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• How to deferentiate between Programmer and JVM Exceptions

  - by Haxed

  As the title suggests, how can I tell a JVM thrown exception from a Programmatically(does this mean, thrown by a programmer or the program) thrown exception ? JVM Exceptions 1) ArrayIndexOutOfBoundsException 2) ClassCastException 3) NullPointerException Programmatically thrown 1) NumberFormatException 2) AssertionError Many Thanks

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• Programmer’s block

  - by Kev

  Any one suffer from programmer’s block, if so how do you kick start your brain again? I’ve been working on a project since I returned from two weeks holiday, it’s a piece of cake to finish but I’ve done everything but pull my finger out and finish the damn thing.

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• What should every ASP.Net programmer know ?

  - by Glennular

  How does one be called a ninja ASP.Net programmer? What set of tools and immediate knowledge(Without having to open MSDN, SO, or Google) should be known to be considered a master? Webforms or MVC...

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• What should every PHP programmer know ?

  - by Waseem

  I would to be a PHP/Mysql Programmer what is the technologies that i must know ? Like :- Frameworks IDEs Template Engines Ajax and Css Frameworks please tell me the minimum requirements that i must know , and tell me your favourite things in the previous list ? thanks

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• Does Jquery add value to JAVA / J2ee Programmer

  - by harigm

  I am java J2ee Programmer, I came across Jquery some where in Stack over flow, If I am Planning to learn Jquery My question is 1) Does Jquery Add any additional weightage in my Java / J2ee Career 2) If Yes, What way it can help me

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• Java Program Specialization - What is it? I don't understand it..

  - by KP65

  I'm reading about program specialization - specifically java and I don't think I quite understand it to be honest. So far what I understand is that it is a method for optimizing efficiency of programs by constraining parameters or inputs? How is that actually done? Can someone maybe explain to me how it helps, and maybe an example of what it actually does and how its done? Thanks

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• (C) Implementation tactics for heap allocators?

  - by hatorade

  Where are some good resources for looking at the pros/cons of different ways of implementing heap allocators? Resources touching on efficiency (fragmentation, throughput, etc) are preferred. I am NOT looking for simple code repositories.

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• To jQuery or not to jQuery?

  - by pws5068

  I rather enjoy adding practical eye-candy to the networking community I've been developing but as things start to stack up I worry about load times. Is it truly faster to have users load (a hopefully cached) copy of jquery from Google's repositories? Does using jQuery for AJAX calls improve/reduce efficiency over basic javascript xmlHTTP requests? Is there a practical way to cut down the number of included scripts? For example, I include jQuery and jQuery UI from google, table sorter, and a growl plug-in.

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• Local variable vs parameter

  - by Dhana

  function doIt(param) { var localVar = param; //do lots of stuff with localVar } function doIt(param) { //do lots of stuff with param } Is there any difference in terms of efficiency between the code above?

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• How do you go from a so so programmer to a great one? [closed]

  - by Cervo

  How do you go from being an okay programmer to being able to write maintainable clean code? For example David Hansson was writing Basecamp when in the process he created Rails as part of writing Basecamp in a clean/maintainable way. But how do you know when there is value in a side project like that? I have a bachelors in computer science, and I am about to get a masters and I will say that colleges teach you to write code to solve problems, not neatly or anything. Basically you think of a problem, come up with a solution, and write it down...not necessarily the most maintainable way in the world. Also my first job was in a startup, and now my third is in a small team in a large company where the attitude was/is get it done yesterday (also most of my jobs are mainly database development with SQL with a few ASP.NET web pages/.NET apps on the side). So of course cut/paste is more favored than making things more cleanly. And they would rather have something yesterday even if you have to rewrite it next month rather than to have something in a week that lasts for a year. Also spaghetti code turns up all over the place, and it takes very smart people to write/understand/maintain spaghetti code...However it would be better to do things so simple/clean that even a caveman/woman could do maintenance. Also I get very bored/unmotivated having to go modify the same things cut/pasted in a few locations. Is this the type of skill that you need to learn by working with a serious software organization that has an emphasis on maintenance and maybe even an architect who designs a system architecture and reviews code? Could you really learn it by volunteering on an open source project (it seems to me that a full time programmer job is way more practice than a few hours a week on an open source project)? Is there some course where you can learn this? I can attest that graduate school and undergraduate school do not really emphasize clean software at all. They just teach the structures/algorithms and then send you off into the world to solve problems. Overall I think the first thing is learning to write clean/maintainable code within the bounds of the project in order to become a good programmer. Then the next thing is learning when you need to do a side project (like a framework) to make things more maintainable/clean even while you still deliver things for the deadline in order to become a great programmer. For example, you are making an SQL report and someone gives you 100 calculations for individual columns. At what point does it make sense to construct a domain specific language to encode the rules in simply and then generate all the SQL as opposed to cut/pasting the query from the table a bunch of times and then adjusting each query to do the appropriate calculations. This is the type of thing I would say a great programmer would know. He/she would maybe even know ways to avoid the domain specific language and to still do all the calculations without creating an unmaintainable mess or a ton of repetitive code to cut/paste everywhere.

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• Could we build a mega-processor out of superconductors?

  - by Carson Myers

  A superconductor, once cooled below a critical temperature, loses all of its electrical resistance and therefore becomes 100% efficient. This means that when a current flows through a superconductor, none of the energy is lost to heat or light. Theoretically, could we build a processor out of superconductive materials, that could effectively run at, oh I don't know, say, 300ghz? or 5,000ghz? Since a superconductive circuit is 100% efficient, this means that once supplied with electricity, the source of power could be completely removed from the circuit and the current would continue to flow forever. So if we made all the components inside a computer out of superconductive materials, could we get away with only supplying power to the peripherals and save a-whole-lot on energy, while dramatically increasing computing speed? Might this be one of the next big breakthroughs in computing? What do you think?

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• Mouse-usable alt-tab for windows 7

  - by Florian Peschka

  I'm using Windows 7 with ye good olde Windows 2000 style (I favor usability and space over fancy-pants aero and effects) and am looking for a way I can make the ALT-TAB-Control interactable with my mouse. I generally have many many windows open, and pressing tab or shift-tab over and over again begings to really frustrate me, if i want to reach a certain program. Of course, I could just select the program on my taskbar, but that takes even longer. I really like the way mac os x has its alt-tab menu - more or less exactly the same, but I can select the program with my mouse. Is there something like that for my environment?

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• Detect and monitor changes to MySQL database

  - by Wolfpack'08

  I use Drupal, and instead of having to use the formal interface to make small changes to a site all the time, I am wondering if there is a way to determine what modifications Drupal makes to the database so that I can make them manually the next time. For example, if I use Drupal’s interface to add a module to the site, I would like to be able to find out what database entries it changes/adds so that if I want to add another module, I can add or change the file or database entry myself instead of having to go through Druapl. This way, I can have better control over the system as well as gain a greater understanding of how it works underneath. My environment is Windows XP, MySQL latest stable, phpmyadmin.

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• Most efficient way to use a laptop like a desktop? [closed]

  - by user74757

  When I'm at home (which is the vast majority of the time now in Summer), I rarely use my laptop away from my desk. When it is at the desk, I plug in a monitor through HDMI, a power cable, and a mouse and keyboard that always stay there. I was wondering if anyone had any recommendations as to a good dock or product that does a good job of transforming a laptop into a true "desktop replacement." Ideally, it would allow all the connections to remain in place, with minimal effort to take the laptop in and out of the fixture. Thanks for any suggestions!

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• Allow image upload - most efficient way?

  - by K-P

  Hey everyone, In my site, I currently only allow users to import images from other sites rather than uploading it themselves. The main reason for this is because I don't have much storage space on my host (relatively speaking). The host charges quite a bit for additional space. What are the alternatives to hosting images users upload (max 1mb size). Would it be a good idea to purchase separate cheap hosting with "unlimited space" (I know that's not true, but I'm guessing it's more than 1gb)? Or are there some caveats with this approach (e.g. security since the site should not be browsable, but accessed via another server)? Are there alternative ideas that I could employ? Thanks for any suggestions

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• Real life numbers needed: power requirements - Opteron 6100 vs. Westmere xeon 56xx

  - by deploymonkey

  They had an interesting discussion on which grazed (ARS) platform power requirements. Now for a 24/7 application, that's really important. If You have any numbers from the field, please share.

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• In which order does Excel process its formulae?

  - by dwwilson66

  I've got a fairly large spreadsheet with major calculations going on, and it's starting to slow down every time a value that's part of a calculated field is modified. I'm in the process of optimizing the file, adding arrays where I can, and seeing where I can shave off a few milliseconds here and there. Let's say there's data in Columns A-H. Column H is set based on relationships between values in Columns A, B and C, which change dynamically from an outside program. Users enter the data in Column F. Formulas in D & E calculate relationships between F & H and H & D, respectively. How does Excel manage formulae in the case, for instance, where they're dependent on data further into the sheet? Will my value in H be available the first time that the formulae in D & E calculate? or, will D & E calculate based on an old value for H, because H's update hasn't happened yet? Are there any efficiencies to be gained by positioning dependencies in particular rows or columns in the speadsheet? Do positions above and left the current position get processed sooner than things below and to the right?

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• C++: Is windows.h generally an efficient code library?

  - by Alerty

  I heard some people complaining about including the windows header file in a C++ application. They mentioned that it is inefficient. Is this just some urban legend or are there really some real hard facts behind it? In other words, if you believe it is efficient or inefficient please explain how this can be with facts. I am no C++ Windows programmer guru. It would really be appreciated to have detailed explanations.

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• Too late to become a programmer?

  - by Tomas

  Hi, Working in IT for 5 years, I focused on system integration - testing, performance tests and analysis, automation etc. Altough I am working for one of the biggest IT companies, I have the possibility to come up with my own ideas and realize them - for example I have written C# (with SQL backend) bugtracker application with management elements...and I really liked it. I am very creative person but being 25 y/o, I am wondering whether it is too late. I understand the logic of programming but as I was never very good in math I assume I have no chance to become professional programmer in this age. What do you think? Thanks

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• How can an amateur programmer become professional without formal education (college) outside the US

  - by AlexRednic

  What is the path? Do I get certified (Microsoft,Sun,etc)? How do I build reputation? How do I make myself valuable without a college degree? How do I make others recognize my value? These are just a few questions but all point in the same direction. Are any of you in the same situation? What paths did you follow to become a successful programmer without the need of formal education?

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• Freeware Programmer Calculator

  - by AdamC

  There have been lots of times in the past where a good programmer-oriented calculator would've saved me a lot of time. Lately, I've been doing quite a lot of bit manipulation, and having to do build/run to debug my calculations feels really slow. I've looked for something like this in the past, but found nothing that worked very well. The only thing that comes close is this one from AnalogX, but I can't get it to work or really do anything on my vista box which is where I'm doing most of my work at the moment. (btw - please send comments about my vista usage here;). Anyway, I'm looking for something for simple calculations using a C-like syntax with support for proper precenedce, operators, etc. Bonus points for cross-platform. The python interpreter was a great idea and is totally cross-platform. For windows only SpeQ is amazing. Thanks for the suggestions.

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• Career advice for a frustrated newbie programmer.

  - by Satoru.Logic

  Hi, all. This is my first year as a programmer. The programming language that I'm most familiar with is Python. I am maintaining a web2py based legacy system, alone, which means I have to grow up as an all-rounder. The original programmers on this project are nowhere to find, and there are hardly any usable documents about requirements or anything. I find it very frustrating every time I hear the users criticize the system, and I can't help explaining that "that was not my fault, those mess was there even before I entered this company." I wonder what should I do with this situation. Please give me some advice, thanks in advance.

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• Exercise 26 of The Pragmatic Programmer

  - by _ande_turner_

  There is a code snippet presented in The Pragmatic Programmer on page 143 as: public class Colada { private Blender myBlender; private Vector myStuff; public Colada() { myBlender = new Blender(); myStuff = new Vector(); } private doSomething() { myBlender.addIngredients(myStuff.elements()); } } This obeys the Law of Demeter / Principle of Least Knowledge. Is it preferable to, and are there any caveats for, replacing it with the following, which utilises Dependency Injection? public class Colada throws IllegalArgumentException { private Blender myBlender; private Vector myStuff; public Colada(Blender blender, Vector stuff) { blender == null ? throw new IllegalArgumentException() : myBlender = blender; stuff == null ? throw new IllegalArgumentException() : myStuff = stuff; } public getInstance() { Blender blender = new Blender(); Vector stuff = new Vector(); return new Colada(blender, stuff); } private doSomething() { myBlender.addIngredients(myStuff.elements()); } }

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• Pro JavaScript programmer interview questions (with answers)

  - by WooYek

  What are good questions to determine if applicant is really a pro JavaScript developer? Questions that can distinguish if someone is not an ad-hoc JavaScript programmer, but is really doing professional JavaScript development, object-oriented, reusable, and maintainable. Please provide answers, so an intermediate and ad-hoc JavaScript programmers can interview someone more experienced, coming up with answers to quite few of those advanced questions will elude me. Please avoid open questions. Please keep one interview question/answer per SO answer for better reading experience and easier interview preparation. It's possible duplicate, but there only questions and no answers (mostly): Advanced JavaScript Interview Questions What questions should every good JavaScript developer be able to answer?

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• Programmer productivity by programming language?

  - by Jason Baker

  In code complete, there's a nice table listing how productive a programmer is depending on language. Jeff Atwood has a nice blog post about it. This chart is at least 4 years old by now. I'm curious: have there been any more recent studies done on this? (insert standard anti-flamewar boilerplate here... we're all adults) Update: I appreciate everyone's opinions on the subject and whether or not this is a relevant question or not. But that's not really what I'm asking for. I'm wanting any studies on the subject. I'm inclined to agree with most of the opinions posted thus far, but I'd like to see if there's any research to back that up. And I'm also aware that choice of programming language is a complicated subject that depends on other factors like developer familiarity. To me, this is all the more reason to have these kinds of discussions backed by research. Also, thanks for the link, Robert Gamble.

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