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• I'm looking for websites with programming problems that I can practice [on hold]

  - by Spentak

  I want to become a more skilled programmer. I also want to do it through Objective-C and iOS. What websites or programs that you know of have problems that I can solve (with the answers)? I have failed some programming tests for jobs (such as "Given 2 values in a Binary Tree - how do you find the lowest common ancestor?) and I want to become a better engineer. I have developed 54 iOS/Android apps to date, but my core CS Skills apparently are rusty/bad. I have looked at TopCoder - but there aren't very many competitions going on, the website is terrible, and there does not appear to be anything that really supports Objective-C/iOS Websites?

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• choose append to existing backup instead of overwrite

  - by aron

  Hello, I have a database and I made it's first backup 2 days ago. Then yesterday I spent an entire adding new records. This morning I ran a backup, (but I selected append to existing backup set) as pictured below. I just ran a restore and I found that it wiped out all my data from yesterday and it restored it from the backup of 2 days ago. Not the version from this mornings backup. I zipped this backup file to be safe. I changed some data in the DB, Then I ran the back up again, but this time I selected "overwrite all existing backup sets" Now when I restore the db it's seems to restore the data from the backup correctly. I think I learned a lesson here, correctly if I'm wrong My questions is, Did I lose an entire day of work? I still have this morning's backup .bak file safe in a zip. Is there anyway I can restore is with the right data?

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• Master Typing Productivity when Programming/SysAdmin [closed]

  - by Hartator

  I try to learn how to type fast and have managed to learn a lot. I am quite good at typing english text now. I do a lot of programmation though and if QWERTY seems fitted for english text, it doesn't seem fitted to type Ruby, Python, Javascript, Command Line or C++... I have read plenty of articles and if I respect their guidelines/tips, I am using a lot my right pinky specially to type []{}|\;:'"/?=+ enter delete. As you can see this symbols are the ones which are the most used when you are programming and we are using only one weak finger to reach them. Am I learning wrong? Is there is a way to be more productive? (I don't really want to switch to DVORAK) Have you some experiences/tips to share regarding this issue? Original Post : http://stackoverflow.com/questions/12230373/programmer-typing-productivty

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• How to represent a Many-To-Many relationship in XML or other simple file format?

  - by CSharperWithJava

  I have a list management appliaction that stores its data in a many-to-many relationship database. I.E. A note can be in any number of lists, and a list can have any number of notes. I also can export this data to and XML file and import it in another instance of my app for sharing lists between users. However, this is based on a legacy system where the list to note relationship was one-to-many (ideal for XML). Now a note that is in multiple lists is esentially split into two identical rows in the DB and all relation between them is lost. Question: How can I represent this many-to-many relationship in a simple, standard file format? (Preferably XML to maintain backwards compatibility)

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• Watch syntax help

  - by Jason

  In my Systems Programming class, there are weekly programming experiments, and I'm having trouble with the current one. The objective is to write a C program that slowly writes a string of text to a file, metered by usleep() in a 100 count for loop. The goal of the experiment is to observe the file size buffer in action via the watch command. However, I can't get it to work using watch -d ./output What syntax do I need for the watch command to see the changes made to the file size?

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• What is "egoless programming"?

  - by Bob Murphy

  I first heard this term about fifteen years ago. My understanding is similar to that described in the Wikipedia article and a TechRepublic article: you work with your colleagues in a "friendly, collegiate way in which personal feelings are put aside". It includes things like doing peer reviews with mutual respect and a desire to learn, and not feeling like you "own" code, so if somebody has a suggestion or says there's a bug or needs to change it, you don't get defensive about it. I've also thought it was largely about having an attitude that makes for good relations with other programmers with the goal of improving the code. So I haven't seen it as being incompatible with taking pride in the quality of your work or feeling regret if something you did caused your customer a problem. However, an answer to a recent question makes me think some other programmers have different understandings about "egoless programming". So what is the correct definition? And what are its implications?

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• Best datastructure for this relationship...

  - by Travis

  I have a question about database 'style'. I need a method of storing user accounts. Some users "own" other user accounts (sub-accounts). However not all user accounts are owned, just some. Is it best to represent this using a table structure like so... TABLE accounts ( ID ownerID -> ID name ) ...even though there will be some NULL values in the ownerID column for accounts that do not have an owner. Or would it be stylistically preferable to have two tables, like so. TABLE accounts ( ID name ) TABLE ownedAccounts ( accountID -> accounts(ID) ownerID -> accounts(ID) ) Thanks for the advice.

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• Books about Windows Os Programming [closed]

  - by LostInLib

  I'm trying to develop a desktop application which is similar to CCleaner. But I'm having problems with R&D resources... I can't find good books about Windows Operating System Programming Topic Examples; Explaining Windows 7 (or even 8) registry. Which registry entry turn on/off "showing desktop icons" Or, What is Windows registry defrag?, How can you defrag registry?, How can you optimize windows startup for( Windows 7 ) etc. I googled my questions, find msdn-some stackoverflow topics etc. But I can't find a book about low-level explaining current windows 7 operating system... What I'm missing ? Thanks for your any input... and sorry, I don't know is this the right place to ask that question, but I asked anyway...

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• Unique constraint on more than 10 columns

  - by tk

  I have a time-series simulation model which has more than 10 input variables. The number of distinct simulation instances would be more than 1 million, and each simulation instance generates a few output rows every day. To save the simulation result in a relational database, i designed tables like this. Table SimulationModel { simul_id : integer (primary key), input0 : string or numeric, input1 : string or numeric, ...} Table SimulationOutput { dt : DateTime (primary key), simul_id : integer (primary key), output0 : numeric, ...} My question is, is it fine to put an unique constraint on all of the input columns of SimulationModel table? If it is not a good idea, then what kind of other options do i have to make sure each model is unique?

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• How to find foreign-key dependencies pointing to one record in Oracle?

  - by daveslab

  Hi folks, I have a very large Oracle database, with many many tables and millions of rows. I need to delete one of them, but want to make sure that dropping it will not break any other dependent rows that point to it as a foreign key record. Is there a way to get a list of all the other records, or at least table schemas, that point to this row? I know that I could just try to delete it myself, and catch the exception, but I won't be running the script myself and need it to run clean the first time through. I have the tools SQL Developer from Oracle, and PL/SQL Developer from AllRoundAutomations at my disposal. Thanks in advance!

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• Should I Split Tables Relevant to X Module Into Different DB? Mysql

  - by Michael Robinson

  I've inherited a rather large and somewhat messy codebase, and have been tasked with making it faster, less noodly and generally better. Currently we use one big database to hold all data for all aspects of the site. As we need to plan for significant growth in the future, I'm considering splitting tables relevant to specific sections of the site into different databases, so if/when one gets too large for one server I can more easily migrate some user data to different mysql servers while retaining overall integrity. I would still need to use joins on some tables across the new databases. Is this a normal thing to do? Would I incur a performance hit because of this?

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• News about Programming Entity Framework 2nd Edition

  Programming Entity Framework 2nd Edition (based on the RTM of VS2010/.NET 4.0) is currently available on Safari Rough Cuts at http://oreilly.com/catalog/9780596807252. At this point most of the chapters are there. You’ll find 2-23. Note that chapter 4 will be broken into 4 and 5 in the final edition. I changed the chapter numbering after chapter 16 to accommodate this which is why there is no chapter 17. Chapters 24 is about n-Tier CLient applications using an WPF example and chapter 25 is...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Anti-depressant and programming

  - by user12358

  I wanted to ask your opinion on anti-depressants, since I took them daily for 3 years now, but I can't be sure if I'm less perfomant with them or without, since I never withdrawed. I'm still at school at the age of 25, still having some motivation problems (for example I can't get used to do something at school if I don't think it will teach me something), but I'm quite motivated to work in the video-game field, since I have some personnal projects in mind. I know C++ programming etc, I'm still learning techniques, but do you think I should try more to do my project instead of just following the work I'm assigned to ? Have you had experience with depression or anti-depressants ? How did it affect your work ? Do you think that being depressed or half-depressed can improve creativity ?

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• How should I build a simple database package for my python application?

  - by Carson Myers

  I'm building a database library for my application using sqlite3 as the base. I want to structure it like so: db/ __init__.py users.py blah.py etc.py So I would do this in Python: import db db.users.create('username', 'password') I'm suffering analysis paralysis (oh no!) about how to handle the database connection. I don't really want to use classes in these modules, it doesn't really seem appropriate to be able to create a bunch of "users" objects that can all manipulate the same database in the same ways -- so inheriting a connection is a no-go. Should I have one global connection to the database that all the modules use, and then put this in each module: #users.py from db_stuff import connection Or should I create a new connection for each module and keep that alive? Or should I create a new connection for every transaction? How are these database connections supposed to be used? The same goes for cursor objects: Do I create a new cursor for each transaction? Create just one for each database connection?

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• Programming Language Family Tree?

  - by user134353

  As a man interested in programming, I must ask if there is a cataloged hierarchy of languages. I'd like to learn to actually understand what's happening- that is to say, I don't want to use a compiler until I understand what a compiler does and how to make my own. I really do want to start from total scratch. I'm told that means "machine code"? I don't know. What I do know is that "C++" is not the start. I'm not interested in learning that until I can actually break software down to its very base and see how the pieces go together.

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• Programming vs Planning

  - by MattW

  Recently I have been tasked with more High level planning assignments due to the lead developer of my team leaving. I hate long term planning. My brain just doesn't naturally seem wired for it and I am not interested enough in it to spend the time to learn it (it is hard enough to keep up with the programming side of the picture). Can I still be a good programmer without being a high level planer too? Are you expected to be good at planning out the entire product and picking a date, as part of being a senior programmer. Is it possible to be a good programmer and not a high level planner?

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• Is programming a SubCulture? [closed]

  - by Trufa

  I was going through this article: http://en.wikipedia.org/wiki/Subculture Which got mee thinking is programming a subculture? After the a while I started thinking it really hard, and if you go really in depth this is a very complex and interesting question to ask. YOu can even ask yourself if (heavy) internet (social) users are an subculture and programmers a culture within. I think it might be an interesting discussion, hope you like it! NOTE: I linked the wiki article because it might be a good baseline, maybe you can base you answer on Ken Gelder´s proposal to distinguish subcultures. But it should be based on a little bit more that intuition. Thanks in advance! Trufa

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• O'Reilly Deal of the day - 5/JSep/2012 - Programming Windows 8 Applications with C#

  - by TATWORTH

  Today's deal of the day from O'Reilly at http://shop.oreilly.com/product/0636920024200.do?code=DEAL is Programming Windows 8 Applications with C# ."With Early Release e-books, you get books in their earliest form — the author's raw and unedited content as he or she writes — so you can take advantage of these technologies long before the official release of these titles. You'll also receive updates when significant changes are made, new chapters as they're written, and the final e-book bundle. If you want to build Windows 8 applications for desktops and the forthcoming Microsoft Surface tablet PC, this book will show you how to work with the Metro design language and the Windows RT operating system. You’ll learn this new landscape step-by-step, including the minute system details and design specifications necessary to innovate and build a variety of Windows 8 apps. It’s ideal for .NET developers who use C#."

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• Options for storing large text blobs in/with an SQL database?

  - by kdt

  Hi, I have some large volumes of text (log files) which may be very large (up to gigabytes). They are associated with entities which I'm storing in a database, and I'm trying to figure out whether I should store them within the SQL database, or in external files. It seems like in-database storage may be limited to 4GB for LONGTEXT fields in MySQL, and presumably other DBs have similar limits. Also, storing in the database presumably precludes any kind of seeking when viewing this data -- I'd have to load the full length of the data to render any part of it, right? So it seems like I'm leaning towards storing this data out-of-DB: are my misgivings about storing large blobs in the database valid, and if I'm going to store them out of the database then are there any frameworks/libraries to help with that? (I'm working in python but am interested in technologies in other languages too)

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• Programming Language for RF scanner [closed]

  - by Sid

  I am a Software Developer mostly on Windows System. I have been tasked to create an App Program for an RF Barcode Scanner. Which I don't have any experience in this kind of software. I am open to learn new Programming Languages to develop the software for this barcode scanner. From which I see on our meeting. It uses Windows or Windows Mobile as OS. Can someone direct me to a tut site or just tell me what language I should use? Requirements is mostly, Log In, UI Entry of Details + Barcode, Process Button. Connection To SQL Server via Wifi Access Point to call the procedure afterwards. I am not developing a Barcode scanner, I am developing a UI Software like a Mobile App. I tried to google but I dont know what exact keywords I should search for. My question is, what PL is mostly used to develop this kind of softwares.

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• Monitor screen size and programming ease

  - by rrazd

  I recently heard that a big part in successful/quick debugging and easing the process of programming is to use a big screen. I may be purchasing a new computer in the future and this has me wondering: 1)Is the aforementioned statement actually true or is it a bit of a stretch? 2)Have you noticed that this plays a significant enough part to buy a bigger screen if the bigger screen is significantly more expensive? 3)Is it common for developers to work on 13'' laptop screen as their main (and only) workstation (this is what I currently develop on) or is this actually disadvantageous? This may be subjective but any professional opinions/experiences would be greatly appreciated!

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• Three customer addresses in one table or in separate tables?

  - by DR

  In my application I have a Customer class and an Address class. The Customer class has three instances of the Address class: customerAddress, deliveryAddress, invoiceAddress. Whats the best way to reflect this structure in a database? The straightforward way would be a customer table and a separate address table. A more denormalized way would be just a customer table with columns for every address (Example for "street": customer_street, delivery_street, invoice_street) What are your experiences with that? Are there any advantages and disadvantages of these approaches?

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• how to design a db like Facebook where users can update their status and of the fb page as admin

  - by Harsha M V

  i am designing a database where users can update status messages of theirs and they can create pages groups like facebook fan page and post status like the admin of the page and not as a user. user(id, name..) group(id, name...) group_admin(group_id, user_id) this is my set up. Is this the way to do it. How to post under the group as an admin. will i need to make a check to every user if he is the admin or not ?

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• SQL Server: Log file grows more and more, and do not get merged with the MDF file

  - by SDReyes

  My database files look very suspicious. we are using the DB in a production stage. and I'm seeing how the LDF file grows more and more. while the MDF file seems as it is not growing at all (I don't have a file size history to demonstrate it, but I think it is not doing it!! I bet!) So I guess what could be happening? How could I force the merge to the MDF?

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• Road to advanced Programming [closed]

  - by Srivalli Chitrapu

  I am currently working as an SDET(Software devlopment Engineer in Test). I have been doing some programming in C# as my job needs. I want to expand my knowledge and experience by creating some simple tools and applications of my own. Consider this like academic projects that are created by students at the end of their course . The idea is to have a practical knowledge on the subjects that I have a theoritical knowledge about. For Eg - I have read about multithreading and have worked on the examples but I do not have a grip over the concepts. In order to get a good grip over the concepts I want to work over some projects involving multithreading, starting with a simple one. Similarly other concepts like REST/SOAP web services using WCF. How should I design a curriculum for my self to go about learning these concepts/ technologies and creating some projects of my own. Thanks, Srivalli

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