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How to install the JDK on Ubuntu Linux
I am trying to install the Java Development Kit (JDK) on Ubuntu Linux distribution, but I am unable to install it.
33 A...
Cannot install packages using node package manager in Ubuntu
...ln -s /usr/bin/nodejs /usr/bin/node
alias node=nodejs
rm -r /usr/local/lib/python2.7/dist-packages/localstack/node_modules
npm install -g npm@latest || sudo npm install -g npm@latest
share
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improv...
JavaFX and OpenJDK
...hich has JavaFX integrated these days. However, some are using OpenJDK (on linux). This (old) question suggests that OpenJDK deals very badly with JavaFX. According to this question, the alternative OpenJFX will only be fully integrated into OpenJDK in version 9. So my question is twofold:
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What is copy-on-write?
...first write operation, hence the name ‘copy-on-write’.
Here after is a Python implementation of the copy-on-write technique using the proxy design pattern. A ValueProxy object (the proxy) implements the copy-on-write technique by:
having an attribute bound to an immutable Value object (the subj...
Increasing the maximum number of TCP/IP connections in Linux
...anner for large periods of "activity."
Default Sysctl values on a typical Linux box for tcp_tw_recycle & tcp_tw_reuse would be
net.ipv4.tcp_tw_recycle=0
net.ipv4.tcp_tw_reuse=0
These do not allow a connection from a "used" socket (in wait state) and force the sockets to last the complete tim...
How to copy to clipboard in Vim?
...o I use * because it functions as I expect it to in both environments.
In Linux distros you have to install vim-gtk (aka gvim) first to gain clipboard functionality. This is because non-gtk vim is typically compiled without X11 support. This is to allow it to run on console only machines (often ser...
如何编写一个独立的 PHP 扩展（译） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...是说想要编写 PHP 扩展，你既需要已经安装了 PHP，也需要下载一份 PHP 源码。
定义一个新扩展
我们给示例扩展命名为 “foobar”。
新扩展包含两个资源文件：foo.c 和 bar.c（还有一些头文件，但这些不只重要）。
示例扩展不引...
How to set the environmental variable LD_LIBRARY_PATH in linux
...s all the libraries that you wish to add to the system, for example
/home/linux/myLocalLibs
remember to add only the path to the dir, not the full path for the file, all the libs inside that path will be automatically indexed.
Save and run sudo ldconfig to update the system with this libs.
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Why does “while(true)” without “Thread.sleep” cause 100% CPU usage on Linux but not on Windows?
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By default, top on Linux runs in so-called IRIX mode, while the Windows Task Manager does not. Let's say you have 4 cores:
With IRIX mode on, 1 fully utilized core is 100% and 4 cores are 400%.
With IRIX mode off, 1 fully utilized core is 25...
中文网（自研/维护）拓展 · App Inventor 2 中文网
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中文网（自研/维护）拓展 拓展.aix下载
AI2Utils
属性
事件
方法
AirPlaneState
属性
事件
方法
AliSms
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