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How to detach a docker container to be a running daemon?
ByQ AIf I quite a docker instanced (invoking /bin/bash) by Ctrl+d, the docker container is closed. How to detach a docker container to be a running daemon without closing it? Docker has a detach sequence, which, by default, is Ctrl-p + Ctrl-q. If the docker detach sequence is overridden by the –detach-keys=”<sequence>” flag, you need to…
In Node.js, how to import functions from another JavaScript file?
ByEric MaIn Node.js, how to import functions from another JavaScript file like source common.sh in Bash? In the .js file to be imported such as ‘common.js’, organize functions to be exported like module.exports = { func1: function () { // func1 impl }, func2: function () { // func2 impl } }; In the other .js…
Linux UDP Programming Tutorial
ByEric MaUDP has its advantages over TCP, such as being relatively lightweight and receiving one packet per read call (recvmsg), although the programmers need to handle related issues, such as packet lost and out-of-order packets delivery. This post gives information and references on how to write UDP programs in a C/Linux environment. What is UDP Check…
C++ Reference and Styles
ByEric MaC++ References Reference of the C++ Language Library, with detailed descriptions of its elements and examples on how to use its functions: http://www.cplusplus.com/reference/ C++ reference: http://www.cppreference.com/w/ C++ Styles I compile a list of C++ styles on the Internet. http://geosoft.no/development/cppstyle.html http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml http://www.mactech.com/articles/develop/issue_02/C%2B%2B_Style_Guide_v007.html http://www.cs.uga.edu/~dkl/1302/Fall99/style.html Read more: GNU C Reference Manual Reference: Special HTML Characters How to generate…
WordPress theme TwentyFourteen interfere with AddThis Welcome Bar
ByEric MaThe AddThis welcome bar will make a empty gap on top of the WordPress webpage with the TwentyFourteen wordpress theme. Is there a fix for it? You will find AddThis will add this div to the webpage: <div class=”addthis_bar_placeholder” style=”height: 46px;”></div> which cause the problem. A little trick that works is to set that div’s…
ANSI C Grammar and ANSI C Grammar Specification in YACC
ByEric MaANSI C is a standardized version of the C programming language that was introduced in 1989 by the American National Standards Institute (ANSI). The ANSI C standard defines the syntax and semantics of the C language, including its grammar. In this post, we will explore the ANSI C grammar in more detail. The ANSI C…
