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• How can I practice with a full set of characters in KTouch?

  - by Josh

  I originally used KTouch to learn Qwerty touch typing, but found it too stressful on the hands. Hearing about Dvorak, I decided I'd switch to that (still using a Qwerty keyboard, but with the keys mapped differently). Since the keyboard is physically displaying a Qwerty layout, I cannot look at the keyboard for hints, making it very hard to type characters that I am unfamiliar with. Unfortunately, KTouch only covers letters, not punctuation and other symbols. Where can I find a lecture that covers all, or most of, the characters on a keyboard?

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• DataGridView lags for a second with large data updates

  - by alexD

  I have a DataGridView with about 400 rows and 10 columns. When the user first displays this table, it receives all of the data from the server and populates the table. The DGV uses a DataTable as it's data source, and when updating the DataTable I use row.BeginEdit/EndEdit and acceptChanges, but when the View itself is updated it lags for a second while all of the DGV is being updated. I am wondering if there is a way to make this smooth, so that for example, if the user is scrolling through the data and it updates, it won't interrupt the scrolling. Or if the user is moving the display around the screen and it updates, it won't interrupt. Is there an easy way to do this? If not, is there away to prevent the DGV from updating the view until all events have ended so it won't be repainted until the user stops scrolling, dragging, etc ?

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• Getting huge lags when downloading files via Service

  - by Copa

  I have a Service which receives URLs to download. The Service than downloads these URLs and save them to a file on the SD Card. When I put more than 2 items in the download queue my device is unusable. It nearly freezes. Huge lags and so on. Any idea? Sourcecode: private static boolean downloading = false; private static ArrayList<DownloadItem> downloads = new ArrayList<DownloadItem>(); /** * called once when the service started */ public static void start() { Thread thread = new Thread(new Runnable() { @Override public void run() { while (true) { if (downloads.size() > 0 && !downloading) { downloading = true; DownloadItem item = downloads.get(0); downloadSingleFile(item.getUrl(), item.getFile()); } } } }); thread.start(); } public static void addDownload(DownloadItem item) { downloads.add(item); } private static void downloadSuccessfullFinished() { if (downloads.size() > 0) downloads.get(0).setDownloaded(true); downloadFinished(); } private static void downloadFinished() { // remove the first entry; it has been downloaded if (downloads.size() > 0) downloads.remove(0); downloading = false; } private static void downloadSingleFile(String url, File output) { final int maxBufferSize = 4096; HttpResponse response = null; try { response = new DefaultHttpClient().execute(new HttpGet(url)); if (response != null && response.getStatusLine().getStatusCode() == 200) { // request is ok InputStream is = response.getEntity().getContent(); BufferedInputStream bis = new BufferedInputStream(is); RandomAccessFile raf = new RandomAccessFile(output, "rw"); ByteArrayBuffer baf = new ByteArrayBuffer(maxBufferSize); long current = 0; long i = 0; // read and write 4096 bytes each time while ((current = bis.read()) != -1) { baf.append((byte) current); if (++i == maxBufferSize) { raf.write(baf.toByteArray()); baf = new ByteArrayBuffer(maxBufferSize); i = 0; } } if (i > 0) // write the last bytes to the file raf.write(baf.toByteArray()); baf.clear(); raf.close(); bis.close(); is.close(); // download finished get start next download downloadSuccessfullFinished(); return; } } catch (Exception e) { // not successfully downloaded downloadFinished(); return; } // not successfully downloaded downloadFinished(); return; }

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• PHP - MySQL - Select runs indefinitely

  - by John

  I have three tables listings: id, pid, beds, baths, etc, etc, etc, db locations: id, pid, zip, lat, lon, etc, etc, etc, db images id, pid, height, width, raw, etc, etc, db id, pid & db are indexed. db just references the mls provider a particular item came from. in images the raw column holds raw image data there are about 15k rows in listings/locations, and about 120k rows in images so there are multiple rows that have the same pid. when i do "select pid from listings" or "select pid from locations" the query completes successfully in about 100ms. when i do "select pid from images" it just hangs in sqlyog and never completes... i was thinking since the raw column contains alot of information that it might be trying to select that too, but my query doesn't try to select that so I can't imagine why it's taking so long... any idea why this is happening??

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• How can I fix the compiz effects lag in unity?

  - by Samir

  I've recently installed ubuntu 11.04, and I actually liked Unity (although many others prefer Gnome), but there seems to be a lag problem. Every time I press the super button to bring out the Dash, or Super+W to show all windows, or any other action that involves some sort of effect, the effect lags a bit, and it could get really annoying. I've seen a fix using CompizConfig Settings Manager, but that doesn't seem to work for me. I've got a NVidia 9800 GT 1 GB video card, a 2 GB Ram, and not sure about the CPU (if you need it, tell me and I'll figure it out). Any help would be appreciated Thanks in advance.

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• Is the switch to Dvorak worth it?

  - by Kevin Weil

  To those who were experienced ( 70 WPM, say) typists before the switch to Dvorak -- were you faster after switching? There are a couple good SO threads on Dvorak, but they are more on how to learn or reduction in typing pain than speed before/after. I know it will take me 1-2 months to feel comfortable, but I want to know if I should expect to be faster afterward. I am a programmer and type maybe 90-110 WPM on QWERTY. EDIT: I agree that coding is not typically IO-bound, and that a minimum typing speed is sufficient. This is half from curiosity, but it will be an undertaking to achieve QWERTY parity, so I want to know if I should at least expect some asymptotic improvement.

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• What tricks can be used to type and edit code faster?

  - by Thomas

  As Jeff Atwood noted, we are typists first, programmers second. Fast typing and editing may not be essential to be a good programmer, but it certainly helps. I noticed that I consciously and subconsciously use various tricks to get my intent across to the computer as fast as possible. What tricks can be used to type and edit code faster? I'm hoping to collect a nice list here that we can all learn from, so that we can be ever so slightly more productive. One trick per answer please! (This is not about typing speed in general. There are other questions about that. It's also not about general answers like "learn your editor's shortcut keys". Think of this topic as micro-optimizations for specific cases. See my own answers for examples of what I mean.)

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• Will a polled event system cause lag for a server?

  - by Milo

  I'm using a library called ENet. It is a reliable UDP library. The way it works is a polled event system like this: ENetEvent event; /* Wait up to 1000 milliseconds for an event. */ while (enet_host_service (client, & event, 1000) > 0) { switch (event.type) { case ENET_EVENT_TYPE_CONNECT: printf ("A new client connected from %x:%u.\n", event.peer -> address.host, event.peer -> address.port); /* Store any relevant client information here. */ event.peer -> data = "Client information"; break; case ENET_EVENT_TYPE_RECEIVE: printf ("A packet of length %u containing %s was received from %s on channel %u.\n", event.packet -> dataLength, event.packet -> data, event.peer -> data, event.channelID); /* Clean up the packet now that we're done using it. */ enet_packet_destroy (event.packet); break; case ENET_EVENT_TYPE_DISCONNECT: printf ("%s disconected.\n", event.peer -> data); /* Reset the peer's client information. */ event.peer -> data = NULL; } } It waits up to 1000 milliseconds for an event. If I'm hosting say 75 event driven card games and a lobby on the same thread as this code, will it cause any problems. If my understanding is correct, the process will simply sleep until there is an event, when there is one, it will process the event then come back here where potentially 5 or so events have queued up since so enet_host_services would return right away and not cause lag. I have been advised not to use multiple threads, will that be alright like this? Thanks

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• Typewriter Sounds

  - by Mr. Typing Sounds

  Since I switched to Ubuntu 12.04 I'd only missed one thing. A program which could launch typewriter sounds while typing. For instance, in Windows I used this: http://www.colorpilot.com/soundpilot.html for a long time. I learned then that this writing program: http://gottcode.org/focuswriter/ had the sounds but only for the program itself. However, sometimes I'm writing an email, writing on the web or doing more complex writing tasks in LibreOffice - all places where these long missed typing sounds don't apply. Does any of you know of any plans in the community of the sound bit - typing sounds - as an independent program or applet to be fetched in the Ubuntu Software Center soon? The Rhythm Of Creative Writing would really be helped then! ;-)

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• Duck type testing with C# 4 for dynamic objects.

  - by Tracker1

  I'm wanting to have a simple duck typing example in C# using dynamic objects. It would seem to me, that a dynamic object should have HasValue/HasProperty/HasMethod methods with a single string parameter for the name of the value, property, or method you are looking for before trying to run against it. I'm trying to avoid try/catch blocks, and deeper reflection if possible. It just seems to be a common practice for duck typing in dynamic languages (JS, Ruby, Python etc.) that is to test for a property/method before trying to use it, then falling back to a default, or throwing a controlled exception. The example below is basically what I want to accomplish. If the methods described above don't exist, does anyone have premade extension methods for dynamic that will do this? Example: In JavaScript I can test for a method on an object fairly easily. //JavaScript function quack(duck) { if (duck && typeof duck.quack === "function") { return duck.quack(); } return null; //nothing to return, not a duck } How would I do the same in C#? //C# 4 dynamic Quack(dynamic duck) { //how do I test that the duck is not null, //and has a quack method? //if it doesn't quack, return null }

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• Are factors such as Intellisense support and strong typing enough to justify the use of an 'Anaemic Domain Model'?

  - by David Osborne

  It's easy to accept that objects should be used in all layers except a layer nominated as a data layer. However, it's just as easy to end-up with an 'anaemic domain model' that is just an object representation of data with no real functionality ( http://martinfowler.com/bliki/AnemicDomainModel.html ). However, using objects in this fashion brings the benefit of factors such as Intellisense support, strong typing, readability, discoverability, etc. Are these factors strong arguments for an otherwise, anaemic domain model?

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• How can I achieve strong typing with a component messaging system?

  - by Vaughan Hilts

  I'm looking at implementing a messaging system in my entity component system. I've deduced that I can use an event / queue for passing messages, but right now, I just use a generic object and cast out the data I want. I also considered using a dictionary. I see a lot of information on this, but they all involve a lot of casting and guessing. Is there any way to do this elegantly and keep strong typing on my messages?

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• Automatically closing braces in emacs?

  - by Dave Rigby

  Hi I've seen a plugin for Vim called AutoClose (discovered from this post) which automatically adds the closing brace when typing '(', '{' etc. For example; when I type the following ( | is the cursor): int main(| I would like the closing ) to be inserted automatically for me: int main(|) Does anyone know of a similar feature for emacs - Google has failed me this time!

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• How to type multiple characters on a mac with a single click?

  - by Yuval

  On a Windows machine, clicking and holding a keyboard key results in the key being types multiple times. For example, if I click and hold 'q' for a few seconds, I end up with the following: qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq Similarly, I can click and hold the Backspace key to delete multiple characters. On a Mac, it seems, clicking and holding a key for several seconds results in the key being types only once. To type it repeatedly, it is necessary to psychically click it multiple times. I'm unclear about whether that is a bug or a supposed-feature, but I am interested in replicating this functionality on a Mac. Any ideas? Thanks!

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• Replacing latex with unicode symbols

  - by Elazar Leibovich

  Often, during a conversation or an email, or at a forum, I would like to type some math, but I don't need full equation support. Unicode symbols should suffice. What I need is an easy way to type math related unicode symbols. Since I already know latex, it makes sense to use the latex symbol mnemonics to type the math symbols. What I currently did is to write an AutoHotKey script which automatically replaces \latexSymbol with the corresponding unicode symbol, using the "hotstrings" AutoHotKey feautres. However, the AutoHotKey hotstrings proved unstable for many strings. Having a couple of tens lines would cause AHK to fail recognizing the strings from time to time. Any other solution? (No, Alt+unicode number isn't convenient enough) Attached is my AHK script. The PutUni function is taken from here. ::\infty:: PutUni("e2889e") return ::\sum:: PutUni("e28891") return ::\int:: PutUni("e288ab") return ::\pm:: PutUni("c2b1") return ::\alpha:: PutUni("c991") return ::\beta:: PutUni("c992") return ::\phi:: PutUni("c9b8") return ::\delta:: PutUni("ceb4") return ::\pi:: PutUni("cf80") return ::\omega:: PutUni("cf89") return ::\in:: PutUni("e28888") return ::\notin:: PutUni("e28889") return ::\iff:: PutUni("e28794") return ::\leq:: PutUni("e289a4") return ::\geq:: PutUni("e289a5") return ::\sqrt:: PutUni("e2889a") return ::\neq:: PutUni("e289a0") return ::\subset:: PutUni("e28a82") return ::\nsubset:: PutUni("e28a84") return ::\nsubseteq:: PutUni("e28a88") return ::\subseteq:: PutUni("e28a86") return ::\prod:: PutUni("e2888f") return ::\N:: PutUni("e28495") return

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• How do I convert lower case text to uppercase text in Microsoft Word?

  - by user23950

  I want to convert lower case text to uppercase text in Microsoft Word.

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• Which keyboard has better ergomics?

  - by Absolute0

  When I was a kid I fell hard on my right wrist and since then I always get wrist pains when angling my wrist very high up (ie: when using a very high shaped mouse or doing push ups). So I have narrowed down my choices for a keyboard to the following 2: Microsoft Natural 4000: And the Razer Arctosa: The Razer is a slim type keyboard similar to a laptop feel and the hand-rest would help with keeping my hands straight with respect to my forearms. I am more inclined on getting the razer but am not sure if this will benefit my wrists in the long run. Any thoughts on this would be greatly appreciated. Thanks.

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• Can google chrome know how fast I type ?

  - by Manu

  Google Chrome privacy notice : When you type URLs or queries in the address bar, the letters you type are sent to Google Does this mean that Google could know how fast each Chrome user types ? Could be fun to have those numbers.

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• When I type certain characters, they come out as backquotes

  - by JXG

  Very strange behavior. Some background: I bought a new lenovo G550 laptop, running Windows 7. I live in Israel. When I type certain keys, in any application, they are prefaced with the backquote (`). These characters are: Insert, Delete, Left Ctrl (the right-hand one is fine), - (the regular dash: the one on the keypad is fine), =, 5 (the regular one), 4 (the one on the numeric keypad, whether or not Num Lock is on), and PgDn (the regular one). When I press the Fn key with these I don't get the behavior. Does anyone know why this is happening, or how I can fix it?

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• gnuplot - multiple lines with different x ranges

  - by Aly

  Hi, I am using gnuplot to try and plot several lines but each have different x ranges. I am running the following script: # gnuplot script for 'omarConf2EvONLY-vs-everyone-gta-lag-lpas-omarConf1-random-tag-tpas.dat' plot "omarConf2EvONLY-vs-everyone-gta-lag-lpas-omarConf1-random-tag-tpas.dat" using 1:2 with lines title '1' replot "omarConf2EvONLY-vs-everyone-gta-lag-lpas-omarConf1-random-tag-tpas.dat" using 1:3 with lines title '2' replot "omarConf2EvONLY-vs-everyone-gta-lag-lpas-omarConf1-random-tag-tpas.dat" using 1:4 with lines title '3' replot "omarConf2EvONLY-vs-everyone-gta-lag-lpas-omarConf1-random-tag-tpas.dat" using 1:5 with lines title '4' replot "omarConf2EvONLY-vs-everyone-gta-lag-lpas-omarConf1-random-tag-tpas.dat" using 1:6 with lines title '5' replot "omarConf2EvONLY-vs-everyone-gta-lag-lpas-omarConf1-random-tag-tpas.dat" using 1:7 with lines title '6' replot "omarConf2EvONLY-vs-everyone-gta-lag-lpas-omarConf1-random-tag-tpas.dat" using 1:8 with lines title '7' set terminal png size 800,600 set output "omar_vs_everyone-EVONLY.png" replot and the .dat file is just a file with columns such as: 1 0.5 0.5 0.1 2 0.6 1.3 0.8 3 0.7 0.32 4 0.7 0.35 5 1.3 4.32 6 1.67 notice that the columns have different lengths as each line has different x ranges. The problem I have is that it plots funny as shown below:

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• Using Scala structural types with abstract types

  - by Joshua Hartman

  I'm trying to define a structural type defining anything that has an "add" method (for instance, a java collection or a java map). Using this, I want to define a few higher order functions that operate on a certain collection object GenericTypes { type GenericCollection[T] = { def add(value: T): java.lang.Boolean} } import GenericTypes._ trait HigherOrderFunctions[T, CollectionType[X] <: GenericCollection[X]] { def map[V](fn: (T) => V): CollectionType[V] .... } class RichJList[T](list: List[T]) extends HigherOrderFunctions[T, java.util.List] This does not compile with the following error error: Parameter type in structural refinement may not refer to abstract type defined outside that same refinement I tried removing the parameter on GenericCollection and putting it on the method: object GenericTypes { type GenericCollection = { def add[T](value: T): java.lang.Boolean} } import GenericTypes._ trait HigherOrderFunctions[T, CollectionType[X] <: GenericCollection] class RichJList[T](list: List[T]) extends HigherOrderFunctions[T, java.util.List] but I get another error: error: type arguments [T,java.util.List] do not conform to trait HigherOrderFunctions's type parameter bounds [T,CollectionType[X] <: org.scala_tools.javautils.j2s.GenericTypes.GenericCollection] Can anyone give me some advice on how to use structural typing with abstract typed parameters in Scala? Or how to achieve what I'm looking to accomplish? Thanks so much!

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• Why does video playback lag/freeze when I go into full-screen mode?

  - by RanRag

  When I try to play my video files in SMPlayer it works fine but as soon as I switch to fullscreen mode(16:9) following thing happens: 1) Video starts lagging. 2) Audio and video goes out of sync. 3) CPU usage rises to ~50%. 4) SMPlayer starts to hang. My current SMPlayer configuration: 1)Video Output Driver = x11(slow) 2)Audio Output Driver = alsa(0.0-HDA Intel) 3)Cache = 8192 KB 4)Threads for decoding(MPEG-1/2 and H.264 only = 2 Things I tried solve this problem: 1) Tried changing video o/p driver to xv,gl. 2) Tried changing audio o/p driver to pulse. 3) Tried increasing cache size and also tried using nocache. Everything works fine on windows but I don't want to switch to windows just to play video files. My system config: Acer Aspire One D270 Atom N2600(Cedar Trail) 1.6GHz 2GB Memory Intel GMA 3600 graphics. Ubuntu 12.04 Kernel Release: 3.2.0-23-generic-pae Rest all things are working fine I have no resolution issue, bluetooth, wireless also working fine. Just ask me to submit any other log file I will be happy to post. SMPlayer log MPlayer Terminal output Codec Information(currently playing file):

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• Display turns off when watching videos (then video starts to lag), how to fix it?

  - by Bad Learner

  Okay, here's the thing - - On my Ubuntu 11.10 64-bit installation, I have the display set to turn off automatically after 3 minutes of inactivity. There are two problems now: the display turns off even when I am watching videos. But I don't want to keep fiddling my mouse or keyboard when I am watching a movie. Okay, like I said above, the display turns off, then I move the mouse a bit each time, and the display turns back on. But now, the video doesn't play properly, it lags. A lot actually. Are these issues common? Can these be fixed?

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• Why do my window titles lag behind the window contents?

  - by user8758

  The window title displayed in my maverick is often for the previous window. This is most noticeable in Firefox after using the back key to go to the previous window, but it also happens in file search and various media players. This even occurs in brand new installs of maverick and linux mint 10, so I know it has nothing to do with any configuration file snafu. I am using a Toshiba Satellite notebook with Intel graphics. Oddly enough, linux mint does not display this glitch when running in virtualbox (don't know about maverick in vbox). Any help with this issue would be greatly appreciated.

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• Why does my flash video get stuck? (not lag?)

  - by Sk606

  After moving to Ubuntu 10.10 Netbook Edition, I've noticed a strange problem that manifests itself most obviously with streaming videos like youtube and hulu. The video will load and begin playing fine and eventually stop, as though it is buffering. However, it usually happens between 40 and 60 seconds into the clip. The loading indication however shows that it actually isn't buffering anymore of the data, and will just sit there. If I force the clip forward (e.g. click to start the movie somewhere ahead of the stall point) the clip will usually reload quickly and begin playing as expected. Because of the quick load times, and the consistent stop of video, I don't think the problem is related to hardware performance or network throughput. Also, I have none of these problems in 10.04. Rebooting into 10.04 makes the problem disappear. However, one more clue, I also have noticed a higher occurrence of web pages that simply "stop loading" - say, 1/10 clicks while browsing I have to hit "reload" to get the page to load because the page timed out part of the way through. This seems strangely related to the video problem, though is a lot less infuriating. Help! Where do I begin to look with a problem like this?

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