help would be great to help my company and my paper. I have considered 3 areas for the problems: 1) Software development problems 2) Web development problems 3) Small and Medium companies problems I don't know about you, but at least this "business formula" in Chile has not received very much support but it is getting better, but today my company is far from being self-sufficient. UPDATE: Thanks guys for your support so far, i'm updating because i have somewhat enough information so i decided to go deeper within the subjects, wish i would like you to consider for your next answers/commentaries on the subject: 1) Software development problems (3) 1.1 Incomplete problem picture 1.2 Useless delivered software 1.3 Unrealistic or inadequate schedule 2) Web development problems (3) 2.1 Apparently non-viable implementation 2.2 Unefficient module construction design 2.3 Reduced result system inter-operability 3) Small and Medium companies problems (3) 3.1 Very specific, but narrowed requerired system characteristics 3.2 Developed system is not used 3.3 Positivist demand for activities in project execution There are only 3 problems for category, to deliberately keep a thiner scope. Also, i have considered that it would have been apropiated to separate the third clasification on two, but won't be doing it just now: 3) Small and Medium software developement providers problems 4) Small and Medium software developement clients problems In that case, i think i would have made the scope of the problem wider and it is not what i want to do now, until at least i'm very trough with the other two clasifications. What you think?

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• what are the benefits of closure, primarily for PHP?

  - by Patrick

  I am beginning the process of moving code over to PHP 5.3 and one of the most highly touted features of PHP 5.3 is the ability to use closures. My understanding of closures is that they allow anonymous functions, can be assigned to variable names, and have interesting scoping abilities. From my point of view the only seeming benefits in real world applications is the reduction of clutter in the namespace because closures are anonymous. Am I wrong in this? Should I be trying to put closures wherever I code? EDIT: I have already read this post on Javascript closures.

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• What should you leave behind for your successors?

  - by SnOrfus

  Assume that you're a sole developer leaving a job. What kind of information/material, outside of the code itself, should you create and leave behind for your replacement? An obvious answer is "whatever you would want at a new job" for sure, but it's been a while since I started a new job, and I forget what the most important things that I needed were back then. I'm thinking: accounts/passwords location of equpiment What else?

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• How does whitespace affect Python code?

  - by Codereview

  I've started programming about a year ago, I've learned the C and C++ languages and bits of Java. Recently I've started to learn the Python language (Notable: I'm using the Eclipse IDE). I'm used to formatting my code with whitespace, placing statements a bit to the right of my code for easier readability. Since I started working with Python it seems whitespace is a problem, I get some unnecessary whitespace warnings, and my code gets underlined (In eclipse). After a while I figured Python is very restrictive about whitespace for some reason, so I've been looking for the effects of whitespace on Python code. How does it affect the code? Does the code work different with unnecessary whitespace?

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• How to become a more organized programmer?

  - by Ted Wong

  I am a programmer that can code. But I find that I can get thing done, but not get thing do well or like most of the open source communities do. Well, I use some of the library from git hub. I find most of the programme is well structure. Also, a read me. My question are: Is that any common file structure or naming convention in the community or this is just a matter of personal taste? How to become a more organized programmer, instead of writing code just work. But more organized that let other easy to get in your project?

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• How do I implement the bg, &, and bg commands functionaliity in my custom unix shell program written in C

  - by user1631009

  I am trying to extend the functionality of my custom unix shell which I earlier wrote as part of my lab assignment. It currently supports all commands through execvp calls, in-built commands like pwd, cd, history, echo and export, and also redirection and pipes. Now I wanted to add the support for running a command in background e.g. $ls -la& Now I also want to implement bg and fg job control commands. I know this can be achieved if I execute the command by forking a new child process and not waiting for it in the parent process. But how do I again bring this command to foreground using fg? I have the idea of entering each background command in a list assigning each of them a serial number. But I don't know how do I make the processes execute in the background, then bring them back to foreground. I guess wait() and waitpid() system calls would come handy but I am not that comfortable with them. I tried reading the man pages but still am in the dark. Can someone please explain in a layman's language how to achieve this in UNIX system programming? And does it have something to do with SIGCONT and SIGSTP signals?

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• Web Site Development Software for VirtualBox Ubuntu 11.04

  - by Paul Sonier

  I'm doing some development of a website on a VirtualBox guest running Ubuntu 11.04 (host is running Windows, but I want to do the web development in a Linux environment). My development languages are primarily PHP and Javascript (using Apache and node.js). The question is this: is there a good IDE for work under these conditions that can handle running virtualized? I tried Eclipse, and was not particularly thrilled with the performance; I'm wondering if there's some other way to do this than to do all my text editing in emacs.

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• Any experience on open source database synchronization open source solutions? [on hold]

  - by Boris Pavlovic

  I'm considering few database synchronization open source solutions. The system in need for data synchronization is composed of instances of different types of databases, i.e. heterogeneous system. There are few candidates: Symmetric DS Talend's Data Integration with support for data synchronization Continuent's Tungsteen Replication Daffodil Replicator OS Do you have any real world experience with any of these tools?

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• Always keep files updated in Eclipse

  - by AK01

  I keep lots of files/editors open in Eclipse. I also love using git stash and other git commands that essentially change the contents of my open files. Is there an Eclipse feature or plugin that will always keep the contents of my open files up to date and live? Currently if I put focus in an out of sync editor, I get an awkwardly worded dialog that I have to parse carefully every time. I wish it would just keep me synced like Textmate does.

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• Regular Expression HTML tags

  - by user134615

  I'd like to know whether it exists a way to put the following HTML tags in a regex. What I want is a regex that can match all the start tags with their corresponding closing tags. E.g., Hello There might be more tags inside. I had thought of something like this: ^<([a-z]+)([^<]+)(?:(.)</\1|\s+/)$/, but it wont work. Sorry if this question doesnt belong to this section. Thank you.

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• How to detect two moving shapes overlapped?

  - by user1389813

  Given a list of circles with its coordinates (x and y) that are moving every second in different direction (South-East, South-West, North-East and North-West), and the circle will change direction if it hits the wall sort of like bouncing, so how do we detect if any of them collide or overlap with each other ? I am not sure if we can use some data structures like a Binary Search Tree because since all the coordinates vary every seconds, so the tree will have to re-build accordingly. Or can we use Vertical Sweep Line Algorithm each time ? Any ideas on how to do this in a efficient way ?

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• Networking Programs Suitable For Symbolic Testing

  - by Milen

  Symbolic execution has been successfully used to test programs and automatically generate test cases. I've been working on my master's thesis that allows the testing of arbitrary networked programs (i.e., those communicating via sockets). Now that we have a working symbolic execution engine that has support for sockets, we're looking for real-world pieces of software to test. Our engine has an important restriction (at the moment): it cannot execute multi-threaded programs. So, we're looking for programs that satisfy the criteria outlined below: Written in C Communicates via sockets (TCP / UDP are supported) Does not rely on the filesystem to get the "job" done Runs on Linux Does not use multi-threading Source is available (so that we can compile them to LLVM bytecode) Most programs that would fall under the criteria would probably be implementations of distributed protocols solving a particular problem (e.g., consensus). Any suggestions are greatly appreciated.

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• How to implement Facebook leaderboard game for mobile?

  - by TrueGrime

  I am in the final stages of developing an indie C# mobile game that I will deploy to iPhones and Androids using Mono. I wish to add push notifications and a Facebook leader board feature into the game, such that the user will be presented with a list of all his/her friends that are playing the game and their weekly scores in the main screen. I have ZERO experience with web development/networking/databases. I recently started researching the field and formed a basic understanding. Facebook has SDKs in PHP, JavaScript, obj-c and java, tho reading the documentation examples still feels cryptic to me since it involves web/server tech. After researching some more, I understood that my options for server side are basically PHP or ASP.Net. It seems that ASP.Net is more favorable in my case since I am already proficient with C# (but there is no ASP.net SDK from Facebook... I am not sure if this implies that I cant interact with Facebook using ASP.Net). On the down side some have mentioned higher costs for ASP.Net, tho I havent looked further into that aspect yet. I also understood that JavaScript is client side technology. I started going through tutorials of ASP.Net, I was thinking that ASP.Net is a purely server side management language, but it started feeling more like WPF as those tutorials started getting into very lengthy discussions about creating website interfaces and styles. I am not interested in that, I just want to have a web server which my app can somehow communicate with and get friends/scores. Am I learning the right technologies for my goal? should I be learning something else? I am posting this in hopes that someone who knows this field well can see through my problem and help guide me, otherwise I could spend months studying something that might not be the right solution to my goal. Thanks.

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• Predicting advantages of database denormalization

  - by Janus Troelsen

  I was always taught to strive for the highest Normal Form of database normalization, and we were taught Bernstein's Synthesis algorithm to achieve 3NF. This is all very well and it feels nice to normalize your database, knowing that fields can be modified while retaining consistency. However, performance may suffer. That's why I am wondering whether there is any way to predict the speedup/slowdown when denormalizing. That way, you can build your list of FD's featuring 3NF and then denormalize as little as possible. I imagine that denormalizing too much would waste space and time, because e.g. giant blobs are duplicated or it because harder to maintain consistency because you have to update multiple fields using a transaction. Summary: Given a 3NF FD set, and a set of queries, how do I predict the speedup/slowdown of denormalization? Link to papers appreciated too.

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• Dynamic Forms: Pattern or AntiPattern?

  - by Segfault

  I'm sure you've seen it. The database has a bunch of tables called Forms, Controls,FormsControls, ControlSets, Actions and the program that queries these tables has a dynamically generated user interface. It will read all the forms, load a home page that has links to them all, or embed them in some tabbed or paged home page, and for each of those forms it will read the various text boxes, check boxes, radio buttons, submit buttons, combo boxes, labels and whatnot from the controls and form-to-control join tables, lay those elements out according to the database and link all the controls to logic according to other rules in the database. To me, this is an anti-pattern. It actually make the application more difficult to maintain because the design of it is now spread out into multiple different systems. Also, the database is not source controlled. Sure, it may make one or two changes go more quickly, after you've analyzed the program anyway to understand how to change the data and as long as you don't stray from the sort of changes that were anticipated and accounted for, but that's often just not sustainable. What say you?

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• clear explanation sought: throw() and stack unwinding

  - by Jerry Gagelman

  I'm not a programmer but have learned a lot watching others. I am writing wrapper classes to simplify things with a really technical API that I'm working with. Its routines return error codes, and I have a function that converts those to strings: static const char* LibErrString(int errno); For uniformity I decided to have member of my classes throw an exception when an error is encountered. I created a class: struct MyExcept : public std::exception { const char* errstr_; const char* what() const throw() {return errstr_;} MyExcept(const char* errstr) : errstr_(errstr) {} }; Then, in one of my classes: class Foo { public: void bar() { int err = SomeAPIRoutine(...); if (err != SUCCESS) throw MyExcept(LibErrString(err)); // otherwise... } }; The whole thing works perfectly: if SomeAPIRoutine returns an error, a try-catch block around the call to Foo::bar catches a standard exception with the correct error string in what(). Then I wanted the member to give more information: void Foo::bar() { char adieu[128]; int err = SomeAPIRoutine(...); if (err != SUCCESS) { std::strcpy(adieu,"In Foo::bar... "); std::strcat(adieu,LibErrString(err)); throw MyExcept((const char*)adieu); } // otherwise... } However, when SomeAPIRoutine returns an error, the what() string returned by the exception contains only garbage. It occurred to me that the problem could be due to adieu going out of scope once the throw is called. I changed the code by moving adieu out of the member definition and making it an attribute of the class Foo. After this, the whole thing worked perfectly: a try-call block around a call to Foo::bar that catches an exception has the correct (expanded) string in what(). Finally, my question: what exactly is popped off the stack (in sequence) when the exception is thrown in the if-block when the stack "unwinds?" As I mentioned above, I'm a mathematician, not a programmer. I could use a really lucid explanation of what goes onto the stack (in sequence) when this C++ gets converted into running machine code.

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