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• I just recursively chmod'd everything under / to 750. Any tips?

  - by Ouairz

  I won't be the first and I won't be the last, I suppose. While playing around with the find command, I made a whoops and it would appear that instead of changing the permissions of the ~/web directory to 750, it changed the permissions of the entire filesystem (/) to 750, however I'm not certain, but any attempt to investigate is thwarted by Permission denied messages. For everything. This was the offending command: sudo find ~/web . type d -exec chmod 750 {} If I'm not mistaken, the Ubuntu team disabled root logins as a safety precaution so I'm out of ideas. I'm (obviously) a total newbie when it comes to file permissions so I was wondering if anyone had some good or even some bad advice to share. I've mentally prepped myself to losing everything on the computer which is only of mild consequence, since I have backups, but I did do a bit of work on this box over the week and it would be a shame to lose it all due to a boneheaded mistake. If you are reading this message, ask yourself, have you backed up any of your work recently? Thanks in advance for any insights. Feel free to scold me for using sudo carelessly

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• Ad Service That Lets You Choose Your Ad, and Then Some [on hold]

  - by user3634450

  I'm trying to build an app for both Android and/or iOS where part of the gameplay actually involves ads as a texture. I need to be able to choose which ads I would like to use. I need to be able to be able to identify the ads (which if I can choose which ads show up in the app shouldn't be that hard). I need to be able to swap in and out new ads on what could possibly be a daily basis (and don't want to have to update the app to do it). And as if that wasn't too needy a list, I need to be able to load 50 ads from the pool of ads I deem fit, all to each and every user of the app at least every couple of days. I don't care if the ads pay, I'm not looking for clicks, but I don't want to have to make 50 fake ads every couple of days, from an "artistic" level I don't want the content to feel phony or fake, and I don't really have a way to load content to each user via some internet source (if anyone could name one that would be great). I'm not sure what kind of ad provider would like or even approve of this, in fact just what I've described might be against Google Play's or iTunes' content developer policies, but if anyone could give me any advice to steer me in the right direction it would be greatly appreciated, thank you.

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• X won't start, root filesystem mounted read only

  - by TK Kocheran

  I just experienced a very strange and puzzling problem on my machine that I can't seem to get sorted out. I was running Windows on a second partition, and everything was working great. I then went to restart into Linux, and noticed that X wouldn't start. Everything was displayed in super-low resolution, so I tried reinstalling my NVIDIA driver. I started seeing all of these I/O error problems, so I figured that my SSD was bad. After a bit more playing around, I ran fsck on the drive when mounted from a startup disk as well as badsectors and everything looked great. The SMART drive tests all passed and again, everything was looking good, so I rebooted again and still, no joy. I started then getting some weird USB errors, so I followed someone's advice and unplugged my computer's power supply, then started back up again and my graphics looked a lot better in the BIOS and in the boot logo, but X still wouldn't start. I then found out that my main boot drive was being mounted read-only for some reason. What's going wrong? I've done some pretty extensive tests on the SSD from a startup disk such as writing massive files, reading big files, running filesystem checks on the entire disk, and everything is looking great, until I try to boot. Whenever I try installing the drivers with apt-get, I get a ton of ata error messages looking like this: How can I diagnose what's going wrong and fix it so I can get back to work?

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• SEO: Getting site to show in location-specific searches

  - by willvv

  I'm really new to this SEO world and I've been reading a lot to try and figure it out. We have a site moodbond.com that allows users to browse/create events anywhere. And we fill it with content from the main cities in the US. We would like it to show for searches for things like "events in san francisco" or "what to do in new york", however, since the site is not really location-specific, I'm not really sure where to begin. I've been thinking a couple of things, maybe you can help me decide if these would be a good way to start or if I should try something different. 1- Allow something like location-specific urls (e.g. moodbond.com/browse/san-francisco) could just show the main page centered in San Francisco. 2- Change the headers/title of the page so it adapts automatically to the city being browsed (and change this dynamically as the user changes the location of the map). 3- Add internal links to different locations (e.g. add a link at the footer of the page that says "Events in Seattle" that makes the site load events in that city. (this would probably depend on implementing #1). What do you guys think? will any of these really help or should I look for a different approach? any advice is welcome. Thanks

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• Need Help Hiring a Perfectionist Programmer [closed]

  - by Bryan Hadaway

  I understand my question may be in the gray area, but I'm not able to use the Meta to ask if this question is appropriate or not so I'll simply have to risk it. My project is complete in the sense that it's a fully functional, ready to go 1.0 version. However, that's not good enough for my standards. My expertise is in HTML/CSS, not jQuery and PHP. I'm looking for someone to refine every character of my code for quality, speed, security and compatibility. I want everything to be as bug free as possible for launch. So I need an expert programmer who's a perfectionist in their coding who cares about the quality of their work (not just making it work) to review and refine my code. I'm sure I can't outright post the project's details and hope for interested parties to contact me as that wouldn't be beneficial to the community so instead I'm looking for advice from programmers about where some of best places to hire quality programmers are and the best strategies to hire the right programmer. In other words, screening applicants off of craigslist isn't going to cut it for this project. Thanks

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• EE vs Computer Science: Effect on Developers' Approaches, Styles?

  - by DarenW

  Are there any systematic differences between software developers (sw engineers, architect, whatever job title) with an electronics or other engineering background, compared to those who entered the profession through computer science? By electronics background, I mean an EE degree, or a self-taught electronics tinkerer, other types of engineers and experimental physicists. I'm wondering if coming into the software-making professions from a strong knowledge of flip flops, tristate buffers, clock edge rise times and so forth, usually leads to a distinct approach to problems, mindsets, or superior skills at certain specialties and lack of skills at others, when compared to the computer science types who are full of concepts like abstract data types, object orientation, database normalization, who speak of "closures" in programming languages - things that make little sense to the soldering iron crowd until they learn enough programming. The real world, I'm sure, offers a wild range of individual exceptions, but for the most part, can you say there are overall differences? Would these have hiring implications e.g. (to make up something) "never hire an electron wrangler to do database design"? Could knowing about any differences help job seekers find something appropriate more effectively? Or provide enlightenment or some practical advice for those who find themselves misfits in a particular job role? (Btw, I've never taken any computer science classes; my impression of exactly what they cover is fuzzy. I'm an electronics/physics/art type, myself.)

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• Should I sell video tutorials on my own or via publishers like lynda.com? [closed]

  - by Derfder

  I am asking this because I am deciding between two models right now. One way is to create video tutorials on my own (make some short free videos and long pay per download/stream videos) or sell them to lynda.com or tutsplus. The 2nd way is easier, because they will do all the boring business stuff, will host the files to download etc. In that case, everything I need is a good microphone and obey their guidelines. On the other side if I do it on my own, I have to do all the unwanted business stuff, pay the server and other stuff. This is quite a big downside, however, I will have all the videos under my control in the future. I know that lynda.com has bigger attention and marketing that I am capable, but if you take e.g. phpvideotutrials.com (r.i.p ;), I think Leigh was very successful with relatively small budget. The interesting question will be the cost or how much will they pay me. Would it be less than if I sell it myself+monthly server hosting+other expenses? Any advice from people who actively sell their videos to some companies or do it on they own is highly appreciated.

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• send music to upnp device from PC

  - by markrich

  I have a new Arcam AirDAC (http://www.arcam.co.uk/products,rSer...ACs,airDAC.htm) attached to my stereo which has upnp support. I would like to send audio from my 14.04 PC to the box itself and to this end installed Rygel upon my system to help but it hasn't. I have created a new sound device in PulseAudioPreferences and selected it from inidcator-sound-switcher but here I become stuck. The sound is heading to the new sound device as the volume can be seen to go up and down from PulseAudioVolumeControl but no sound comes from the stereo downstairs. The problem, as I see it, is the new device has no idea where to send the music as the Arcam hasn't been chosen from any program. So - I installed BubbleUPNP and Plex. My music has been imported into the later and the former can see both the Arcam as a Renderer and the Plex as the Media Server. Installing the BubbleUPNP program on my Android tablet allowed me to send music and all seemed good UNTIL I started playing AIFF and ALAC music and it all stopped. No suitable decoding device. So that scuppered that route. So here I am and stuck. How can I tell Ubuntu to use the Arcam as a renderer to play music through when the albums are played from Rhytmnbox, Tomahawk, Clementine or other? Clementine would be my preferred client as there is a usable remote control program for the tablet. Can anyone help me fix this or advice another way to do what I would like?

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• Setting up group disk quotas

  - by Ray

  I am hoping to get some advice in setting up disk quotas. So, I know about: Adding usrquota and grpquota on to /etc/fstab for the file systems that need to be managed. Using edquota to assign disk quotas to users. However, I need to do the last step for multiple users and edquota seems to be a bit troublesome. One solution that I have found is that I can do: sudo edquota -u foo -p bar. This will copy the disk quota of bar to user foo. I was wondering if this is the best solution? I tried setting up group disk quotas but they don't seem to be working. Are group quotas meant to help in the assignment of the same quota to multiple users? Or are they suppose to give a total limit to a set of users? For example, if users A, B, C are in group X then assigning a quota of 20 GB gives each user 20 GB or does it give 20 GB to the entire group X to divide up? I'm interested in doing the former, but not the latter. Right now, I've assigned group disk quotas and they aren't working. So, I guess it is due to my misunderstanding of group disk quotas... My problem is I want to easily give the same quota to multiple users; any suggestions on the best way to do this out of what I've tried above or anything else I may not have thought of? Thank you!

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• What are some techniques I can use to refactor Object Oriented code into Functional code?

  - by tieTYT

  I've spent about 20-40 hours developing part of a game using JavaScript and HTML5 canvas. When I started I had no idea what I was doing. So it started as a proof of concept and is coming along nicely now, but it has no automated tests. The game is starting to become complex enough that it could benefit from some automated testing, but it seems tough to do because the code depends on mutating global state. I'd like to refactor the whole thing using Underscore.js, a functional programming library for JavaScript. Part of me thinks I should just start from scratch using a Functional Programming style and testing. But, I think refactoring the imperative code into declarative code might be a better learning experience and a safer way to get to my current state of functionality. Problem is, I know what I want my code to look like in the end, but I don't know how to turn my current code into it. I'm hoping some people here could give me some tips a la the Refactoring book and Working Effectively With Legacy Code. For example, as a first step I'm thinking about "banning" global state. Take every function that uses a global variable and pass it in as a parameter instead. Next step may be to "ban" mutation, and to always return a new object. Any advice would be appreciated. I've never taken OO code and refactored it into Functional code before.

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• Computer suddenly won't boot - stops at a flashing prompt

  - by Dave M G

  I have been running Ubuntu on my computer for a long time, and I have been using 11.10 since it became available in October. Suddenly, this morning, when I rebooted, the computer would not reach the log in screen. I go through the standard POST boot sequence, and I also get a splash screen for my Nvidia graphics card, so at least most of the hardware seems to be working. After that, all I get is a flashing text prompt - one blinking white underline character on a screen that is otherwise completely blank. I don't think it is even reaching GRUB. No key input is possible. I have tried various key combinations to try and initiate some kind of interface, be it command line or anything else. The only key combination that works is [CTRL]+[ALT]+[Delete] to reboot. I realize this is likely to be a hardware problem, but it could be an Ubuntu problem(?), so I'm hoping for a specific set of troubleshooting steps so I can diagnose and repair this issue. My current suspicion is that one of the drives in my 2 disk software RAID has failed (even though they should be too new for that). However, this computer is critical to my work, so I'd like to invite advice on any possibilities so as to waste as little time as possible in fixing this machine.

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• Does it make sense to write tests for legacy code when there is no time for a complete refactoring?

  - by is4

  I usually try to follow the advice of the book Working Effectively with Legacy Code. I break dependencies, move parts of the code to @VisibleForTesting public static methods and to new classes to make the code (or at least some part of it) testable. And I write tests to make sure that I don't break anything when I'm modifying or adding new functions. A colleague says that I shouldn't do this. His reasoning: The original code might not work properly in the first place. And writing tests for it makes future fixes and modifications harder since devs have to understand and modify the tests too. If it's GUI code with some logic (~12 lines, 2-3 if/else block, for example), a test isn't worth the trouble since the code is too trivial to begin with. Similar bad patterns could exist in other parts of the codebase, too (which I haven't seen yet, I'm rather new); it will be easier to clean them all up in one big refactoring. Extracting out logic could undermine this future possibility. Should I avoid extracting out testable parts and writing tests if we don't have time for complete refactoring? Is there any disadvantage to this that I should consider?

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• Should I be learning Linq, Direct SQL Commands (in .net), EF or other?

  - by Wil

  Basically, I have a very good knowledge of plain old SQL coming from Classic ASP programming. Over the past couple of months, I have been learning C# and today was my first full day at MVC 3 (Razor) which I am loving! I need to get back in to Databases and I know that writing SqlCommand everywhere is obviously outdated (although it is nice I can still do it!). I used to go to a great usergroup as an IT Pro and the developer stuff went completely over my head, however I do remember a few things which kept coming up such as LINQ... However, that was some time ago and now the same people on Twitter are saying how out dated it is. I have tried to do research on both and I am clueless as to what direction I should go in, or when to use one over another (if learning both is a good thing). I am more so confused as I thought EF was a part of the .Net Framework, however, reading through the quick start guide, I had to download a component using Nuget. ... Basically I am out of my depth here and just need some honest advice of where to go!

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• Is learning C# as a first language a mistake?

  - by JuniorDeveloper1208

  I know there are similar questions on here, which I've read, but I recently read this post by Joel Spolsky: How can I teach a bright person, with no programming experience, how to program? And it got me thinking about my way of learning and whether it might actually be harmful in the long run. I've dabbled with various languages but C# is my first serious one, I've read "Head First C#" and created a few projects. But after reading the post above I've found it a bit disheartening that I may be going about it all wrong, obviously I respect Joel's opinion which is what has thrown me a bit. I've started reading "Code" as recommended in the reading list and I'm finding it pretty hard going, although enjoyable. I feel like it's taken the shine off of my "noobish hacking about" in Visual Studio. So now I'm unsure as to what path I should take? Should I take a step back and follow Joel's advice and start reading? I guess my main aim is just to become a good programmer, like everyone else, but I don't want to be going into bad practice by learning a .NET language when someone who's opinion I respect thinks that it is harmful. Thoughts?

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• Windows Defender Update KB915597 (Definition 1.135.415.0)? Killed My Live Discs

  - by user88311

  Here's my problem, for those willing to read for about 2 minutes here's the entire story, http://answers.microsoft.com/en-us/windows/forum/windows_vista-windows_update/bsod-after-windows-defender-update-kb915597/a4b5fca3-0274-47b4-97c4-61b34c4c4599, for those who want the short version here's what happened. After windows update automatically updated windows defender to kb915597, my computer starting getting bsods on shut down and start up and started experiencing problems withe the usb ports. So I decided to go to the microsoft answers site for help, I know that was probably my first mistake, so I followed their advice and they turned my computer into a large paper weight. Luckily I make physical backups of my c drive every few months and I have one from back in july, so I figured I'd boot up a ubuntu live disc, copy all my files from the past 2 months to a external drive and just copy the backup back to the c drive, that's where I ran into this problem. When I put in either a ubuntu or kubuntu disc, everything goes well, until it finishes the loading bar then when the OS would presumably start up, the computer resets, I've tried with ubuntu, kubuntu and gparted, and only gparted is able to get to the point where it starts up, but even then when I try to access the internet from it, the computer resets, and when I tried to copy the entire C drive partition to a blank external I wasn't able to. So I figured somehow maybe the C drive had something to do with it, so I unplugged the C drive so my computer was just a 2.8 ghz processor and 2 gigs of ram, should have had no problem starting a live disc but the problem still continues. After doing some googling around I've found whenever windows gets a update with the title KB915597 it's pretty much the kill switch for windows, I've tried contacting microsoft tech support and even managed to directly contact a software engineer but as soon as I mention KB915597 they all just blew me off. I hope anybody who reads this has any idea how to fix this, I'm going to attempt to install ubuntu or kubuntu to a external drive using the same computer and see what happens now.

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• Printer Canon MP540 succesfully added finally but doesn't print? (Attached Debug log)

  - by NES

  i tried to setup my printer in Ubuntu 10.10. I had to use special guide to install because Canon used libcupsys2 in its packages and ubuntu expects libscupsys i followed this guide in reference to this advice. The first problem was this one (the ubuntu "add printer dialog asked for root credentials". The suggested workarout in Launchpad to create a root password worked. Now i added the printer. It's available for printing. Then i got an error message "cups insecure filter" which prevented me from printing. That could be solved by setting the need root rights in the /usr/lib/cups/filter/ directory. The error message disappeared after restarting cups service. Now it should work but it doesn't. The main problem is now, the printer seems to be proper setup but when i try to print a document, the printer icon appears for short time in gnomepanel. There's a printing job in Queue which got completed, but the printer doesn't print. I attached the Debuglog provided by printer error control, had to upload to another site, since it was to big in the question body here. Perhaps someone can identify the problem with it? Note: i know that it once worked fine with an older release of Ubuntu, but not sure which version this was.

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• With Google Analytics, is it possible to check a specific page in Multi-Channel conversion attribution?

  - by Emmett R.

  I'm somewhat new to Google Analytics, and I'm trying to track all conversions that are assisted by a particular landing page, because I don't expect an instant purchase. I have e-commerce tracking set up. Due to the constraints of the associated ad campaign, I can't include the source/medium code in the url when people go to the landing page, and all of my traffic to the landing page is likely to be direct, so I'm not sure how to tell Multi-Channel marketing that it's a significant page. I know how to add events to a page, but I'm still figuring out what they can and cannot do. Would creating a redirect from the landing url to an identical url+source/medium code work? Any advice on how to accomplish this would be greatly appreciated. Tracking the final sale conversion is not the issue. Ecommerce reporting is functioning just fine on the site. I just want to report the landing page as an assist, whenever it shows up in the funnel, and I need to be able to do that across multiple visits.

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• What is the best book for the preparation of MCPD Exam 70-564 (Designing and Developing ASP.NET 3.5 Applications)?

  - by Steve Johnson

  Hi all, I have seen a couple of questions like this one and scanned through the answers but somehow the replies were not satisfactory or practical. So i wondered maybe people who have gone through it and may suggest a better approach for the preparation of this exam. Goal: My goal is actually NOT merely to pass that exam. I intend to actually master the skill. I have been into asp.net web development for approximately 1.5 years and I want to study something that really improves "Design and Development Skills" in Web Development in general and asp.net to be specific which i can put to use and build upon that. Please suggest a book that teaches professional Asp.Net design and development skills and approaches to quality development by taking through practice design scenarios and their solutions and through various case studies that involve design problems and their implemented solutions. Edit: I have found the Micorosoft training kits to be fairly interesting and helpful as these tend to increase knowledge. I have utilized a lot of things after getting a good explanation of things from the training kits. However, as far as Microsoft Training Kit for 70-564 is concerned, there are not a lot of good reviews about it. What i have read and searched on the net , the reviews on amazon and various forums, stack-exchange and experts-exchange, were more inclined to the conclusion that "Microsoft Training Kit for Exam 70-564 is not good. Its is not good as compared to other kits from Microsoft, like as compared to the training kit of Exam 70-562 or others." So i was looking for a proper book containing examples from practical world scenarios and case studies from which i can not only learn but also master the skills before wasting money of Microsoft Training Kit for Exam 70-564. Waiting for experts to provide a suitable advice.

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• Which iPhone ad API has produced the highest revenue for you?

  - by Kyle Humfeld

  This isn't a technical question, but more of a request for advice and empirical/anecdotal data. I'm nearly done writing a free app for iPhone, and I'm at the stage where I'm going to put ads into the app. I've had mixed success in the past with iAd (their fill rates have been atrocious recently, and their payouts have cut by about 75% over the past 4 months or so), and would like to know how much ad revenue you, the community, has seen from the various ad APIs you've used for your iPhone apps. This isn't a request for opinion, i.e. which is 'better', only what kinds of numbers you're seeing. I don't need absolute figures, but 'iAd pays x% higher than AdMob, and y% lower than AdSense' would be extremely helpful to me as I make my decision as to which ad API to integrate into my App. Also, have you had any experience or success with integrating multiple ad APIs into the same app? That's something I'm considering doing in my current iAd-filled apps (particularly my iPad app, which has yet to receive a single impression after nearly 60,000 requests)... something like: 1) Request-from-iAd 2) if that fails, request-from-adSense 3) if that fails, request-from-adMob 4) if that fails, ... etc.

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• How can I make this arcade-highscore game more fun/interesting?

  - by j-a

  I'm having difficulties getting the fun factor into this iPhone game, and I am looking for some ideas or advice. I was asked to generalize the question a bit. What are some techniques for arcade highscore games that can be applied to this game in order to: Make each second of the game fun and challenging, from the first second to the end of the game. Regardless of skill level. Make the player want to try again and again to beat the high score. Briefly about the game: you aim using your finger and pull the bow chord and release by lifting your finger. That part feels quite nice how the bow interacts with the finger. The game idea: hearts fall down and you get 1 pt for each heart you shoot. You start with a few arrows and every now and then a bag of arrow comes down which - if you hit it, you get more arrows. Once your out of arrows the game is over. So it is all about beating your previous high score or your friends high scores. Unfortunately I don't find it that fun. Thankful for any ideas/suggestions/thoughts on how to make it more fun/interesting.

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• public_html permissions for local development

  - by maGz

  I know this question has popped up a couple times, but I can't seem to find a definitive answer to my issue, so please bear with me. I have Ubuntu Server 12.04 setup in VirtualBox for PHP development and testing (Drupal plus other PHP sites using Yii framework). My question is in 3 parts... 1) If I create a public_html folder under /home/myuser, do I need to give ownership of that folder to the Apache www-data group? If so, are there any specific permissions I should be setting? 755? (Btw, I am following this guide to create the public_html directory and set up multiple virtual hosts per site I create and test) I previously had all of my sites under /var/www, but ran into massive permission denied errors whenever I tried to sFTP to it, either through FileZilla or PhpStorm. This is what I had previously done: sudo chgrp www-data /var/www sudo chmod -R 775 /var/www sudo chmod -R g+s /var/www sudo usermod -G www-data [my_ftp_user] 2) The second part of my question is this: If I create my PHP project and files in Windows through PhpStorm, and then upload via sFTP, will permissions get affected? 3) Once I am satisfied with my developed project, would it be advisable to move and test them under /var/www to see how it would fair in a production-ish environment? I would really appreciate the help and advice here. I'm learning more as I go along, but dealing with Linux files and permissions is a bit of a new ballgame for me! Thank you

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• Is looking for code examples constantly a sign of a bad developer?

  - by Newly Insecure

  I am a comp sci student with several years of experience in C and C++, and for the last few years I've been constantly working with Java/Objective C doing app dev and now I have switched to web dev and am mainly focused on ruby on rails and I came to the realization that (as with app dev, really) I reference other code wayyyy too much. I constantly google functionality for lots of things I imagine I should be able to do from scratch and it's really cracked my confidence a bit. Basic fundamentals are not an issue, I hate to use this as an example but I can run through javabat in both java/python at a sprint - obviously not an accomplishment and but what I mean to say is I have a strong base for the fundamentals I think? I know what I need to use typically but reference syntax constantly. Would love some advice and input on this, as it has been holding me back pretty solidly in terms of looking for work in this field even though I'm finishing my degree. My main reason for asking is not really about employment, but more that I don't want to be the only guy at a hackathon not hammering out nonstop code and sitting there with 20 google/github tabs open, and I have refrained from attending any due to a slight lack of confidence... Is a person a bad developer by constantly looking to code examples for moderate to complex tasks?

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• Why is Ubuntu unmounting my primary hard drive?

  - by Twisol

  I'm running Ubuntu 10.10 on my laptop (an Asus G73j), dual-booting Windows 7 if that matters. After using the computer for couple of hours or so, I get a popup complaining that a file was unmounted, then my GNOME desktop panels disappear. I can't save any unsaved work (the file browser shows "Filesystem" as totally empty), and other programs break in odd ways (like Chrome can't browse to any new pages, but keeps current ones going... at least I still have Pandora to listen to when this happens!). I've tried looking in the system logs to no avail; I'm assuming that it can't write any errors to the logs because, of course, the logs are on the primary hard drives. This started happening maybe a few days ago. Yesterday I upgraded from 10.4, but I believe it was happening before then. Any advice for figuring this out? EDIT: It just happened again, and I heard a small little clicky sound from the hard drive about five seconds before things went south. I'm thinking I should start backing up ASAP. In response to a comment, here's the dmesg output: http://askubuntu.pastebin.com/uYGshBay Also, the SMART status says the disk has a few bad sectors, and the detailed data says there are 14. It says it passed the self-assessment though. Lastly, this doesn't seem to be happening when I'm on Windows. I recently re-enabled ureadahead (which I disabled ages ago because it was causing Ubuntu to hang at the startup logo), could that be the source of the problem? I've disabled it again to see.

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• List<T>.AddRange is causing a brief Update/Draw delay

  - by Justin Skiles

  I have a list of entities which implement an ICollidable interface. This interface is used to resolve collisions between entities. My entities are thus: Players Enemies Projectiles Items Tiles On each game update (about 60 t/s), I am clearing the list and adding the current entities based on the game state. I am accomplishing this via: collidableEntities.Clear(); collidableEntities.AddRange(players); collidableEntities.AddRange(enemies); collidableEntities.AddRange(projectiles); collidableEntities.AddRange(items); collidableEntities.AddRange(camera.VisibleTiles); Everything works fine until I add the visible tiles to the list. The first ~1-2 seconds of running the game loop causes a visible hiccup that delays drawing (so I can see a jitter in the rendering). I can literally remove/add the line that adds the tiles and see the jitter occur and not occur, so I have narrowed it down to that line. My question is, why? The list of VisibleTiles is about 450-500 tiles, so it's really not that much data. Each tile contains a Texture2D (image) and a Vector2 (position) to determine what is rendered and where. I'm going to keep looking, but from the top of my head, I can't understand why only the first 1-2 seconds hiccups but is then smooth from there on out. Any advice is appreciated.

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• What are some good ways for an intermediate programmer to build skills?

  - by Jordan

  Preface: I work mostly in Python, and Web Dev languages (HTML, CSS, Javascript and Jquery, PHP) I'm proficient at coding but I want to get better. In larger more advanced projects my programming skills break down. The more code there is the more trouble I have fitting all the pieces together. I understand syntax well, and I can catch and correct errors fairly easier. But the more advanced it gets the more I struggle. I believe I have a good understand of the basic and nuts and bolts of programming and I understand what's going on, but when it comes to larger projects, especially ones with heavy math involved my confidence flags and I start making mistakes. It's not that I can't do it, I'm just not used to doing it. Does anyone have any advice for someone who knows programming, but wants to get better? The only tutorials I can really find are beginner basic type stuff. Basically what I'm saying is I want to be confident when I'm tackling advanced projects, but I can't because I have little experience dealing with difficult situations.

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