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可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am using Boost.Python to embed an interpreter in my C++ executable and execute some prewritten scripts. I have got it working so that I can call functions in the python file but the python code I want to use imports external files and these imports fail because 'no module named '. If I run the script directly from python everything works as expected however. So my question is what is the correct way of importing modules in python scripts that are being run via C++ bindings? C++ Code: #include "boost/python.hpp" int main(int argc, char**

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm trying to execute QCamera example on Ubuntu, Qt 5.6. "The camera service is missing" message observed. defaultServiceProvider::requestService(): no service found for - "org.qt-project.qt.camera" 回答1: Check if you have all dependencies installed. They are: qtmultimedia5-dev _ libqt5multimedia5-plugins Ex: sudo apt-get install libqt5multimedia5-plugins 回答2: Checking the example code it seems the example tries to construct the camera object with default camera. Method setCamera is obviously called with camera info which is not valid.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I understand that using postgres on osx is a little difficult because it has its own version running, and so in order to psql to it you need to supply the host name like so psql -h localhost mydatabasename -U me However how do you do this for your database.yml file for all the rail loveliness. If you try to connect with development: adapter: postgresql username: me database: mydatabasename you receive the classic Couldn't create database for {"adapter"=>"postgresql", "username"=>"me", "database"=>"mydatabasename"} could not connect to server

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: If the pipe operator is created like this: let (|>) f g = g f And used like this: let result = [2;4;6] |> List.map (fun x -> x * x * x) Then what it seems to do is take List.Map and puts it behind (fun x -> x * x * x) And doesn't change anything about the position of [2;4;6] So now it looks like this: let result2 = [2;4;6] (fun x -> x * x * x) List.map However this doesn't work. I am just learning f# for the first time now. And this bothered me while reading a book about f#. So I might learn what I'm missing later but I decided to ask anyway

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: My R project is structured like a package with directories /R , /vignettes , /data etc. In one of my Rmd docs in /vignettes I source a script which in located in /R . Inside this script I use read.csv() to load a file located in inst/extdata/ . The problem now is that by default the working directory inside the Rmd file is the directory where the file is located. Let's call it /Users/Me/Docs/Proj/vignettes . However in order for the R script to run the working directory needs to be the project's main directory ( /Users/Me/Docs/Proj ). I

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: As of Java 7, diamond syntax did not always work in method arguments, e.g. Why does the diamond operator not work for java.util.Collections methods in Java 7? . The answer to that question mentions that target type inference in Java 8 fixes that issue. Are there any remaining cases where diamond syntax cannot be used? 回答1: The diamond operator cannot always be used in Java 8. The original plan to improve inference in Java 8 ( JEP 101 ) had two goals: Add support for method type-parameter inference in method context Add support for method

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have Yii2 advanced template, I want to set translation for my frontend views, here is what I did: frontend/config/main.php: 'sourceLanguage' => 'en-US' , 'language' => 'en-US' , 'components' => [ 'i18n' => [ 'translations' => [ 'app*' => [ 'class' => 'yii\i18n\PhpMessageSource' , 'basePath' => '@common/messages' , 'sourceLanguage' => 'en-US' , 'fileMap' => [ 'app' => 'app.php' , 'app/error' => 'error.php' , ], ], ], ], ] then I added i18n.php in common/config: __DIR__ . '..' . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . '.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm having trouble understanding why the C# compiler can infer types for Array.ConvertAll(new int[1], i => Convert.ToDouble(i)); but not for Array.ConvertAll(new int[1], Convert.ToDouble); when it would seem that the former would be a more complicated deduction than the latter. Could someone please explain why this happens? 回答1: This issue is pretty well covered in this (archived) blog post: http://blogs.msdn.com/b/ericlippert/archive/2007/11/05/c-3-0-return-type-inference-does-not-work-on-member-groups.aspx In summary as I understand it

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I've been trying to add parametrized @pytest.mark.parametrize tests to a class based unittest. class SomethingTests(unittest.TestCase): @pytest.mark.parametrize(('one', 'two'), [ (1, 2), (2, 3)]) def test_default_values(self, one, two): assert one == (two + 1) But the parametrized stuff didn't kick in : TypeError: test_default_values() takes exactly 3 arguments (1 given) I've switched to simple class based tests (without unittest). But I'd like to know if anyone tried it and it worked. 回答1: According to pytest documentation : unittest

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Lets say I have a swing GUI which has textfeild and button. When I click button I want to save that value in text in db and return joptionpane "success" message. The way I used to do this is Model : JDBC class View : GUI : In that button's ' action performed ' action I call save method with parameter. Controller con = new Controller(); con.save(text1.getText()); Controller : Write a save method. JDBC db = new public void save(jTextfeild text){ text= text1.getText(); boolean b= db.putData("insert into .. values(text)"); if(b){ JOptionPane(