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When and why would you seal a class?

... inheritance or else prohibit it (discussion of same item) Also note that Kotlin seals classes by default; its open keyword is the opposite of Java's final or the sealed of C#. (To be sure, there is no universal agreement that this is a good thing.) ...
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Is Python strongly typed?

...erence Java forces you to explicitly declare your object types int x = 50 Kotlin uses inference to realize it's an int x = 50 But because both languages use static types, x can't be changed from an int. Neither language would allow a dynamic change like x = 50 x = 'now a string' ...
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Checking if an Android application is running in the background

...E SOLUTION - not a hack, like previous solutions. Use ProcessLifecycleOwnerKotlin: class ArchLifecycleApp : Application(), LifecycleObserver { override fun onCreate() { super.onCreate() ProcessLifecycleOwner.get().lifecycle.addObserver(this) } @OnLifecycleEvent(Lifecyc...
https://www.tsingfun.com/it/cpp/1871.html 

Boost.Asio的简单使用(Timer,Thread,Io_service类) - C/C++ - 清泛网 - 专注C/C++及内核技术

...中调用 boost::asio::io_service::run() 来确保回调是适用于并发编程的. 一个基于asio的程序最好是从单线程入手,但是单线程有如下的限制,这一点在服务器上尤其明显: 当回调耗时较长时,反应迟钝. 在多核的系统上无能为力 如果...
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Android Studio Project Structure (v.s. Eclipse Project Structure)

...d O latest Android Auto Android things Android wear Android TV C++ support Kotlin support The structure in version 3.0.1 does not look at all like all other answers. Recent structure is as displayed in 2018, Android Studio 3.0.1 01/2018. Newbie kinda found something resembling to usable in featu...
https://www.tsingfun.com/ilife/tech/1224.html 

从Sloodle看三维虚拟学习环境的发展趋势 - 资讯 - 清泛网 - 专注C/C++及内核技术

...。在这种学习环境下 ,学生的学习动机明显增强 ,计算机编程能力也得到快速提高。 像 Active Worlds一样 , SL也允许教学设计者创作教育游戏和仿真 ,但是与其他平台不同的是 ,在 SL中内容生成工具不仅仅对管理员和开发者开放 ,...
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Peak signal detection in realtime timeseries data

...) C++ (brad) C++ (Animesh Pandey) Rust (swizard) Scala (Mike Roberts) Kotlin (leoderprofi) Ruby (Kimmo Lehto) Fortran [for resonance detection] (THo) Julia (Matt Camp) C# (Ocean Airdrop) C (DavidC) Java (takanuva15) JavaScript (Dirk Lüsebrink) TypeScript (Jerry Gamble) Perl (Alen) PH...
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Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升

...来清除所有的目标文件,以便重编译。 于是在我们编程中,如果这个工程已被编译过了,当我们修改了其中一个源文件,比如file.c,那么根据我们的依赖性,我们的目标file.o会被重编译(也就是在这个依性关系后面所定义...
https://www.tsingfun.com/it/cp... 

Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升

...来清除所有的目标文件,以便重编译。 于是在我们编程中,如果这个工程已被编译过了,当我们修改了其中一个源文件,比如file.c,那么根据我们的依赖性,我们的目标file.o会被重编译(也就是在这个依性关系后面所定义...
https://www.tsingfun.com/it/cp... 

Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升

...来清除所有的目标文件,以便重编译。 于是在我们编程中,如果这个工程已被编译过了,当我们修改了其中一个源文件,比如file.c,那么根据我们的依赖性,我们的目标file.o会被重编译(也就是在这个依性关系后面所定义...