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• Installing ImageMagick for C(++) on Ubuntu 12.10

  - by user167747

  I'm having a hard time installing the ImageMagick software for Ubuntu 12.10. So, I want the C and C++ API, not much more. Now when I go to imagemagick.org, they have a binary package for unix, namely an rpm. When I download and launch it, RPM complains that firstly I should be using alien, and secondly there are like 10000 missing dependencies. If I use alien to create a deb file, and the install it via the software center, the package does indeed install, but only the command line interface - no includes, anything. Same with apt-get imagemagick. (BTW - wtf, they don't have support for ubuntu?) I tried compiling from source (which I shoudn't be doing anyway - I'm not expecting much customization am I?), and then the includes are present, but the programs won't compile complaining about "undefined reference" and then a list of everything that isn't pure C (and I'm using the command imagemagick.org told me to use, namely cc -o wand pkg-config --cflags --libs MagickWand wand.c) so clearly I'm doing something wrong. Any help would be much appreciated.

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• C++ linkage error . What am I doing wrong ? [migrated]

  - by nashmaniac

  So, this is the first time I actually separated a single program into a header and two .cpp files . But I think I am getting an linkage error . Heres how the directory looks . (heres a link to my image I dont have enough rep to post image in the question) http://i.stack.imgur.com/sbT4V.png The main.cpp is my main source file where all the calling functions and other important stuff goes . In functions.cpp I have all my functions , in the coordin.h file I have the function prototypes and structures and Constants . Everything is ok no typo nothing I have checked everything . But I am getting an undefined reference to function error. I have included the coordin.h file too . Do you think the functions.cpp file needs to go somewhere else I mean is the compiler not looking inside that file ? Thanks !

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• Compiling old versions of R (2.11 or older) on Ubuntu 13.10 (or newer)?

  - by user283293

  I am trying to compile an old version of R (2.11.1, specifically). "Why?", you might ask. Well, I have a program I am trying to run (that was not written by me, but I am hoping to use in my research) that was written in "old" R, and the program writer has specifically mentioned that R-2.11.1 or older must be used. I have run ./configure with no obvious errors (the entire output being far too long to post here, but I have been warned that I cannot make PDF, DVI, or HTML versions of the help pages, which I'm not too concerned about). Next, when I pass the make command, I am met with the following error (after a long stream of successful commands): Warning in solve.default(rgb): unable to load shared library '/home/sbowerma/Programs/R-2.11.1/modules//lapack.so': /home/sbowerma/Programs/R-2.11.1/lib/libRlapack.so: undefined symbol: _gfortran_compare_string Error in solve.default(rgb) : lapack routines cannot be loaded Error: unable to load R code in package 'grDevices' Execution halted However, I have confirmed that the library lapack.so is, in fact, in the exact position it is supposed to be.

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• How do I recover a site after WordPress' Automatic Update has failed?

  - by Metacom

  I manage several WordPress websites, and successfully recently used the Automatic Upgrade feature to bring them up to 3.1. However, on one of the sites, I received a 503 (I believe it was 503). After that I was presented with "The service is unavailable." whenever I tried to access any page, including the index page, wp-admin, etc. I had similar problems before when a WordPress site got stuck in maintenance mode, and all I needed to do was login via FTP and rename or delete the .maintenance file. I tried that in this case, but that didn't do the trick. I am now presented with "Fatal error: Call to undefined function require_wp_db() in **\wp-settings.php on line 71" I can't figure out how to fix this problem, and I was wondering if anyone else had any ideas. Any suggestions are appreciated! Thank you for reading.

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• c# RegEx with "|"

  - by WtFudgE

  I need to be able to check for a pattern with | in them. For example an expression like d*|*t should return true for a string like "dtest|test". I'm no regex hero so I just tried a couple of things, like: Regex Pattern = new Regex("s*\|*d"); //unable to build because of single backslash Regex Pattern = new Regex("s*|*d"); //argument exception error Regex Pattern = new Regex(@"s*\|*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex(@"s*|*d"); //argument exception error Regex Pattern = new Regex("s*\\|*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex("s*" + "\\|" + "*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex(@"s*\\|*d"); //argument exception error I'm a bit out of options, what should I then use? I mean this is pretty basic RegEx i know, but I'm not getting it for some reason.. Thx

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• Why not standard Android emulators?

  - by Gerry

  I'm new to Android, but have published iphone and bberry apps. I see that I have to create an emulator using the SDK, before I can write and test an app. Why are there no default emulators? Why not at least a Nexus one, or HTC hero emulator shipped with the product? Sure its supposed to be flexible, but why not make it easy to create hello world and play around with a virtual Android phone? Both blackberry and iphone come with default simulators when you download the sdk. Thanks, Gerry

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• Problem in getting Contact Info

  - by Rahul

  Hi, I m working on application in which i have to send all contacts from Android mobile to other mobile through SMS. I don't have any problem in getting contact information but when I send those Contacts after few messages there is Alert Window pop up saying "A large number of message have being send" and ask if you want to send or not. I am testing this application on HTC Hero. Is this problem is for specific mobiles or for all? I don't know what should i do to avoid this window because I cant get SMS Sent event. Please help me with any ideas that i can implement........ Thanks

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• regular expression with "|"

  - by WtFudgE

  I need to be able to check for a pattern with | in them. For example an expression like d*|*t should return true for a string like "dtest|test". I'm no regular expression hero so I just tried a couple of things, like: Regex Pattern = new Regex("s*\|*d"); //unable to build because of single backslash Regex Pattern = new Regex("s*|*d"); //argument exception error Regex Pattern = new Regex(@"s*\|*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex(@"s*|*d"); //argument exception error Regex Pattern = new Regex("s*\\|*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex("s*" + "\\|" + "*d"); //returns true when I use "dtest" as input, so incorrect Regex Pattern = new Regex(@"s*\\|*d"); //argument exception error I'm a bit out of options, what should I then use? I mean this is a pretty basic regular expression I know, but I'm not getting it for some reason.

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• camera preview on androd - strange lines on 1.5 version of sdk

  - by Marko

  Hi all, I am developing the camera module for an android application. In main application when user clicks on 'take picture' button, new view with SurfaceView control is opened and camera preview is shown. When users click on dpad center, camera takes picture and save it to the disc. Pretty simple and straightforward. Everything works fine on my device - HTC Tattoo, minsdkversion 1.6 ...but when I tested application on HTC Hero minsdkversion 1.5, when camera preview is shown,some strange lines occur. Anyone has idea what is going on? p.s. altough preview is crashed, taking of pictures works fine here is the picture: Thanx Marko

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• Enable GPS and network location programmatically on rooted phone?

  - by Steve H

  I'd like to write a simple widget that toggles GPS and network location on and off. I've read that it's not possible to do that normally, but presumably on a rooted phone it must be doable. Does anyone know what the code would be? (I only need the code to toggle the location providers, I know how to make the widget.) It doesn't matter that this isn't a 'good' solution, I don't plan to distribute the widget. If it matters, this would be on an HTC Hero, still running v1.5.

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• Android app works on emulator but not on phone ("Can't dispatch DDM chunk XXXX: no handler defined")

  - by JR_vv2

  Hey all, I made a very simple application to start playing around with Android development. It works fine on the emulator, but it gives me the following error when I try to install it on my HTC Hero (v1.5): Sorry! The application Simple Dial (process com.foo.simpledial) has stopped unexpectedly. Please try again. (Force Close button) and on in the Eclipse console, I get the following message: [2010-06-14 23:10:52 - Simple Dial] Uploading Simple Dial.apk onto device 'HT9BSHF00222' [2010-06-14 23:10:53 - Simple Dial] Installing Simple Dial.apk... [2010-06-14 23:10:56 - Simple Dial] Success! [2010-06-14 23:10:56 - Simple Dial] Starting activity com.alanvaghti.simpledial.DialActivity on device [2010-06-14 23:10:57 - Simple Dial] ActivityManager: Can't dispatch DDM chunk 46454154: no handler defined [2010-06-14 23:10:57 - Simple Dial] ActivityManager: Can't dispatch DDM chunk 4d505251: no handler defined [2010-06-14 23:10:57 - Simple Dial] ActivityManager: Starting: Intent { action=android.intent.action.MAIN categories={android.intent.category.LAUNCHER} comp={com.alanvaghti.simpledial/com.alanvaghti.simpledial.DialActivity} } I did put 'android:debuggable="true"' inside the application tag on the manifest.xml Any ideas on what is going on?? Thanks in advance.

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• Fade effect onclick (jQuery)

  - by Nimbuz

  I have this very basic tabbed block: $('.tabbed-section .panel').hide(); $('.tabbed-section .panel:first').show(); $('.tabbed-section .tabs li:first').addClass('active'); $('.tabbed-section .tabs li a').click(function () { $('.tabbed-section .tabs li').removeClass('active'); $(this).parent().addClass('active'); var currentTab = $(this).attr('href'); var tab_id = $(this).attr('href'); $(this).closest('#hero').attr('class', 'clear ' + tab_id.replace('#', '')); $('.tabbed-section .panel').hide(); $(currentTab).show(); return false; }); .. it works great, but can I add fade effect when the active tab changes? I think there's a plugin (innerfade) for it but I want to avoid using another plugin if possible. Also, can the jQuery above be compacted further? Thanks for your help!

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• OpenGL extensions available on different Android devices

  - by MH114

  I'm in the process of writing an OpenGL ES powered framework for my next Android game(s). Currently I'm supporting three different techniques of drawing sprites: the basic way: using vertex arrays (slow) using vertex-buffer-objects (VBOs) (faster) using the draw_texture extension (fastest, but only for basic sprites, i.e. no transforming) Vertex arrays are supported in OpenGL ES 1.0 and thus in every Android-device. I'm guessing most (if not all) of the current devices also support VBOs and draw_texture. Instead of guessing, I'd like to know the extensions supported by different devices. If majority of devices support VBOs, I could simplify my code and focus only on VBOs + draw_texture. It'd be helpful to know what different devices support, so if you have an Android-device, do report the extensions list please. :) String extensions = gl.glGetString(GL10.GL_EXTENSIONS); I've got a HTC Hero, so I can share those extensions next.

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• Getting a variable out of a Public Void (Android)

  - by James Rattray

  I have this code: hubSpinner.setOnItemSelectedListener(new OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) { final MediaPlayer mp2 = MediaPlayer.create(Textbox.this, R.raw.hero); mp2.start(); } public void onNothingSelected(AdapterView<?> parentView) { } }); (The code basically runs when a new item is selected of a spinner and then plays a song, -which later will be a variable based on what was picked, but i'm fine as it is for now) Problem: And I want to be able to use 'mp2' out of this public void, (I want a button which pauses it) How can I do this? Please explain/show... Thanks alot James

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• Can't correctly stream x264 video to mobile via RTSP

  - by Andrew

  Hello! I'm trying to stream video compressed with x264 and NeroAAC and hinted with MP4Box. When i'm playing it with VLC player streaming works fine, as expected. When i'm trying to open URL with my HTC Hero, it switches to player mode, then starts "loading video" animation, then after some time it shows "unable to connect to server". Sample movies provided with DSS streamed fine regardless bitrate. I tried few encoding options, but always the same result. I suspect nocabac and level=11 but it didn't changed nothing. Is there some more specific encoding options for such type? Thank You!

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• Problem with onscreen keyboard on Droid

  - by mudit

  Hi all i am developing an application which has a general text entry form. So while testing on my moto droid, i am facing a strange issue-- when i touch an input field ( which is at lower end of the screen) -- the on screen keyboard pops up and hides the input field. So user have to enter blindly. So is this a sdk issue OR it is particular for droids OR am i doing something wrong??? I have tested this same form on G1, Hero..i see no issues at all. Please help...

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• Bitmap .compress() returning false

  - by Tsimmi

  Hi! The next call to Bitmap.compress(), has a different behavior on the Emulator and on a real device. In the Emulator, result is true, and in a real device the same call returns false. FileOutputStream fos = new FileOutputStream(destinationFile, true); boolean result = myBitmap.compress(Bitmap.CompressFormat.PNG, 100, fos); The thing is that on the emulator this is working great, on a real device ( a HERO) when calling .compress(), this returns false, witch means that it was unable to convert the image properly. Why is this? Thank you

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• Is it possible to establish default values for inherited fields in subclasses?

  - by Christian Mann

  I'm trying to establish a default value for inherited fields from superclasses. So, my class hierarchy is thus: Character - Enemy - Boss                 \                   - Hero Each Character has a public static char avatar to represent him on an ASCII playing field. How do I set a default value for the avatar of each class inherited from Character? Thank you!

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• Sending MMS into different Android devices

  - by 6istik

  I need to send MMS. Into my hero this code looks ugly but works: Intent sendIntent = new Intent("android.intent.action.SEND_MSG"); sendIntent.putExtra("address", toText); sendIntent.putExtra(Intent.EXTRA_SUBJECT, "subject"); sendIntent.putExtra("sms_body", textMessage); sendIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(url)); sendIntent.setType("image/jpeg"); startActivity(sendIntent); But it seems to me that on the other devices it doesn't work at all. I want to send directly to main messaging app without any choices(the better solution of course - direct from my app). Because not sure that all of them would handle it properly. If anybody could recommend any third-party library I'll be appretiate.

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• Openlayers - Redraw() layer. Add / Remove layer.

  - by Ozaki

  TLDR: I have an Openlayers map with a layer called 'track' I want to remove track and add track back in. I have an image 'imageFeature' on a layer that rotates on load to the direction being set. I want it to update this rotation that is set in 'styleMap' on a layer called 'tracking'. I set the var 'stylemap' to apply the external image & rotation. The 'imageFeature' is added to the layer at the coords specified. 'imageFeature' is removed. 'imageFeature' is added again in its new location. Rotation is not applied.. As the 'styleMap' applies to the layer I think that I have to remove the layer and add it again rather than just the 'imageFeature' Layer: var tracking = new OpenLayers.Layer.GML("Tracking", "coordinates.json", { format: OpenLayers.Format.GeoJSON, styleMap: styleMap }); styleMap: var styleMap = new OpenLayers.StyleMap({ fillOpacity: 1, pointRadius: 10, rotation: heading, }); Now wrapped in a timed function the imageFeature: map.layers[3].addFeatures(new OpenLayers.Feature.Vector( new OpenLayers.Geometry.Point(longitude, latitude), {rotation: heading, type: parseInt(Math.random() * 3)} )); Type refers to a lookup of 1 of 3 images.: styleMap.addUniqueValueRules("default", "type", lookup); var lookup = { 0: {externalGraphic: "Image1.png", rotation: heading}, 1: {externalGraphic: "Image2.png", rotation: heading}, 2: {externalGraphic: "Image3.png", rotation: heading} } I have tried the 'redraw()' function: but it returns "tracking is undefined" or "map.layers[2]" is undefined. tracking.redraw(true); map.layers[2].redraw(true); Heading is a variable: from a JSON feed. var heading = 13.542; But so far can't get anything to work it will only rotate the image onload. The image will move in coordinates as it should though. So what am I doing wrong with the redraw function or how can I get this image to rotate live? Thanks in advance -Ozaki Add: I managed to get map.layers[2].redraw(true); to sucessfully redraw layer 2. But it still does not update the rotation. I am thinking because the stylemap is updating. But it runs through the style map every n sec, but no updates to rotation and the variable for heading is updating correctly if i put a watch on it in firebug.

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• Zebra (ZSDK_API) 1.1.5266 Issue in XCode 4.6

  - by Poisydon

  Basically I'm having this error after I import the Zebra library in Xcode 4.6 Undefined symbols for architecture armv7: "_OBJC_CLASS_$_Linea", referenced from: objc-class-ref in libZSDK_API.a(LineaBtPrinterConnection.o) (maybe you meant: _OBJC_CLASS_$_LineaBtPrinterConnection) ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation) was wondering if anyone have encountered this issue with this version (1.1.5266) of the ZSDK_API. if anyone knows how to fix this, please post your instructions. My Thanks.

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• What is crtbegin.o and crtbegin_dynamic.o?

  - by theactiveactor

  When debugging a link error (undefined reference to _dso_handle) using the Android x86 toolchain, I noticed it's statically linking crtbegin_dynamic.o. What is the purpose of this file? There is another similar crtbegin.o in the toolchain install directory that contains the missing symbol (_dso_handle). What is the difference between crtbegin.o and crtbegin_dynamic.o?

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• How To Find Out If You are Using HTTPS Without $_SERVER['HTTPS']

  - by Chacha102

  I've seen many tutorials online that says you need to check $_SERVER['HTTPS'] if the server is connection is secured with HTTPS. My problem is that on some of the servers I use, $_SERVER['HTTPS'] is an undefined variable that results in an error. Is there another variable I can check that should always be defined? Just to be clear, I am currently using this code to resolve if it is an HTTPS connection: if(isset($_SERVER['HTTPS'])) { if ($_SERVER["HTTPS"] == "on") { $secure_connection = true; } }

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• Jquery history, inspect the history stack

  - by nickmorss

  Im using this history jquery plugin http://www.mikage.to/jquery/jquery_history.html and im trying to inspect the back stack. I can call this $.historyCurrentHash to return the current hash, but im trying to figure out how to look one step back in the stack. if i try calling this $.historyBackStack, but i just get an 'undefined'. anyone got any ideas? I can see that its not a public variable, but im wondering if i need to modify the library or just call it in a different way

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• String.split() method bug in GWT 2.0.3

  - by Domchi

  I'm upgrading a GWT project from GWT 1.7.1 to currently newest version 2.0.3. It seems that new GWT broke String.split(String regex) method - I get the following error on the Javascript side: this$static is undefined This happens in this line of my .nocache.js file: if (maxMatch == 0 && this$static.length > 0) { ...which happens to be a part of String split method equivalent in Javascript. Is there a cure for this, apart from doing string splitting myself?

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