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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): 由 翻译 强力驱动 问题: I'm really excited about the new AVAudioEngine. It seems like a good API wrapper around audio unit. Unfortunately the documentation is so far nonexistent, and I'm having problems getting a simple graph to work. Using the following simple code to set up an audio engine graph, the tap block is never called. It mimics some of the sample code floating around the web, though those also did not work. let inputNode = audioEngine . inputNode var error : NSError ? let bus = 0 inputNode . installTapOnBus ( bus , bufferSize : 2048 , format :

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 found some code written in Swift on github , And get a little confused about this line var done: (NSError?, NSData, NSString?) -> () = { (_, _, _) -> () in } could you please explain the real meaning of this line? Thank you very much! 回答1: _ means don't name that thing. It can be used in a number of places. In your case, it is saying ignore the variable being passed into the closure. The code you gave is ignoring all parameters but you can also just ignore some parameters. in is the start of the implementation of the closure. In your

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 have an EventDispatcher class that implements the publish-subscribe pattern. It's interface looks something like this (simplified): class EventDispatcher { public: void publish(const std::string& event_name, std::unique_ptr<Event> event); std::unique_ptr<Subscription> subscribe(const std::string& event_name, std::unique_ptr<Callback> callback); private: std::unordered_map<std::string, std::vector<std::unique_ptr<Callback>>> m_subscriptions; } I want to expose this class to Python. The latest SWIG documentation states that: There is no

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: In my application I have a DataGrid with a DataGridComboBoxColumn that shows language specific entries converted from an enum <DataGridComboBoxColumn SelectedValueBinding = "{Binding myProperty , Converter={StaticResource enumValueConverter} , UpdateSourceTrigger=PropertyChanged}" > The user can switch the applcation language at any time. The ItemsSource of the DataGridComboBoxColumn is set programmatically on initializing my UserControl and whenever the language is switched: (( DataGridComboBoxColumn ) myDataGrid . Columns [ 8 ]).

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 wrapping this lib with Python SWIG that has a function looking like this: int set_option(Foo *foo, const char *name, void *value); In the lib const char *name is mapped to a type that I have access to look up: int , char * , char ** . The wrapper code generated by default accepts only a wrapped void * (naturally). What is the best way to make the wrapped method accept any Python object as argument, and do the type checking, and Python to C conversion in my own C code? My guess would be some kind of type map, but alas I cannot figure 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'm trying to serialize an object to an XML file, but am getting the above error. The problem seems to be with objects that contain a list of a base class but is populated by objects derived from the base class. Example code is as follows: public class myObject { public myObject() { this.list.Add(new Sw()); } public List<Units> list = new List<Units>(); } public class Units { public Units() { } } public class Sw : Units { public Sw(); { } public void main() { myObject myObject = new myObject(); XmlSerializer serializer = new XmlSerializer

　　应用SystemParametersInfo函数可以获取和设置数量众多的windows系统参数。这个小程序就是运用了SystemParametersInfo函数来设置桌面的墙纸背景，而且程序可以让我们选择多幅墙纸图片，程序会以一定的时间间隔自动改变墙纸。 1 #include <stdio.h> 2 #include <windows.h> 3 int main () 4 { 5 //i 代表图片的数量 6 /* 7 BOOL WINAPI SystemParametersInfo( 8 _In_ UINT uiAction, 9 _In_ UINT uiParam, 10 _Inout_ PVOID pvParam, 11 _In_ UINT fWinIni 12 ); 13 其中各参数的意义如下表: 14 15 参数： 意义 16 17 uAction Long，指定要设置的参数。参考uAction常数表 18 19 uParam Long，参考uAction常数表 20 21 lpvParam Any，按引用调用的Integer、Long和数据结构。 22 23 fuWinIni 这个参数规定了在设置系统参数的时候，是否应更新用户设置参数 24 25 下面是部分uAction参数，和使用它们的方法： 26 27 参数 意义和使用方法 28 29 6 设置视窗的大小

配置与上一节相同 开启web功能，并登录 [sw1]ip http enable [sw1]local-user admin New local user added. [sw1-luser-manage-admin]service-type telnet [sw1-luser-manage-admin]password simple admin123 [sw1-luser-manage-admin]authorization-attribute user-role level-15 [sw1-luser-manage-admin]service-type http 用户信息 查看配置文件 来源：博客园 作者： 春困秋乏夏打盹 链接：https://www.cnblogs.com/yhq1314/p/11416967.html

http://pecl.php.net/package/swoole wget http: // pecl.php.net/get/swoole-4.0.1.tgz tar zxvf swoole-4.0.1.tgz cd swoole-4.0.1 /www/wdlinux/apache_php/bin/phpize ./configure --with-php-config=/www/wdlinux/apache_php-7.1.2/bin/php-config make && make install service httpd restart 原文：https://www.cnblogs.com/zouke1220/p/9219183.html

一、下载解压php wget https://www.php.net/distributions/php-7.2.20.tar.bz2 tar -xjvf php-7.2.20.tar.bz2 cd php-7.2.20 注意：如果解压不成功，可能是因为没有bzip2解压工具 yum install -y bzip2 二、编译安装php # --prefix=php安装路径 --with-config-file-path=配置文件路径 ./configure --prefix=/usr/local/php-7.2.20 --with-config-file-path=/usr/local/php-7.2.20 出现问题了： 解决问题： yum install libxml2-devel 重新执行./configure命令，编译成功： 执行命令：（时间长，我大概等了10分钟） make make完后执行命令： make install 三、测试 创建一个php测试文件，输出“Hello World”; cd /usr/local/php-7.2.20 vim test.php 按:wq保存 然后执行命令： ./bin/php test.php 测试成功，编译安装php成功。 注意：这时你执行 php -v 会提示没有php命令，先去 ~/.bash_profile 添加环境变量