Aite, [first poster here, pls don't bash]
So, I'm using the sound library, which I of course remembered to import, and works just fine, proof being given by the fact that all the other functions I used work as expected and give no problems neither in editor nor in execution.
Except, of course, for this little bugger of a pause() function, which I wrote as per below using no different a syntax from all the other functions, only to find out Processing isn't very keen on accepting its existence.
Problem shows both using 3.3.6 and 3.5.
Oh, and also, apparently isPlaying() returns an int, what's up with that?
If, as I'd suspect, that single line below won't be enough code to couple with the info to get to the bottom of it, here's a Dropbox link to the code (since it uses a bunch of files) so you can test it yourself.
It kinda won't work if you try to run it as is tho because it messes up when trying to load all the songs (in the last line of setup), yeah I kinda need some help with that too... works fine if you only load the first one tho!
https://www.dropbox.com/sh/di7mwit0w2l4513/AABipGDAdoKx277f8Hg_ZfhDa?dl=0
(Please, don't expect clear, extensively commented coding. I started working on this way before I learnt that was a thing. Deeply sorry. Of course, you can ask away about anything baffling you)
What did I try, er, writing it well???
I used .play(), .stop(), the volume ones, and they all, as per stated, work fine.
import processing.sound.*;
SoundFile[] songs= new SoundFile[1];
void setup(){
songs[0]=new SoundFile(this,"Small Bump.mp3");
songs[0].play();
}
void draw(){
}
void keyPressed(){
if (songs[0].isPlaying()==1)songs[0].pause();
}
When I copy your code into my Processing editor, I get a couple errors:
songs[0]="Small Bump.mp3";
The sounds array holds instances of SoundFile, but you're trying to store a String value here. Maybe you're looking for the SoundFile constructor?
if (songs[0].isPlaying()==1)
The isPlaying() function returns a boolean value, but you're comparing it to an int value.
songs[i].pause();
You haven't declared this i variable anywhere. Probably meant for this to be a 0.
If I fix all of these errors, then your code compiles fine.
You might want to take a look at the reference for the Sound library here.
The Sound library I had installed was 1.3.2, or something of the likes.
All the references I'd read were for 2.0+.
Having updated that through the "add library" menu, all was solved.
I am using Python3.4. I have installed a certain "itunespy" library from GitHub with pip, to work with iTunes API.
(https://github.com/spaceisstrange/itunespy)
I can now access it from console by
import itunespy
Except the library is only searching the US store through iTunes Api, whereas I need to access the UK store. I looked into the code and found I only need to change two lines to fix my problem.
Please can you tell me how I can access and change the source code of an already installed library.
Thank you.
Fork the repository
Clone the forked repository
Make changes and push to your remote (origin, usually)
You may pip install from your fork
I took a look at source code, and:
a) you may obviously change your source code in locally-copied file
b) you may patch these constants in run-time, like adding this type of code to your main:
import itunespy
itunespy.base_search_url = "NEW_VALUE"
itunespy.base_lookup_url = "NEW_VALUE"
c) library API seems to provide country keyword argument, so you do not have to do any of these hacks mentioned above. Simply do:
itunespy.search_track('something', country='UK')
With this keyword argument, searches should work as expected without any modifications of source code.
you really want to change the sourcecode?
How about just change your implementation?
inherit from the class
override/overload their methods with your own
work with your inherited class and their methods
pro: if there are changes in the original library you will take them with you when you update (secure-patches etc.) but your overridden/overloaded methods are still the one you use.
otherwise if you really want to change the source code, take a branch from github and change the sourcecode as you need it like mentioned by dolftax
My program has a very specific error that took me a while to track down - now I don't know how to fix it. My code is very long and in many files and I don't see much point in posting it here.
In the IDE, everything runs fine, in both Debug and Release (with the runtime library set to either /MTd or /MT, respectively, so I'm assuming all dependencies are included).
However, when I run the standalone, I get a crash. At first I thought it was a dependency problem but it doesn't seem so.
At some point in the code, I am accessing a vector via a method call: t->GetList(), where GetList is defined as std::vector<T*> & GetList() and the method simply returns a member variable (simply defined as std::vector<T*> field in the class).
It turns out, if I print out the size of the list while running from the IDE, I get 0 (which is the correct answer in this case).
However, when doing the same thing running from standalone, I get the size as 467467353.
I tried changing the method declaration to std::vector<T*> * GetList() and doing return &field; and updating the rest of the code but this didn't fix anything.
I then tried replacing the member variable field with a pointer, and in the constructor instantiating a new vector and deleting it in the destructor. Still no luck.
So I made a simple test case program that simply made a class with a vector field, and a method to return a reference to it. Then in main I would create an instance variable and getting the vector and printing the size. This worked both in VC++ and as a standalone - both returned zero.
This is driving me nuts and I can't figure out why I'm getting different behaviour. Why is the standalone running differently, and what should I be looking at to fix this?
Thanks
Okay so it was literally a bug in my code that was very well hidden. I was dynamically casting to a wrong type.
Somehow it slipped past when I was running on Windows and OSX in both Debug and Release, and as a standalone on OSX. Good thing I found it.
I have a project that is running fine on Android and WinPhone 8. When I attempt to run on iOS, I've getting the following error
Microsoft.Practices.ServiceLocation.ActivationException: Cannot
register: No public constructor found in x
where x is whatever SimpleIoc.Default.Register<T, TU>(); the flow hits first. I've moved the code around (as suggested elsewhere) to ensure all of the platform specific SimpleIoc calls are made in ViewModelLocator.
I've added public default ctors in the classes that are complaining about the error (I have though set the PreferredConstructor to the original, not the newly added public ctor).
I have a feeling that this error is a false positive (something else is failing, but pointing at that code).
Using Xam.iOS via a build server (the code is coming from VS2015). Xcode is running the 8.3 emulators (it may need updating to allow for 8.4 testing)
It could be that the Linker is optimising away the constructor, if it thinks it's not used. Try setting the Linker Options to "Don't Link" and see if it does it again, or even new-up an instance of the class elsewhere so that the Linker knows that the constructor is used. You don't necessarily want to leave it that way, but if it eliminates the error, you'll at least know the reason.
The [Preserve] attribute did the trick for me.
Decorate constructor with it and keep your linker settings.
This attribute is part of the Microsoft.WindowsAzure.MobileServices namespace.
I am getting this single error when I am linking my project,
COMMUNICATION.obj : fatal error LNK1179: invalid or corrupt file:
duplicate COMDAT '_IID_IXMLDOMImplementation'
What is the source of the problem?
This is a tricky one.
The issue is that the symbol(s)-generated is too-long, and an ambiguity exists:
//...
void MyVeryLongFunctionNameUnique_0(void);
void MyVeryLongFunctionNameUnique_1(void);
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// (example max-symbol-length-seen-by-linker)
In this case, the linker "sees" these two functions as the "same", because the part that makes them "unique" is longer-than-the-max-symbol length.
This can happen in at least three cases:
Your symbol names are "too-long" to be considered unique to the linker, but may have been fine for the compiler (such as when you expand-out from many nested templates)
You did some "trickery" that is invalid C++, and it passed the compiler, but you now have an invalid *.obj, and it chokes the linker.
You specified duplicate "unnamed" classes/structs, and the linker cannot resolve them.
===[UPDATE]===, It's not your fault, it's an internal problem with the compiler and/or linker (see below for possible work-arounds).
Depending on the issue (above), you can "increase" your symbol-length (by limiting-your-decrease-of-symbol-length), or fix your code to make it valid (unambiguous) C++.
This error is (minimally) described by Microsoft at:
http://msdn.microsoft.com/en-us/library/cddbs9aw(v=vs.90).aspx
NOTE: This max-symbol-length can be set with the /H option, see: http://msdn.microsoft.com/en-us/library/bc2y4ddf(v=vs.90).aspx
RECOMMEND: Check to see if /H is used on your command-line. If it is, delete it (do not specify max-symbol-length, it will default to 2,047, the /H can only DECREASE this length, not increase it).
However, you probably triggered it through the /Gy option (function-level-linking), which was probably implied through one of /Z7, /Zi, or /ZI: http://msdn.microsoft.com/en-us/library/958x11bc(v=vs.90).aspx
One MSDN thread that talks about this issue is:
http://social.msdn.microsoft.com/Forums/en-US/vcmfcatl/thread/57e3207e-9fab-4b83-b264-79a8a717a8a7
This thread suggests that it's possible to trigger this issue with "invalid-C++-code-that-compiles" (you get your *.obj), but that invalid-*.obj chokes the linker (this example attempts to use main as both a function and as a template):
http://www.cplusplus.com/forum/lounge/46361/
===[UPDATE]===
I should have said this before, because I suspected, but I now have more information: It might not be your fault, there seems to be an issue in the compiler and/or linker that triggers this error. This is despite the fact that the only common denominator in all your failed relationships is you.
Recall that the "above-list" applies (it MIGHT be your fault). However, in the case where, "it's not your fault", here's the current-running-list (I'm confident this list is NOT complete).
There is an internal error/corruption in your *.ilk file (intermediate-link-file). Delete it and rebuild.
You have /INCREMENTAL turned on for linking, but somehow that incremental-linking is not working for your project, so you should turn it off and rebuild (Project-Properties=>Configuration Properties=>Linker=>General=>Enable Incremental Linking [set to "No" (/INCREMENTAL:NO)]
There's a problem with "Optimization" for "COMDAT Folding" in your use. Your can "Remove Redundant COMDATs" by going to Project Proerties=>Configuration Properties=>Linker=>Optimization=>Enable COMDAT Folding, set to "Remove Redundant COMDATs (/OPT:ICF)
Here's an interesting thread from a guy who sometimes can link, and sometimes not, by commenting in/out a couple lines of code. It's not the code that is the problem -- he just cannot link consistently, and it looks like the compiler and/or linker has an internal problem under some obscure use case:
http://www.pcreview.co.uk/forums/fatal-error-lnk1179-t1430593.html
Other observations from a non-trivial web search:
this problem appears to be non-rare
it seems to be related to some form of template<> use
others seem to see this problem with "Release" build when it did not have this problem with "Debug" build (but it is also seen on the "Debug" build in many cases)
if the link "fails" on one machine, it may "succeed" on another build machine (not sure why, a "clean-build" appears to have no effect)
if you comment in/out a particularly significant couple-lines-of-code, and finish your build, and keep doing this until all the code is un-commented again, your link may succeed (this appears to be repeatable)
if you get this error with MSVC2008, and you port your code to MSVC2010, you will still get this error
===[PETITION TO THE GOOD PEOPLE OF THE WORLD]===
If you have other observations on this error, please list them below (as other answers, or as comments below this answer). I have a similar problem, and it's not my fault, and none of these work-arounds worked for me (although they did appear to work for others in their projects in some cases).
I'm adding a bounty because this is driving me nuts.
===[UPDATE+2]===
(sigh), Here's more things to try (which apparently work for others, but did not work for me):
this guy changed his compile settings, and it worked (from thread at http://forums.codeguru.com/showthread.php?249603.html):
Project->Settings->C++ tab, Debug cathegory: Inline function expansion: change from 'None' to 'Only _inline'.
the above thread references another thread where the had to re-install MSVC
it is possibly related to linking modules with "subtle-differences" in possibly-incompatible compiler and/or link switches. Check that all the "contributing libs" are built with the exact same switches
Here's some more symptoms/observations on this error/bug:
list(s) for above issues still apply
the issue seems to "start-showing-up" with MSVC2005, and continues with the same behavior for MSVC2008 and MSVC2010 (error still occurs after porting code to newer compilers)
restarting IDE, rebooting machine doesn't seem to work for anybody
one guy said an explicit "clean" followed by a recompile worked for him, but many others say it did not work for them
is often related to "incremental linking" (e.g., turn it off)
Status: No joy.
===[UPDATE+3 : LINK SUCCESS]===
Super-wacky-makes-no-sense fix to successfully link discovered!
This is a variation on (above), where you "fiddle-with-the-code-until-the-compiler-and/or-linker-behaves". NOT GOOD that one might need to do this.
Specific single linker-error (LNK1179) was for MyMainBody<>():
#include "MyClassA.hpp"
#include "MyClassB.hpp"
#include "MyClassC.hpp"
#include "MyClassD.hpp"
#include "MyMainBody.hpp"
int main(int argc, char* argv[])
{
// Use a function template for the "main-body",
// implementation is "mostly-simple", instantiates
// some local "MyClass" instances, they reference
// each other, and do some initialization,
// (~50 lines of code)
//
// !!! LNK1179 for `MyMainBody<>()`, mangled name is ~236 chars
//
return MyMainBody<MyClassA,MyClassB,MyClassC,MyClassD>(argc,argv);
}
THE FIX:
Convert MyMainBody<>() from a "template<>" to an explicit function, LINK SUCCESS.
THIS FIX SUX, as I need the EXACT-SAME-CODE for other types in other utilities, and the MyMainBody<>() implementation is non-trivial (but mostly simple) instantiations-and-setups that must be done in a specific way, in a specific order.
But hey, it's a temporary work-around for now: Confirmed on MSVC2008 and MSVC2010 compilers (same LNK1179 error for each, successful link on each after applying the work-around).
THIS IS A COMPILER AND/OR LINKER ERROR, as the code is "simple/proper-C++" (not even C++11).
So, I'm happy (that I got a link after suffering full-time for 2+weeks). But, disappointed (that the compiler and/or linker has a STUPID GLARING PROBLEM with linking a SIMPLE TEMPLATE<> in this use-case that I couldn't figure out how to address).
FURTHER, the "Bounty Ended", but nobody else wanted to take this on (no other answers?), so looks like "+100" goes to nobody. (heavy-sigh)
This question has a lot of answers but none of them quite capture what was happening in my codebase, and what I suspect the OP was seeing back in 2012 when this question was asked.
The Problem
The COMDAT error on an IID_* type is easy to accidentally reproduce by using the #import directive with both the rename_namespace and named_guids attributes.
If two #imported type libraries contain the same interface, as is likely the case for OP's IXMLDOMImplementation, then the generated .tlh files will declare IID_IXMLDOMImplementation in both namespaces, leading to the duplicate.
For example, the code generated for:
#import <foo.tlb> rename_namespace("FOO") named_guids;
#import <bar.tlb> rename_namespace("BAR") named_guids;
...could be simplified into something like this:
namespace FOO {
extern "C" __declspec(selectany) const GUID IID_IFOOBAR = {0};
}
namespace BAR {
extern "C" __declspec(selectany) const GUID IID_IFOOBAR = {0};
}
Here's a simple RexTester reproduction of the problem: https://rextester.com/OLAC10112
The named_guids attribute causes the IID_* to be generated and the rename_namespace attribute wraps it in the namespace.
Unfortunately, in this case, extern "C" does not seem to work as expected when it appears inside a C++ namespace. This causes the compiler to generate multiple definitions for IID_FOOBAR in the same .obj file.
DUMPBIN /SYMBOLS or a hex editor confirms the duplicate symbols.
The linker sees these multiple definitions and issues a duplicate COMDAT diagnostic.
A Solution
Knowing that rename_namespace doesn't play well with named_guids, the obvious solution is to simply not use them together. It's probably easiest to remove the named_guids attribute and instead use the _uuidof() operator.
After removing named_guids from #import directives and touching up the code, replacing all uses of FOO::IID_IFooBar with _uuidof(FOO::IFooBar), my COM-heavy codebase is back to building again.
This issue is reported as a bug in some specific versions of Visual Studio 2017. Try patching 15.9.1 or later to fix this issue
Reported Issue in VS 15.8 Preview 4
Resolved patchs in VS 15.9 Preview 2
I encountered this problem whilst porting some code (1) from MSVC to GCC. To get the build to link on GCC, I had to provide empty implementations for some specialised templated functions (2), and this resulted in LNK1179 on MSVC. I was able to resolve by inlining the functions (3), i.e.
template<> template<> void LongName1<LongName2>::FunctionName(boost::library::type1 & a, const unsigned int b);
template<> template<> void LongName1<LongName2>::FunctionName(boost::library::type1 & a, const unsigned int b) {};
template<> template<> inline void LongName1<LongName2>::FunctionName(boost::library::type1 & a, const unsigned int b) {};
I had to do
c++ -> code generation -> enable function - level linking -> no
Hopefully my lame workaround will help someone: I make sure to manually delete ALL .obj AND intermediate build files (including at least .pch, .pdb, .tlog, .lastbuildstate and anything else just hanging out looking suspicious) and rebuild from scratch.
I suggest without evidence that having some files left over from a previous build tends to cause the problem to happen more frequently. In my specific build system, I delete and recreate the .vcxproj and .sln files from scratch as well.
My own personal suspicion is that some kind of race condition exists in the build/link process between the time that intermediate files are read and the time they are written in a large project. Again, I have no evidence this is true, but this is my only guess that seems to fit all the known facts of the bug.
I wrote Outlook addins years ago and I was asked to write another. Right off the bat, I ran into this problem and through a little process of elimination, I fixed mine.
It turns out that when you choose an extensibity project(I hand coded mine back in the day), it creates and save 2 objects that I was unaware of: DTE and DTE80. To create the interfaces that manipulate these objects, they import directly from the DLLs in stdafx.h. Being that I'm working on Outlook, I also needed to import a couple of interfaces: Office and Outlook.
So, seeing as this error popped up almost immediately after writing my first tidbits of code, I started over, and added one thing at a time. The project blew chunks in the described way right after I added:
//Added mvc
//The following #import imports MSO based on it's LIBID
#import "libid:2DF8D04C-5BFA-101B-BDE5-00AA0044DE52" version("2.2") lcid("0") rename_namespace("Office") raw_interfaces_only named_guids
using namespace Office;
//The following #import imports Outoloks Object lib based on it's LIBID
#import "libid:00062FFF-0000-0000-C000-000000000046" rename_namespace("Outlook") raw_interfaces_only named_guids
using namespace Outlook;
So, seeing as I had no intention of figuring out the DTE stuff, I just commented out them and anything having to do with them:
//The following #import imports VS Command Bars based on it's LIBID
// #import "libid:1CBA492E-7263-47BB-87FE-639000619B15" version("8.0") lcid("0") raw_interfaces_only named_guids
//The following #import imports DTE based on it's LIBID
// #import "libid:80cc9f66-e7d8-4ddd-85b6-d9e6cd0e93e2" version("8.0") lcid("0") raw_interfaces_only named_guids
//The following #import imports DTE80 based on it's LIBID
// #import "libid:1A31287A-4D7D-413e-8E32-3B374931BD89" version("8.0") lcid("0") raw_interfaces_only named_guids
After wandering around fixing the compile errors, it compiled and linked just fine. I'm not suggesting this will work for everybody, but it worked for me. Good luck to any who pass by here....
I got this error and was really confused about it. Ended commenting out everything in the referenced cpp and reintroduce things in small batches until the file was back in the same state as when I started. And I don't get the error anymore. To me this points to this in my case being a bug in the compiler but since I can't reproduce it anymore I can't get help further than that.
I'm on:
Microsoft Visual Studio Professional 2019
Version 16.11.3