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• Microphone not recognised on my TekNmotion Intruder headset?

  - by Mitch Gardner

  I own a TekNmotion Intruder headset and Ubuntu 12.04 doesn't seem to even notice that my mic exists. I just re-installed Ubuntu and that doesn't seem to help either. They are a bit of a no-name brand and I can't find drivers for them. The audio plays clearly through the head phones but my mic wont record using "Record my desktop", Works rarely with Skype, and doesn't even show up when I go to Sound Settings ---- Input. Help please!

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• Experiences with learning Chinese

  - by Greg Low

  I've had a few friends asking me about learning Chinese and what I've found works and doesn't work. I was answering a question on a mailing list today and I thought I should post this info where it might be useful to many. The question that was initially asked was whether Rosetta Stone was useful but I've provided much more info on learning the language here. I’ve used Rosetta Stone with Chinese but it’s really hard to know whether to recommend it or not. Rosetta Stone works the same way in all languages. They show you photos and then let you both see and hear the target language and get you to work out what they’re talking about. The thinking is that that’s how children learn. However, at first, I found it very frustrating. I’d be staring at photos trying to work out what they were really trying to get at. Sometimes it’s far from obvious. I could not have survived without Google Translate open at the same time. The other weird thing is that the photos are from a mixture of countries. While that’s good in a way, it also means that they are endlessly showing pictures of something that would never happen in the target language and culture. For any language, constant interaction with a speaker of the target language is needed. Rosetta Stone has a “Studio” option. That’s the best part of the program. In my case, it lets me connect around twice a week to a live online class from Beijing. Classes usually have the teacher plus two to four students. You get some Studio access with the initial packages but need to purchase it for ongoing use. I find it very inexpensive. It seems to work out to about $70 (AUD/USD) for six months. That’s a real bargain. The other downside to Rosetta Stone is that they tend to teach very formal language, but as with other languages, that’s not how the locals speak. It might have been correct at one point but no-one actually says that. As an example, Rosetta Stone teach Gonggòng qìche (pronounced roughly like “gong gong chee chure” for bus. Most of my friends from areas like Taiwan would just say Gongche. Google Translate says Zongxiàn (pronounced somewhat like “dzong sheean”) instead. Mind you, the Rosetta Stone option isn't really as bad as "omnibus"; it's more like saying "public bus". If you say the option they provide, people would understand you. I also listen to ChinesePod in the car. They also have SpanishPod. Each podcast is about five minutes of spoken conversation. It is very good for providing current language. Another resource I use is local Meetup groups. Most cities have these and for a variety of languages. It’s way less structured (just standard conversation) but good for getting interaction. The obvious challenge for Asian languages is reading/writing. The input editors for Chinese that are part of Windows are excellent. Many of my Chinese friends speak fluently but cannot read or write. I was determined to learn to do both. For writing, I’m talking about on a computer, not with a pen. (Mind you, I can barely write English with a pen nowadays). When using Rosetta Stone, you can choose to have the Chinese words displayed in pinyin (Wo xihuan xuéxí zhongguó) or in Chinese characters (???????) or both. This year, I’ve been forcing myself to just use the Chinese characters. I use a pinyin input editor in Windows though, as it’s very fast.  (The character recognition input in the iPad is also amazing). Notice from the example that I provided above that the pronunciation of the pinyin isn’t that obvious to us at first either.  Since changing to only using characters, I find I can now read many more Chinese characters fluently. It’s a major challenge though. I can read about 300 now and yet you need around 2,500 to be able to read a newspaper fairly well. Tones are a major issue for some Asian languages. Mandarin has four tones (plus a neutral tone) and there is a major difference in meaning between two words that are spelled the same in pinyin but with different tones. For example, Ma (3rd tone?) is a horse, Ma (1st tone?) is like “mom”, and ma (neutral tone?) is a question mark and so on. Clearly you don’t want to mix these up. As in English, they also have words that do sound the same but mean different things in different contexts. What’s interesting is that even though we see two words that differ only by tone as very similar, to a native speaker, if you say the right words with the wrong tone, you might as well have said a completely different word. My wife’s dialect of Chinese has eight tones. It’s much worse. The reason I’m so keen to learn to read/write Chinese is that even though the different dialects are pronounced so differently that speakers of one dialect often cannot understand another dialect, the writing is generally the same. The only difference is that many years ago, the Chinese government created a simplified set of characters for some of the most commonly used ones. Older Chinese and most Cantonese speakers often struggle with the simplified characters. This is the simplified form of “three apples”: ????   This is the traditional form of the same words: ????  Note that two of the characters are the same but the middle two are quite different. For most languages, the best thing is to watch current movies in the target language but to watch them with the target language as subtitles, not your native language. You want to know what they actually said, not what it roughly means (which is what the English subtitle would give you). The difficulty with Asian languages like Chinese is that you have the added challenge of understanding the subtitles when they are written in the target language. I wish there were Mandarin Chinese movies with pinyin subtitles. For learning to read characters, I also recommend HanCard on the iPad. It is targeted at the HSK language proficiency levels. (I’m intending to take the first HSK exam as soon as I’m ready). Hope that info helps someone get started.  

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• Your interesting code tricks/ conventions? [closed]

  - by Paul

  What interesting conventions, rules, tricks do you use in your code? Preferably some that are not so popular so that the rest of us would find them as novelties. :) Here's some of mine... Input and output parameters This applies to C++ and other languages that have both references and pointers. This is the convention: input parameters are always passed by value or const reference; output parameters are always passed by pointer. This way I'm able to see at a glance, directly from the function call, what parameters might get modified by the function: Inspiration: Old C code int a = 6, b = 7, sum = 0; calculateSum(a, b, &sum); Ordering of headers My typical source file begins like this (see code below). The reason I put the matching header first is because, in case that header is not self-sufficient (I forgot to include some necessary library, or forgot to forward declare some type or function), a compiler error will occur. // Matching header #include "example.h" // Standard libraries #include <string> ... Setter functions Sometimes I find that I need to set multiple properties of an object all at once (like when I just constructed it and I need to initialize it). To reduce the amount of typing and, in some cases, improve readability, I decided to make my setters chainable: Inspiration: Builder pattern class Employee { public: Employee& name(const std::string& name); Employee& salary(double salary); private: std::string name_; double salary_; }; Employee bob; bob.name("William Smith").salary(500.00); Maybe in this particular case it could have been just as well done in the constructor. But for Real WorldTM applications, classes would have lots more fields that should be set to appropriate values and it becomes unmaintainable to do it in the constructor. So what about you? What personal tips and tricks would you like to share?

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• Commands in WPF - Part IV

  In Part III of this article series; we have seen how Input Binding is helpful. In this article we will explore on Command Objects and Command Types.

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• What are some good services for brainstorming domain name ideas? [closed]

  - by Clay Nichols

  Possible Duplicate: Is there a domain search tool on the web that works well? I've run across a few of these but can't remember them right now (and I've probably missed a few good ones). The idea is that you provide some input (a word(s)) and it comes up with synonyms, rhyming words, etc. Ideally, I'd want to have some confidence that they aren't just registering all the domains I come up with.

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• Improve the business logic

  - by Victor

  In my application,I have a feature like this: The user wants to add a new address to the database. Before adding the address, he needs to perform a search(using input parameters like country,city,street etc) and when the list comes up, he will manually check if the address he wants to add is present or not. If present, he will not add the address. Is there a way to make this process better. maybe somehow eliminate a step, avoid need for manual verification etc.

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• How do I import my first sprites?

  - by steven_desu

  Continuing from this question (new question - now unrelated) So I have a thorough background in programming already (algorithms, math, logic, graphing problems, etc.) however I've never attempted to code a game before. In fact, I've never had anything more than minimal input from a user during the execution of a program. Generally input was given from a file or passed through console, all necessary functions were performed, then the program terminated with an output. I decided to try and get in on the world of game development. From several posts I've seen around gamedev.stackexchange.com XNA seems to be a favorite, and it was recommended to me when I asked where to start. I've downloaded and installed Visual Studio 2010 along with the XNA Framework and now I can't seem to get moving in the right direction. I started out looking on Google for "xna game studio tutorial", "xna game development beginners", "my first xna game", etc. I found lots of crap. The official "Introduction to Game Studio 4.0" gave me this (plus my own train of thought happily pasted on top thanks to MSPaint): http://tinypic.com/r/2w1sgvq/7 The "Get Additional Help" link (my best guess, since there was no "Continue" or "Next" link) lead me to this page: http://tinypic.com/r/2qa0dgx/7 I tried every page. The forum was the only thing that seemed helpful, however searching for "beginner", "newbie", "getting started", "first project", and similar on the forums turned up many threads with specific questions that are a bit above my level ("beginner to collision detection", for instance) Disappointed I returned to the XNA Game Studio home page. Surely their own website would have some introduction, tutorial, or at least a useful link to a community. EVERYTHING on their website was about coding Windows Phone 7.... Everything. http://tinypic.com/r/10eit8i/7 http://tinypic.com/r/120m9gl/7 Giving up on any official documentation after a while, I went back to Google. I managed to locate www.xnadevelopment.com. The website is built around XNA Game Studio 3.0, but how different can 3.0 be from 4.0?.... Apparently different enough. http://tinypic.com/r/5d8mk9/7 http://tinypic.com/r/25hflli/7 Figuring that this was the correct folder, I right-clicked.... http://tinypic.com/r/24o94yu/7 Hmm... maybe by "Add Content Reference" they mean "Add a reference to an existing file (content)"? Let's try it (after all- it's my only option) http://tinypic.com/r/2417eqt/7 At this point I gave up. I'm back. My original goal in my last question was to create a keyboard-navigable 3D world (no physics necessary, no logic or real game necessary). After my recent failures my goal has been revised. I want to display an image on the screen. Hopefully in time I'll be able to move it with the keyboard.

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• How to configure 2 lan cards?

  - by Gurupal singh

  I have Ubuntu 14.04 installed on my system and i make it as a server in my office with having 15 employees working.I have 2 Lan cards in my system, one for input from router to my ubuntu server and other from my system to switch, which connects all my employees from through that switch via lan cables.Now, how can i configure my both LAN cards, as i wants to block some sites and make some restriction on the network. Please help me out. It's really a big problem for me. Thanks.

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• Simplifying C++11 optimal parameter passing when a copy is needed

  - by Mr.C64

  It seems to me that in C++11 lots of attention was made to simplify returning values from functions and methods, i.e.: with move semantics it's possible to simply return heavy-to-copy but cheap-to-move values (while in C++98/03 the general guideline was to use output parameters via non-const references or pointers), e.g.: // C++11 style vector<string> MakeAVeryBigStringList(); // C++98/03 style void MakeAVeryBigStringList(vector<string>& result); On the other side, it seems to me that more work should be done on input parameter passing, in particular when a copy of an input parameter is needed, e.g. in constructors and setters. My understanding is that the best technique in this case is to use templates and std::forward<>, e.g. (following the pattern of this answer on C++11 optimal parameter passing): class Person { std::string m_name; public: template <class T, class = typename std::enable_if < std::is_constructible<std::string, T>::value >::type> explicit Person(T&& name) : m_name(std::forward<T>(name)) { } ... }; A similar code could be written for setters. Frankly, this code seems boilerplate and complex, and doesn't scale up well when there are more parameters (e.g. if a surname attribute is added to the above class). Would it be possible to add a new feature to C++11 to simplify code like this (just like lambdas simplify C++98/03 code with functors in several cases)? I was thinking of a syntax with some special character, like @ (since introducing a &&& in addition to && would be too much typing :) e.g.: class Person { std::string m_name; public: /* Simplified syntax to produce boilerplate code like this: template <class T, class = typename std::enable_if < std::is_constructible<std::string, T>::value >::type> */ explicit Person(std::string@ name) : m_name(name) // implicit std::forward as well { } ... }; This would be very convenient also for more complex cases involving more parameters, e.g. Person(std::string@ name, std::string@ surname) : m_name(name), m_surname(surname) { } Would it be possible to add a simplified convenient syntax like this in C++? What would be the downsides of such a syntax?

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• Alternatives for 'egrep -o "success|error|fail" <filename> | sort | uniq -c'

  - by Wolfy

  I sometime need to check some logs and I do this with this command: egrep -o "success|error|fail" <filename> | sort | uniq -c Sample input: test error on line 10 test connect success test insert success test started at 00:00 test delete fail Sample output: 1 error 1 fail 2 success I would like to know if someone knows a way to do this with a shorter command? Before you ask why I would like to do this with an different command... No special reason, I'm just curious :)

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• Android Swipe In Unity 3D World with AR

  - by Christian

  I am working on an AR application using Unity3D and the Vuforia SDK for Android. The way the application works is a when the designated image(a frame marker in our case) is recognized by the camera, a 3D island is rendered at that spot. Currently I am able to detect when/which objects are touched on the model by raycasting. I also am able to successfully detect a swipe using this code: if (Input.touchCount > 0) { Touch touch = Input.touches[0]; switch (touch.phase) { case TouchPhase.Began: couldBeSwipe = true; startPos = touch.position; startTime = Time.time; break; case TouchPhase.Moved: if (Mathf.Abs(touch.position.y - startPos.y) > comfortZoneY) { couldBeSwipe = false; } //track points here for raycast if it is swipe break; case TouchPhase.Stationary: couldBeSwipe = false; break; case TouchPhase.Ended: float swipeTime = Time.time - startTime; float swipeDist = (touch.position - startPos).magnitude; if (couldBeSwipe && (swipeTime < maxSwipeTime) && (swipeDist > minSwipeDist)) { // It's a swiiiiiiiiiiiipe! float swipeDirection = Mathf.Sign(touch.position.y - startPos.y); // Do something here in reaction to the swipe. swipeCounter.IncrementCounter(); } break; } touchInfo.SetTouchInfo (Time.time-startTime,(touch.position-startPos).magnitude,Mathf.Abs (touch.position.y-startPos.y)); } Thanks to andeeeee for the logic. But I want to have some interaction in the 3D world based on the swipe on the screen. I.E. If the user swipes over unoccluded enemies, they die. My first thought was to track all the points in the moved TouchPhase, and then if it is a swipe raycast into all those points and kill any enemy that is hit. Is there a better way to do this? What is the best approach? Thanks for the help!

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• gstreamer pulseaudio echo cancellation

  - by user3618055

  I'm implementing a voip application using gstreamer, i use the example of the rtp in the plugin-good! i want to implement echo cancellation, i couldn't use the speex echo canceller with gstreamer because the input and the output are not in the same process. So, i want to use pulse audio to make echo cancellation? can any one help me how to deal with? the sender voice is pipeline = gst_pipeline_new (NULL); g_assert (pipeline); /* the audio capture and format conversion */ audiosrc = gst_element_factory_make (pulsesrc, "audiosrc"); g_assert (audiosrc); audioconv = gst_element_factory_make ("audioconvert", "audioconv"); g_assert (audioconv); audiores = gst_element_factory_make ("audioresample", "audiores"); g_assert (audiores); /* the encoding and payloading */ audioenc = gst_element_factory_make (AUDIO_ENC, "audioenc"); g_assert (audioenc); audiopay = gst_element_factory_make (AUDIO_PAY, "audiopay"); g_assert (audiopay); /* add capture and payloading to the pipeline and link */ gst_bin_add_many (GST_BIN (pipeline), audiosrc, audioconv, audiores, audioenc, audiopay, NULL); if (!gst_element_link_many (audiosrc, audioconv, audiores, audioenc, audiopay, NULL)) { g_error ("Failed to link audiosrc, audioconv, audioresample, " "audio encoder and audio payloader"); } and the receiver is : gst_bin_add_many (GST_BIN (pipeline), rtpsrc, rtcpsrc, rtcpsink, NULL); /* the depayloading and decoding */ audiodepay = gst_element_factory_make (AUDIO_DEPAY, "audiodepay"); g_assert (audiodepay); audiodec = gst_element_factory_make (AUDIO_DEC, "audiodec"); g_assert (audiodec); /* the audio playback and format conversion */ audioconv = gst_element_factory_make ("audioconvert", "audioconv"); g_assert (audioconv); audiores = gst_element_factory_make ("audioresample", "audiores"); g_assert (audiores); audiosink = gst_element_factory_make (pulsesink, "audiosink"); g_assert (audiosink); /* add depayloading and playback to the pipeline and link */ gst_bin_add_many (GST_BIN (pipeline), audiodepay, audiodec, audioconv, audiores, audiosink, NULL); res = gst_element_link_many (audiodepay, audiodec, audioconv, audiores, audiosink, NULL); g_assert (res == TRUE); i tried to change gstreamer proprietes to pulseaudio server in input and output and i used "pactl load-module module-echo-cancel aec_method=adrian" but i still listen to echo!! any one could help please thanks!!

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• Teaching "web design/development" to high-school home-school group. Good sources?

  - by anonymous coward

  I may soon begin teaching a "web design and development" class for a home-school co-op group. Any suggestions for "course" material? My first thought was to work through the Opera Web Standards Curriculum, but am interested in hearing about possible alternatives or suggestions that better cover the "very basics" of getting started with designing and developing web pages. Not necessarily looking for topics, so much as existing resources. Thanks so much for your input!

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• Requirment Analysis Communication

  - by Rahul Mehta

  Hi, Someday s ago we was discussing about the current project, and suddenly sir and my senior started talking about the new feature to add in the project , and i become lost :). i was not able to find how i should provide my input for the new feature. So i want to know what things should be discussed for developing new feature in project and how we can contribute in requirement talk of new features. Please suggest.

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• Which Presentation Would You Like to See at the OUG Ireland?

  - by Grant Ronald

  A novel idea, and one I think one worth trialling, is the OUG Ireland are allowing the public to vote on which presentation I will give at the conference in March.  So, rather than the a paper selection committee choosing,  the OUG community can choose.I know that Oracle tried this at Oracle World over the last couple of year and I think its good to get some community input.If you are a member of the OUG you can vote here.

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• How to prevent forum spam [closed]

  - by whamsicore

  Possible Duplicate: Make your site anti-bot? I want to prevent spam from overrunning my website, but neither do I want to make the user type in captcha each time they make a post. Any suggestions? Context: My website allows anonymous users to make leave comments on the fly. Comments are randomly displayed, so the more spam = higher chance of it being shown. Need to prevent spam but don't want to have each comment require captcha input.

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• After locking the screen in Ubuntu 14.04, password is not accepted, How can it be fixed?

  - by Itai Ganot

  I'm running Ubuntu 14.04 fully updated on my laptop. Since the last update every time I lock the screen (when leaving my room for example) - when I get back and input my password, it is not accepted even though it's the correct password, the error I get is: Password incorrect, please try again I found that clicking the "Switch Account" fixes the issue but it is very annoying, if you know any way to fix it, it would be nice. Thanks in advance

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• new block adding error

  - by ata ur rehman

  g++: error: ./gr_my_swig.cc: No such file or directory g++: fatal error: no input files compilation terminated. make[3]: *** [_gr_my_swig_la-gr_my_swig.lo] Error 1 make[3]: Leaving directory `/home/ataurrehman/gr-my-basic/swig' make[2]: *** [all] Error 2 make[2]: Leaving directory `/home/ataurrehman/gr-my-basic/swig' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/ataurrehman/gr-my-basic' make: *** [all] Error 2

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• tring to edit brightness

  - by Martin Mobbs

  i'm tring to edit the /sys/class/backlight/max_brightness file to stop ubuntu 12 returning to maximum brightness on each reboot. gedit won't save the file after i have modified it i have used chown to change ownership to me which was successful. I then changed gedits settings so it won't save a backup but it still won't save. It returns with this error, Could not save the file /sys/class/backlight/acpi_video0/max_brightness. Unexpected error: Error writing to file: Input/output error is this yet another bug?

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• CVE-2011-1937 Cross-site scripting (XSS) vulnerability in Webmin

  - by chandan

  CVE DescriptionCVSSv2 Base ScoreComponentProduct and Resolution CVE-2011-1937 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability 4.3 Webmin Solaris 10 SPARC: 145006-03 X86: 145007-03 This notification describes vulnerabilities fixed in third-party components that are included in Sun's product distribution.Information about vulnerabilities affecting Oracle Sun products can be found on Oracle Critical Patch Updates and Security Alerts page.

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• How to unit test with lots of IO

  - by Eric

  I write Linux embedded software which closely integrates with hardware. My modules are such as : -CMOS video input with kernel driver (v4l2) -Hardware h264/mpeg4 encoders (texas instuments) -Audio Capture/Playback (alsa) -Network IO I'd like to have automated testing for those functionalities, such as integration testing. I am not sure how I can automate this process since most of the top level functionalities I face are IO bound. Sure, it is easy to test functions individually, but whole process checking means depending on tons of external dependencies only available at runtime.

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• Can't update nor install anything due to "unrecoverable fatal error"

  - by Dunya Cengiz

  I haven't done any changes to my Ubuntu but since yesterday I can't download anything from Software Center nor can I update. All the time I get an error. I don't know why is this happening. I am currently using Ubuntu 12.04. Important part of the message from image: dpkg: unrecoverable fatal error, aborting: reading files list for package 'linux-headers-3.2.0-24': input/output error Error in function:

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• Ubuntu 12.04 Asus Eee PC 1005 weird keyboard

  - by radioheads

  After upgrading to 12.04 on my netbook the keyboard got weird behaviour Before logging in to any session everything's OK (i tested the input in vt1) but as i log in with any session (unity or unity-2d) keyboard behaves as if Fn key was pressed (i got numbers and special symbols instead of normal chars. I think the problem may be in acpi support, but i don't know where to start exactly. I will appreciate any help =) P.S. Sorry for my english - I am not a native speaker =)

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• How can I show a texture in a separate window in an XNA game?

  - by John

  I'm playing around with random map generation and what I want to do is: Input a command to generate a random map. A texture will be created resembling the generation, each pixel resembling each tile. A new window will pop-up, without removing the original one, that will contain the texture. I know how to do this except for the last part. Would someone please tell me how to create a new window and draw a texture to this window?

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• How to associate hardware volume control to USB speakers?

  - by Wolfger

  My Xubuntu system recognizes my speakers, and I can change the mixer settings to make them the active sound device, but no matter what I do, the hardware dial will only affect the onboard sound device. generic-usb 0003:046D:0A19.0003: input,hidraw1: USB HID v1.00 Device [ Logitech Logitech Z205 ] on usb-0000:00:1d.1-1/input2 updated to reflect the fact that this was Xubuntu desktop (from Kubuntu install originally) where I had this problem. I was able to easily do this from Ubuntu Natty installation.

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