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  • Overloading methods that do logically different things, does this break any major principles?

    - by siva.k
    This is something that's been bugging me for a bit now. In some cases you see code that is a series of overloads, but when you look at the actual implementation you realize they do logically different things. However writing them as overloads allows the caller to ignore this and get the same end result. But would it be more sound to name the methods more explicitly then to write them as overloads? public void LoadWords(string filePath) { var lines = File.ReadAllLines(filePath).ToList(); LoadWords(lines); } public void LoadWords(IEnumerable<string> words) { // loads words into a List<string> based on some filters } Would these methods better serve future developers to be named as LoadWordsFromFile() and LoadWordsFromEnumerable()? It seems unnecessary to me, but if that is better what programming principle would apply here? On the flip side it'd make it so you didn't need to read the signatures to see exactly how you can load the words, which as Uncle Bob says would be a double take. But in general is this type of overloading to be avoided then?

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  • Weird system freeze. Nothing works keyboard/mouse/reset button - Ubuntu 12.04 64bits [closed]

    - by Simon
    I have fresh PC: i5 3570K with Intel 4000 onboard ASrock Z77 Extreme4-m 8GG RAM - Adata 1333Mhz... 1TB Seagate drive 7200rpm I've also fresh systems - Ubuntu/Win7 and today there was something strange. Ubuntu twice just freezed. Everything stopped, even keyboard and mouse wasn't responding. Even RESET button didn't work. Right now memtest is running, but I'd like to know, where else can i look for cause. Can it be software fault if even reset isn't working? Only long reset pressing rebooted PC... I'm a bit confused. Or should I test components - CPU, motherboard, disk. Which logs in Ubuntu should I check to diagnose cause? EHm I had few adventures with this PC already. Shipped motherboard was broken (ASrock Z68 Extreme3) and had old bios, so I had to contact with reseller, replace it and at the end decided on Z77, but everything took 3 weeks, so I have bad feelings... Edit: Both freezes were during editing something in gedit (it can be coincidence) and after few updates today - when memtest is end I'll check what was updated

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  • How to list all 2nd level subfolders and delete un-required ones?

    - by AllSolutions
    I provide support to a lot of clients. I have created a folder for each client, and under each client folder, I create a folder for the date on which the issue was reported. Now due to growing data, I want to delete all issues for all clients which are before a cut off date. The problem is while creating the date folder, I have not always followed a specific convention, some are creating using dd-MM-yyyy, some are using dd.MM.yyyy, etc. Is there a quick way I can list all such date subfolders, and then choose which ones I do not want, and delete them? I am using Windows XP SP 2 32 bit. Thanks.

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  • Server reboots every 4.5-5.5 minutes...

    - by Andy
    Hi, I've recently installed a server in colocation, and my server is rebooting every 4.5-5.5 minutes. Regardless of the OS I run, it reboots. I have all ECC memory in the server, so it should correct errors if there is a bad bit in the memory, right? It's weird because it always happens about 4.5-5.5 minutes after bootup. My motherboard is a Supermicro X8DTL-iF. I read on a blog that another person had the problem, and supermicro recommended to do a BIOS update. Is this the right course of action?

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  • Scrolling mouse sets windows sound volume

    - by Ikke
    Suddenly, when I use the scroll wheel of my mouse, it changes the windows sound volume level. I have a HP DV6-2030SD laptop with Windows 7 64 bit and a Zolid p50622 mouse. When I use the scroll function of the mouse pad of the laptop, it does not adjust the sound level. I don't have any special mouse drivers installed, just the standard windows drivers. When I scroll, I see the HP sound level screen: It doesn't do it always, but when it does, it prevents the current window to scroll, which is really annoying. Rebooting doesn't help. I've tried to put the USB dongle in a different port, but this doesn't help either. Any advise on how I can fix this?

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  • How to reduce disk thrashing (paging)?

    - by skevar7
    I have 4 GB of RAM, but Windows still thrashes disk sometimes (especially often when an application is minimized for some time and then I activate it again). Completely stupid, because Task Manager shows 2 GB of RAM are free. Is there any way to prevent Windows swapping out program memory? I tried setting Superfetch to cache startup files only (it helped a bit) and turning off paging file (it helped much, and worked well for me in Windows XP; but Windows Vista/Windows 7 don't allow that - it shows "low on memory" message frequently, even when I have 1 GB of RAM free.) What can you advise me to do?

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  • Self-serv advertising service

    - by Mystere Man
    I am seeking a self-serv advertising service for my websites, but I have a few restrictions that seem to make what i'm looking for hard to find. Specifically, I want to place "advertise here" links on my pages and allow end-users to purchase advertising on that site, page, and location. These ads will not be part of a national network. Supports multi-tenancy - That is, I have a number of domains using the same "web application" but with customized content per domain. When a customer wants to advertise on a given domain, then the ads will only appear on that domain and on that page of the domain (even though the page name may be the same across multiple domains). Supports fixed ad prices, not just CPC. I need monthly and quarterly pricing regardless of performance. Integrates with OpenX and other ad networks, so that if there is no self-serv on a given zone, it will use national advertising or direct advertising. Shiny Ads has much of this, but i'm looking for alternatives, as their prices are a bit crazy (20%) and can only do PayPal.

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  • Computer Locks Up Completely When Resuming From Standby

    - by kcoppock
    Okay, so I'm having a strange issue lately with my desktop, and off the top of my head I'm not sure what the problem is, so I'm hoping for some ideas on how to track down the cause. First, my PC: AMD Phenom 9600 Quad-Core 2.4 GHz 4 GB DDR2 160 GB boot HDD 1 TB & 120 GB secondary HDD Nvidia GeForce 8600 GTS Windows 7 Professional 64-bit I have my power settings as follows: Turn off the display: 10 minutes Turn off hard disk: 20 minutes Sleep after: Never After a while, I'll come back to use my computer again, wiggle the mouse, and the screen comes back on like normal, but the desktop is unresponsive. I can move the cursor, but nothing responds to clicks or keyboard entry. If I click a few times with the mouse, the computer eventually locks up completely and the mouse cursor stops moving as well. After I restart, everything works just fine. Is there a log you recommend checking or really any suggestions would be welcome at this point. Thanks!

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  • Ideas to tackle unwanted bad press/review on Google's SERP?

    - by Rob
    After Googling our company name to our horror we've found someone on Yelp.co.uk has reviewed our company. On the SERP your eye is immediately drawn to the 2 star review some complete stranger has written, which to be honest is pure slander! The most infuriating thing is the person who reviewed our company has never even been a client/customer. It's a bit like me reviewing a restaurant having never eaten or even been in there! We've sent her a private message on Yelp to remove the review and also sent a complaint to Yelp themselves but have yet to get a reply. We've resisted going mad at the reviewer and also requested that she re-review us having just relaunched our new website (it still riles us that she's not even a client though!). We've had genuine customers/clients review us on Yelp yet this 2 star review remains on Google's SERP. Roughly how long would it take to for our new reviews to over take this review? Does anyone have any suggestions as to how we can push the review off the 1st page of Google's SERP or any creative ways in which we can tackle this issue?

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  • How to refactor a myriad of similar classes

    - by TobiMcNamobi
    I'm faced with similar classes A1, A2, ..., A100. Believe it or not but yeah, there are roughly hundred classes that almost look the same. None of these classes are unit tested (of course ;-) ). Each of theses classes is about 50 lines of code which is not too much by itself. Still this is way too much duplicated code. I consider the following options: Writing tests for A1, ..., A100. Then refactor by creating an abstract base class AA. Pro: I'm (near to totally) safe by the tests that nothing goes wrong. Con: Much effort. Duplication of test code. Writing tests for A1, A2. Abstracting the duplicated test code and using the abstraction to create the rest of the tests. Then create AA as in 1. Pro: Less effort than in 1 but maintaining a similar degree of safety. Con: I find generalized test code weird; it often seems ... incoherent (is this the right word?). Normally I prefer specialized test code for specialized classes. But that requires a good design which is my goal of this whole refactoring. Writing AA first, testing it with mock classes. Then inheriting A1, ..., A100 successively. Pro: Fastest way to eliminate duplicates. Con: Most Ax classes look very much the same. But if not, there is the danger of changing the code by inheriting from AA. Other options ... At first I went for 3. because the Ax classes are really very similar to each other. But now I'm a bit unsure if this is the right way (from a unit testing enthusiast's perspective).

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  • Why is MySQL making the CPU run at about 80%?

    - by Robert
    MySQL is eating up about 80% of my CPU for no reason as far as I can see. Right now this server is rarely used, more of a test site I set up that will eventually be a used for production once I fix small problems like this. I run 3 instances of MySQL but it seems that my first instance is taking up all the CPU. When I turn off the first instance and leave the other two on everything runs fine. Any suggestions? I tried Show Processlist and no statements are being run besides "Sleep" and the query "Show Processlist" (obviously) at the time it's using up all this CPU. my.cnf is basic. I did not optimize or change any MySQL settings. Do you think this would cause such strange behavior? The machine is running Linux Centos 5.7 64 bit and MySQL 5.0.95. Thanks

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  • Spreading incoming batched data into a real-time stream

    - by pr1001
    I would like to display some events in 'real-time'. However, I must fetch the data from another source. I can request the last X minutes, though the source is updated approximately every 5 minutes. This means that there will be a delay between the most recent data retrieved and the point in time that I make the request. Second, because I will be receiving a batch of data, I don't want to just fire out all the events down a socket once my fetcher has retrieved it: I would like to spread out the events so that they are both accurately spaced amongst each other and in sync with their original occurrences (e.g. an event is always displayed 6 minutes after it actually happened). My thought is to fetch the data every 5 minutes from the source, knowing that I won't get the very latest data. The original data would be then queued to be sent down the socket 7.5 minutes from its original timestamp – that is, at least ~2.5 minutes from when its batch was fetched and at most 7.5 minutes since then. My question is this: is this the best way to approach the problem? Does this problem have any standard approaches or associated literature related to implementation best-practices and edge cases? I am a bit worried that the frequency of my fetches and the frequency in which the source is updated will get out of sync, leading to points where no data will be retrieved from the source. However, since my socket delay is greater than my fetch frequency, the subsequent fetch should retrieve newer data before the socket queue is empty. Is that correct? Am I missing something? Thanks!

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  • How to trim/cut clips with VLC

    - by penyuan
    I am running VLC 1.1.5 64-bit on Mac OS X 10.6.6. On the web I found instructions saying I should click on Video-Advanced Controls in the menu bar to reveal options that let me trim and cut video clips. However, there is no such option in my copy of VLC. What I want to do is cut a ~2 minute portion from the middle of a two hour footage (in MXF format that QuickTime can't open) that I've got. Is there another way to trim and cut clips of videos in VLC? Or should I use other (preferably free, Free, and open source) software? Thanks.

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  • LVM mirroring VS RAID1

    - by syrenity
    Hi. Having learned a bit about LVM mirroring, I thought about replacing the current RAID-1 scheme I'm using to gain some flexibility. Problem is that according to what I found on the Internet, LVM is: 1) Slower then RAID-1, at least in reading (as only single volume being used for reading). 2) Non-reliable on power interrupts, and requires disk cache disabling for prevention of data loss. http://www.joshbryan.com/blog/2008/01/02/lvm2-mirrors-vs-md-raid-1/ Also it seems, at least to several setup guides I read (http://www.tcpdump.com/kb/os/linux/lvm-mirroring/intro.html), that one actually requires a 3rd disk for storing the LVM log. This makes the setup completely unusable on 2 disks installations, and lowers the amount of used mirror disks on higher amount of disks. Can anyone comment the above facts, and let me know his experience of using LVM mirroring? Thanks.

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  • How to use graphical line drawing characters with Midnight Commander on OS X under ssh?

    - by Sorin Sbarnea
    I discovered that when I do ssh to a machine using OS X 10.6 and use mc I do not see the graphical line drawing characters. This does not happen if I open terminal and start mc. I'm connecting using putty configured to use xterm-color, configuraton that works just fine if I do ssh to a linux machine. The mc from OS X is version 4.7.0 (installed using macports). What locale returns: LC_CTYPE="C" <== ssh LC_CTYPE="UTF-8" <== Terminal.app ssh: mc display bits shows: 7-bit ASCII (changing does not help, it defaults to the same value) Terminal.app: mc display bits shows: UTF-8 The environment shows TERM=xterm-color in both cases Terminal.app and ss but mc looks different. I filed a bug to mc with this information at http://www.midnight-commander.org/ticket/2339

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  • That Tool is cURLy

    When you just use IE, Firefox or Chrome it can be easy to forget that HTTP is about more then just going to check the latest tech news at Engadget. It is a full and rich protocol, and a great way to experience that richness is the powerful command line utility cURL. cURL has a lot of options, but the syntax starts out simple. You can retrieve the contents of a web page with a simple curl http://blogs.claritycon.com/. The results should be the full text of the web page, tags and all. From there, you can use X to specify the HTTP verb to use, POST, PUT, DELETE, PATCH, etc and d to specify the payload of a POST or PUT. I have found cURL to be incredibly useful for two scenarios. First, as a good way to test basic web services. Second, while working a bit with CouchDB and another document based database, cURL has helped me learn more about RESTful APIs, including different verbs and response codes. cURL is a mainstay in our environments and programming languages precisely because it is simple, powerful and discoverable. I encourage more .NET developers to take a look, bask on the command line for a while and enjoy the plain text of the web. And this excellent logo:     -- Relevant Links -- Its not always the case with manuals, but the manual for cURL is quite useful: http://curl.haxx.se/docs/manual.html To make your command line look a little nicer (and more powerful) on Windows, check out Console and add some transparency effects: http://sourceforge.net/projects/console/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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  • Changing domain name - what are the practical steps involved

    - by Homunculus Reticulli
    I launched a website a couple of years ago, bright eyed and bushy tailed, with dreams of conquering the world. Unfortunately it wasn't to be. Now, that I am a bit older and wiser, I have spent some money on branding and creating more quality content etc, I am rebranding and relaunching the site with a new domain name. Although the traffic on the old site is laughable (i.e. non-existent), there are a few pages of good information on there and I don't want to lose any "juice" those pages may have gained because web crawlers have been seeing it for a few years now. Ok, the upshot of all that is this: I want to change my domain name from xyz.com to abc.com. I am maintaining the same friendly urls I had before, only the domanin name part of the url will change, so that any traffic coming to the old page will be forwarded/redirected? to the new page seamlessly. How do I go about achieving this (i.e. what are the steps I need to carry out, and to minimize any "disruption" to any credibility the existing site has with Googlebot etc? I am running Apache 2.x on a headless Linux (Ubuntu) server.

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  • VMware Fusion / New Machine / verify VMs?

    - by drewk
    I just got a 15" MacBook Pro with 8GB RAM, 2.66 i7 and 500GB SSD. Very sweet and fast! My old machine was 2.66 Core 2 Duo. I used Migration Assistant to migrate my old MBP to the new. When I started VMware to run Windows and Ubuntu I got the message first This VM has been moved or copied to a new machine. Did you move or copy it? I answered Copied. Then I got the message this CPU is a different configuration than the machine that created the VM. You may get unpredictable results. I answered Open Anyway. Windows XP, Windows 7, and Ubuntu all seem to work OK, but how can I verify? Is there some form of test harness for a VM? I have had a VM degrade and become unusable with very catastrophic data loss (on Parallels...), so I am a bit paranoid. Thanks,

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  • How to convince a client to switch to a framework *now*; also examples of great, large-scale php applications.

    - by cbrandolino
    Hi everybody. I'm about to start working on a very ambitious project that, in my opinion, has some great potential for what concerns the basic concept and the implementation ideas (implementation as in how this ideas will be implemented, not as in programming). The state of the code right now is unluckily subpar. It's vanilla php, no framework, no separation between application and visualization logic. It's been done mostly by amateur students (I know great amateur/student programmers, don't get me wrong: this was not the case though). The clients are really great, and they know the system won't scale and needs a redesign. The problem is, they would like to launch a beta ASAP and then think of rebuilding. Since just the basic functionalities are present now, I suggested it would be a great idea if we (we're a three-people shop, all very proficient) ported that code to some framework (we like CodeIgniter) before launching. We would reasonably be able to do that in < 10 days. Problem is, they don't think php would be a valid long-term solution anyway, so they would prefer to just let it be and fix the bugs for now (there's quite a bit) and then directly switch to some ruby/python based system. Porting to CI now will make future improvements incredibly easier, the current code more secure, changing the style - still being discussed with the designers - a breeze (reminder: there are database calls in template files right now); the biggest obstacle is the lack of trust in php as a valid, scalable technology. So well, I need some examples of great php applications (apart from facebook) and some suggestions on how to try to convince them to port soon. Again, they're great people - it's not like they would like ruby cause it's so hot right now; they just don't trust php since us cool programmers like bashing it, I suppose, but I'm sure going on like this for even one more day would be a mistake. Also, we have some weight in the decision process.

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  • Mixing JavaFX, HTML 5, and Bananas with the NetBeans Platform

    - by Geertjan
    The banana in the image below can be dragged. Whenever the banana is dropped, the current date is added to the viewer: What's interesting is that the banana, and the viewer that contains it, is defined in HTML 5, with the help of a JavaScript and CSS file. The HTML 5 file is embedded within the JavaFX browser, while the JavaFX browser is embedded within a NetBeans TopComponent class. The only really interesting thing is how drop events of the banana, which is defined within JavaScript, are communicated back into the Java class. Here's how, i.e., in the Java class, parse the HTML's DOM tree to locate the node of interest and then set a listener on it. (In this particular case, the event listener adds the current date to the InstanceContent which is in the Lookup.) Here's the crucial bit of code: WebView view = new WebView(); view.setMinSize(widthDouble, heightDouble); view.setPrefSize(widthDouble, heightDouble); final WebEngine webengine = view.getEngine(); URL url = getClass().getResource("home.html"); webengine.load(url.toExternalForm()); webengine.getLoadWorker().stateProperty().addListener( new ChangeListener() { @Override public void changed(ObservableValue ov, State oldState, State newState) { if (newState == State.SUCCEEDED) { Document document = (Document) webengine.executeScript("document"); EventTarget banana = (EventTarget) document.getElementById("banana"); banana.addEventListener("click", new MyEventListener(), true); } } }); It seems very weird to me that I need to specify "click" as a string. I actually wanted the drop event, but couldn't figure out what the arbitrary string was for that. Which is exactly why strings suck in this context. Many thanks to Martin Kavuma from the Technical University of Eindhoven, who I met today and who inspired me to go down this interesting trail.

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  • Is it possible to procure venture capital based on in-progress ideas? [migrated]

    - by Clay Shannon
    I hope this is not the wrong forum for this question, but I can't find one in the Stack Exchange "family" that would be more appropriate. I have ideas for two web sites which I think will be quite popular (they are totally unrelated to each other). I am a programmer, and a "creative" (photographer, author, musician). So I have the "vision" as well as the technical know-how to bring these websites into being. My "problem" is that I'm champing at the bit to complete them, and don't have much time to work on them (being employed fulltime, etc.) If I continue to work on them in my so-called spare time, it will probably be a year or more before they are both done. If I was in a position to work on them fulltime (IOW, if I had a "silent partner" willing to invest enough money that I could quit my job), I could have them complete in about three months. I would be willing to partner with somebody or some group who would back me financially in this way. My vision/work combined with their monetary investment could bring about "great things" or at least moderately great things. I know you can "crowd fund" startups and so on, but for that you need to expose your idea. My ideas are not something I would want to make public, as somebody might "steal" them. I'm willing to discuss them with serious individual potential investors, though (provided they were willing to sign a non-disclosure agreement). Does anybody have any recommendation on how I might find a suitable partner[s] for this/these ventures?

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  • Disadvantages of enabling AHCI after Win7 install

    - by Mario De Schaepmeester
    I've formatted my notebook that has a 5400RPM HDD with ~500GB capacity. After installing Windows 7 and about half the drivers (including chipset) I began to doubt whether to go for IDE or AHCI mode for my hard drive. There used to be a lot of discussion on the internet which is better and so far I understood it was particularly helpful on SSDs. Now the general consensus seems to be that AHCI mode is best for most hard drives. I have thus enabled AHCI in the middle of configuring my notebook (rest of the drivers, necessary software etc...) Two questions: considering my HDD's spec above, should I leave it on? Is there any disadvantage of enabling it after Windows 7 and chipset drivers installation? Windows 7 version is 64 bit Home Premium.

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  • How do I find add-ons for packages when using the command line?

    - by user74660
    My question is a little bit different from others already asked, I guess. I've already searched for answers, but I didn't find anything related. For example, I've always installed K3B via Terminal with the following command "sudo apt-get install k3b". It always worked, of course. One day, I decided to install it via Ubuntu Sofware Center and, to my surprise, there were a few Add-ons I didn't know about. I checked some of them to be installed as well because I found them useful. Now, here's my question: When we try to install a software via Terminal and this software has add-ons, how do we know that? And how do we install the add-ons via Terminal? I suppose we have to know the names of the add-ons first, and then install them one by one, once the main software has already been installed. But how do we get to know those names via Terminal? Using the Software Center is cool because it shows the add-ons, a brief description for each one and their names in brackets, right? How about that via Terminal? I had never paid attention to this until I used the Software Center. By the way, K3B was just an example, of course.

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  • Understanding IDAT chunk of PNG file format

    - by DRapp
    From the sample image below, I have a border in yellow just for display purposes only. The actual .png file is a simple black/white image 3 pixels by 3 pixels. I was originally thinking to try as a 2x2, but that would not help trying to interpret low/hi vs hi/low drawing stream. At least this way, I would have two black, one white from the top, or one white, two black from the bottom.. So I read the chunks of data, get to the IDAT chunk, decode that (zlib) and come up with 12 bytes as follows 00 20 00 40 00 80 So, my question, how does the above get broken down into the 3x3 black and white sample... Also, it is saved in palette format and properly recognizes the bit depth of 1 and color palette of 2... color pallet[0] is RGBA all zeros. Palette1 has RGBA of 255, 255, 255, 0 I'll eventually get into the multiple other depth formats later, just wanted to start with what would expect to be the easiest. Part II. Any guidance on handling the other depth formats would help if anything special to be considered especially regarding alpha channel (which I am already looking for in the palette) that might trip me up.

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  • How bad would be to focus on iOS/Android development for an indie developer?

    - by kender
    After some time developing games for others I'm thinking of moving towards my own productions. My background is 10+ years of software development, with last 2 years spent on the iOS development (Objective-C and CoronaSDK). With my current experience in Corona I can quickly develop for iOS and Android systems. And this is something that I'm probably gonna do with several of the game ideas I have, at least for the prototype part. But - I'm wondering if it's not a bad idea to focus on those 2 systems only. After all there are other mobile platforms, there are PCs, Macs and Linux boxes... All of them having gamers using them. I was wondering if it wasn't a good idea to try some other SDK, giving me more flexibility when it comes to platform-independance. There's Unity3D (I think I can develop a 2D game in it though), there's MoAI from what I checked. I see a few options, not sure which one is best as I have little experience in this field (publishing own games): Stick with CoronaSDK for the whole time, release for iOS and Android platforms, screw other mobile devices and PCs, Use Corona for prototyping, then when the idea goes more into the "production" phase rewrite it in MoAI or Unity3D for more platforms support, Start with one of those 2 SDKs right now (which means the prototype phase will be delayed a bit, but after that I can jump right into real coding). Any clues here, what to do?

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