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  • What to choose API based server or Socket based server for data driven application

    - by Imdad
    I am working on a project which has a Desktop Application for MAC/COCOA, a native application for iPhone another native application in iPad. All the application do almost same thing. The applications are data driven applications. Every communication to server is made via a restful API developed in PHP. When a user logs in a lot of data is fetched from server. And to remain in sync with server pooling is done. As there are lot of data to pool it makes application slower and un-reliable. A possible solution that comes into my mind is to use Socket based server. My question is that will it reasonably improve the performance? And which technology (of sockets) will be good as a server side solution for data driven application? I have heard a lot about Node.js. Please give your suggestions.

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  • Using a SMTP Service for email

    - by Josh S.
    This may be a horribly obvious question, but I'm learning and just need someone to confirm it for me. I putting together a private social network that needs to email their members (through the social network software, Elgg) regularly. I'm hosting it on a shared HostGator plan (because they won't receive much traffic) and they'll email 10-1000 emails a few times a week. HostGator restricts you to 500 per hour. I'm also worried about deliverability. I've been searching up and down about how to throttle the emails so it will all send reliably... but then I came across the idea of an outside SMTP relay service. Would using an SMTP service resolve this issue? If so, any opinions on quality SMTP services?

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  • Size limit while using UICollectionView as tiled map for iOS game?

    - by Alexander Winn
    I'm working on a turn-based strategy game for iOS, (picture Civilization 2 as a template example), and I'm considering using a UICollectionView as my game map. Each cell would be a tile, and I could use the "didSelectCell" method to handle player interaction with each tile. Here's my question: I know that UICollectionViewCells are dequeued and reused by the OS, so does that mean that the map could support an effectively infinitely-large map, so long as only a few cells are onscreen at a time? However many cells were onscreen would be held in memory, and obviously the data source would take up some memory, but would my offscreen map be limited to a certain size or could it be enormous so long as the number of cells visible at any one time wasn't too much for the device to handle? Basically, is there any memory weight to offscreen cells, or do only visible cells have any impact? Also, does a UICollectionView seem like a bad idea for a game map, in a way I haven't thought of yet? It seems like it work well, but I haven't tried it yet so any thoughts are welcome.

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  • cannot use sudo on ubuntu server passwordless authentication?

    - by Lucas Crijns
    Hello I'm new at the forum and I want to introduce myself: I'm Lucas Crijns and I'm a very happy user of ubuntu server. I was reading about passwordless authentication with ssh. So I made a key and published it to ubuntu server, it worked well and I could login with my private key. But then I locked the account to prevent hacking from my password. After I ran "passwd -l lucas", I was not longer able by my next login to use sudo. Because it was asking for a password and I locked it. I was thinking that sudo would also be without a password. My question is now: is it possible to use sudo? And how can I enable it without a valid password for sudo? Thank you for your help!

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  • MySQL vs. SQL Server Go daddy, What is the difference bewteen hosted DB and App_Data Db

    - by Nate Gates
    I'm using Goddady for site hosting, and I'm currently using MySQL, because there are less limits on size,etc. My question is what is the difference between using a hosted Godaddy Db such as MySQL vs. creating a SQL Serverdatabase in the the App_Data folder? My guess is security? Would it be a bad idea to use a SQL ServerDB thats located in the App_Data folder? Additional Well I am able to create a .mdf (SQL Server DB file) in the App_Data folder, but I'm really unsure if should use that or not, If I did use it it would simplify using some of the Microsoft tools. Like I said my guess is that it would be less secure, but I don't really know. I know I have a 10gb, file system limit, so I'm assuming my db would have to share that space.

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  • Calculate an AABB for bone animated model

    - by Byte56
    I have a model that has its initial bounding box calculated by finding the maximum and minimum on the x, y and z axes. Producing a correct result like so: The vertices are then stored in a VBO and only altered with matrices for rotation and bone animation. Currently the bounds are not updated when the model is altered. So the animated and rotated model has bounds like so: (Maybe it's hard to tell, but the bounds are the same as before, and don't accurately represent the rotated/animated model) So my question is, how can I calculate the bounding box using the armature matrices and rotation/translation matrices for each model? Keep in mind the modified vertex data is not available because those calculations are performed on the GPU in the shader. The end result I want is to have an accurate AABB the represents the animated model for picking/basic collision checks.

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  • Broadcom STA driver doesn't work well with BCM4313

    - by Oli
    Following on from my other question about our new Samsung Q330, I've noticed that the wireless is incredibly flakey. It can connect but after a little use, especially if it does a lot of downloading at once (read: install something from the Software Centre), the connection stops working. Network Manager still see the connection, there's just no network throughput. I've simple tests like pinging other local network hosts and they just fail. The Samsung Q330 has a Broadcom BCM4313 wifi card (it's proper ID: 14e4:4727) and it's running on the Broadcom STA drivers that Jockey suggests (it didn't work at all without this). I did try installing b43-fwcutter but this just didn't do anything. I was expecting a configuration screen to come up (to select a firmware) but it never did. This page suggests the newer brcm80211 driver might be able to help, but I don't know how to install that. If you think this is the right route, please let me know how one goes about installing it.

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  • security cameras and Ubuntu

    - by Josh
    I am setting up a server of sorts and chose ubuntu for the OS as my dad has it on a few computers. I am unimpressed with Windows or MAC due to all the add-ons and complexity of it when all I want is something simple. The system will have 3 purposes, storing my wife's photography work (she is a professional photographer) storing music for quick access to our entertainment system (will be running the system thru the tv in our living room and thus though our surround sound) and will also serve as a DVR unit for a home security system I am going to put together. My question is what sort of software options are there for the Ubuntu system as far as a DVR with frame by frame playback. It does not need to be fancy but of course a variety of options are a nice touch.

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  • Is it possible to create a single tokenizer to parse this?

    - by Adrian
    This extends off this other Q&A thread, but is going into details that are out of scope from the original question. I am generating a parser that is to parse a context-sensitive grammar which can take in the following subset of symbols: ,, [, ], {, }, m/[a-zA-Z_][a-zA-Z_0-9]*/, m/[0-9]+/ The grammar can take in the following string { abc[1] }, } and parse it as ({, abc[1], }, }). Another example would be to take: { abc[1] [, } and parse it as ({, abc[1], [,, }). This is similar to the grammar used in Perl for the qw() syntax. The braces indicate that the contents are to be whitespace tokenized. A closing brace must be on its own to indicate the end of the whitespace tokenized group. Can this be done using a single lexer/tokenizer, or would it be necessary to have a separate tokenizer when parsing this group?

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  • library put in /usr/local/lib is not loaded

    - by IARI
    Let me state in advance: One might think this question would is for server fault, but I think is is Ubuntu (config) specific. In short: I have put libwkhtmltox.so in /usr/local/lib as stated in installation instructions linked below, but it appears the library is not loaded. I am trying to install php-wkhtmltox, a php extension for wkhtmltox on my local desktop (Ubuntu 12.04). I have extracted the source and changed to the corresponding directory. After running phpize, ./configure fails at checking for libwkhtmltox support... yes, shared not found configure: error: Please install libwkhtmltox I suspect the reason the library is not loaded is that the path is not checked!? how do I proceed? Here are instructions I followed: http://davidbomba.com/index.php/2011/08/04/php-wkhtmltox/ http://roundhere.net/journal/install-wkhtmltopdf-php-bindings/

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  • One method with many behaviours or many methods

    - by Krowar
    This question is quite general and not related to a specific language, but more to coding best practices. Recently, I've been developing a feature for my app that is requested in many cases with slightly different behaviours. This function send emails , but to different receivers, or with different texts according to the parameters. The method signature is something like public static sendMail (t_message message = null , t_user receiver = null , stream attachedPiece = null) And then there are many condition inside the method, like if(attachedPiece != null) { } I've made the choice to do it this way (with a single method) because it prevents me to rewrite the (nearly) same method 10 times, but I'm not sure that it's a good practice. What should I have done? Write 10 sendMail method with different parameters? Are there obvious pros and cons for these different ways of programming? Thanks a lot.

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  • Getting rid of getting stuck often [closed]

    - by Pankaj Upadhyay
    I have been working with C# and .NET for around 2-3 years. But, still i get stuck too often. My project includes few simple websites(asp.net) in the early parts and then a desktop application for cotton transaction management(wpf). And right now, I am building a price compare website (asp.net MVC). Along the lines, I have read quite few books on C# and .NET, but still I get stuck very often. What pisses me is that the problems I get stuck in aren't very typical or hard. You can get a better idea by visiting my questions page on SO. After looking at my question lists, do you also feel that my basis or knowledge as a programmer are weak ? If so, How can i find a remedy to this problem ? And How can I stop getting stuck too often for simpler problems.

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  • SQL SERVER Generate Report for Index Physical Statistics SSMS

    Few days ago, I wrote about SQL SERVER Out of the Box Activity and Performance Reports from SSSMS (Link). A user asked me a question regarding if we can use similar reports to get the detail about Indexes. Yes, it is possible to do the same. There are similar type of reports are [...]...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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  • Python as a first language?

    - by user64085
    I have just started working in Information Security World. I want to learn the Python language for creating my own automated tool for Fuzzing, SQL-Injection etc. My question is I don't know much about C language (only basic knowledge) but I want to learn directly Python Language so is it good? I have seen there is lots of difference between Python and C (obviously) and for Information Security field Python = GOD so I want to know learning Python need any experience on C language? If not so can I start learning Python directly?

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  • How do you go about training a replacement?

    - by SnOrfus
    I recently asked about leaving a position and got a lot of great answers. One of the common threads was that being around to train the new person would be expected and could go a long way. Now considering that (I think) most people don't stay at a company for a long time after they've given notice, and it will take time for the company to interview/hire one - that leaves for a short amount of time to get someone up to speed. I've also never trained anyone before. I did a bunch of tutoring in University and College, but teaching a language/technology is far different from training someone to replace you on your job. So the question is: how do you go about training someone to replace you in a, potentially, short amount of time?

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  • modifying openssl library code

    - by Nouar Ismail
    I am ordered to check the availability to customize an encryption algorithm the IPsec protocol use in Ubuntu, if anyone have any suggestion about this point?. I've read that the encryption operation occur in libcrypto in openssl. when I tried to compile and install OpenSSL from source ..I had everything ok with the installation, but when to check the version installed on the system, with "dpkg -s openssl", it didn't seem that it's the version i had already installed, maybe it had been installed successfully, but the question is: would it be the version the system use for encryption operations? would it overwrite the old version? and would my changes in code have effects ? any help please? thank you in advance.

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  • Mount an image created from ddrescue

    - by oshirowanen
    I know this question has been asked before, but following those answers does not seem to work for me. I have created an image of a USB stick this is on my laptop harddrive. How do I mount this image? The command I used to create the image was: ddrescue --no-split /dev/sdb usb_recovered usb_recovery_log What am I supposed to do next? Mount it? Fix it then mount it? Mount it then fix it? And how? UPDATE: What I want to recover are the files in the image. How? I don't know as I have tried testdisk and it can't find partitions, and I have tried fdisk and it can't find a partition table in the image either.

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  • Community Branching

    - by Dane Morgridge
    As some may have noticed, I have taken a liking to Ruby (and Rails in particular) quite a bit recently. This last weekend I spoke at the NYC Code Camp on a comparison of ASP.NET and Rails as well as an intro to Entity Framework talk.  I am speaking at RubyNation in April and have submitted to other ruby conferences around the area and I am also doing a Rails and MongoDB talk at the Philly Code Camp in April. Before you start to think this is my "I'm leaving .NET post", which it isn't so I need to clarify. I am not, nor do I intend to any time in the near future plan on abandoning .NET.  I am simply branching out into another community based on a development technology that I very much enjoy.  If you look at my twitter bio, you will see that I am into Entity Framework, Ruby on Rails, C++ and ASP.NET MVC, and not necessarily in that order.  I know you're probably thinking to your self that I am crazy, which is probably true on several levels (especially the C++ part). I was actually crazy enough at the NYC Code Camp to show up wearing a Linux t-shirt, presenting with my MacBook Pro on Entity Framework, ASP.NET MVC and Rails. (I did get pelted in the head with candy by Rachel Appel for it though) At all of the code camps I am submitting to this year, i will be submitting sessions on likely all four topics, and some sessions will be a combination of 2 or more.  For example, my "ASP.NET MVC: A Gateway To Rails?" talk touches ASP.NET MVC, Entity Framework Code First and Rails. Simply put (and I talk about this in my MVC & Rails talk) is that learning and using Rails has made me a better ASP.NET MVC developer. Just one example of this is helper methods.  When I started working with ASP.NET MVC, I didn't really want to use helpers and preferred to just use standard html tags, especially where links were concerned.  It was just me being stubborn and not really seeing all of the benefit of the helpers.  To my defense, coming from WebForms, I wanted to be as bare metal as possible and it seemed at first like a lot of the helpers were an unnecessary abstraction. I took my first look at Rails back in v1 and didn't spend very much time with it so I dismissed it and went on my merry ASP.NET WebForms way.  Then I picked up ASP.NET MVC and grasped the MVC pattern itself much better. After this, I took another look at Rails and everything made sense.  I decided then to learn Rails. (I think it is important for developers to learn new languages and platforms regularly so it was a natural progression for me) I wanted to learn it the right way, so when I dug into code, everyone used helpers everywhere for pretty much everything possible. I took some time to dig in and found out how helpful they were and subsequently realized how awesome they were in ASP.NET MVC also and started using them. In short, I love Rails (and Ruby in general).  I also love ASP.NET MVC and Entity Framework and yes I still love C++.  I have varying degrees of love for them individually at any given moment and it is likely to shift based on the current project I am working on.  I know you're thinking it so before you ask the question. "Which do I use when?", I'm going to give the standard developer answer of: It depends.  There are a lot of factors that I am not going to even go into that would go into a decision.  The most basic question I would ask though is,  does this project depend on .NET?  If it does, then I'd say that ASP.NET MVC is probably going to be the more logical choice and I am going to leave it at that.  I am working on projects right now in both technologies and I don't see that changing anytime soon (one project even uses both). With all that being said, you'll find me at code camps, conferences and user groups presenting on .NET, Ruby or both, writing about .NET and Ruby and I will likely be blogging on both in the future.  I know of others that have successfully branched out to other communities and with any luck I'll be successful at it too. On a (sorta) side note, I read a post by Justin Etheredge the other day that pretty much sums up my feelings about Ruby as a language.  I highly recommend checking it out: What Is So Great About Ruby?

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  • How to deal with author rights when building a website

    - by user393381
    I was thinking about developing a website that would involved photos and was wondering how to deal with the legal/author rights aspects. If someone could direct me to some resources to find out, I would appreciate. If I take Flicker as an example, people can upload pictures and share them. What if someone a picture that belong to someone else, like a professional photographer? Or what if someone upload a picture of someone and that person does not agree to that? Same question if someone put a picture in there that is not acceptable? Can a Disclaimer or Terms of Use avoid the Website (or the person managing a Website) to get in trouble when someone violate the law? Thanks.

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  • How do multi-platform games usually store save data?

    - by PixelPerfect3
    I realize this is a bit of a broad question, but I was wondering if there is a "standard" in the industry when it comes to storing save data for games (and is it different across platforms - Xbox/PS/PC/Mac/Android/iOS?) For example for a game like Assassin's Creed or The Walking Dead: They are on multiple platforms and they usually have to save enough information about the player and their actions. Do they use something like XML files, databases, or just straight binary dumps? How much does it differ from platform to platform? I would appreciate it if someone with experience in the game industry would answer this.

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  • Hero/Character sprite size in comparison to tile size?

    - by Kid
    So I'm making this simple platformer where the Hero is 16x16 in size, but also, the tile size is 16x16. Which sounds fine right? But my game window/world is 800x416, which makes the Hero is really really tiny in comparison. This really surprised me, but given Ive never made a platformer before it is also a new discovery. Is there a rule set for scale in platformer games? I'd like to have my game window remain the size it is (800x416), cause the game involves large levels. But how big should my hero be? I hope I was clear with the question, and I appreciate any insight. Thanks

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  • Is Morton Code algorithm patented?

    - by Statement
    Synonyms: Morton Code, Morton Curve, Z-Order Curve, invented 1966 by G. M. Morton according to wiki. Not to be confused with Hilbert Curves which is closely related and have similar name. I was wondering if mentioned algorithm is patented. More generally, is there any place one can browse patented algorithms? I am quite new to all this legal stuff and I am keen to know more. The real question I have, I guess, is: Can I make money off a library that provides Morton Coding, legally?

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  • As a programmer how do I plan to learn new things in my spare time

    - by priyank patel
    I am a Asp.Net/C# developer, I develop few projects in my spare time. I try to utilize my time as much as I can. I have been working for past 7 months. Suddenly these days I am a bit worried about learning the new stuff that is there for me as a programmer. I develop in my spare time so I don't get enough time to read books or blogs. So my question to some of you guys is how should I plan to learn new things, should I at least dedicate two-three evenings for new stuff, maybe ebooks while travelling is a good option too. How do you people plan to learn,should I also start to develop with whatever I learnt? As far as learning is concerned, should I just pick up the basics and then implement it or I should seek deeper understanding of the subject?

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  • Change font programmatically for GTK3 TextView (quickly-widgets TextEditor)

    - by monotasker
    In an app using PyGI and GTK3, I'm trying to let the user set the font family and size in a TextView through my app's settings dialog. In PyGI the TextView object has "set" methods for several properties, but not for font properties. I can set the font family via CSS using a CSS style provider. But I can't change that CSS dynamically to respect the font selected by a user. So how can I do this? (Note that the widget in question is actually the TextEditor from the quickly-widgets package and I'm using Quickly to build the app.) Thanks, Ian

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  • What Is Disk Fragmentation and Do I Still Need to Defragment?

    - by Jason Fitzpatrick
    Do modern computers still need the kind of routine defragmentation procedures that older computers called for? Read on to learn about fragmentation and what modern operating systems and file systems do to minimize performance impacts. Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-drive grouping of Q&A web sites. Secure Yourself by Using Two-Step Verification on These 16 Web Services How to Fix a Stuck Pixel on an LCD Monitor How to Factory Reset Your Android Phone or Tablet When It Won’t Boot

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