Recording the Way

Expecting Loose ComparisonIn regular comparison, data type does not matter. This if statement returns true: var x = 10;var y = “10”;if (x == y) In strict comparison, data type does matter. This if statement returns false: var x = 10;var y = “10”;if (x === y) It is a common mistake to forget that ...

Linux打开文件夹命令：gnome-open /etc ubuntu中 nautilus /etc Linux打开文件或者网址命令： xdg-open { file | URL }

编程提高方法： 不断练习。 抓大放小。（抓住那些感兴，趣能够推动编程水平真正有用的东西，放掉那些可能会纠缠住我们的细节问题）（不只是学习knowledge，更重要的是skills） 多练简单题。（从模仿开始，沉住气） 选最薄的参考书。 第一位问题是如何解决问题，而不是怎么快速解决。 今后的写作要完全按照金字塔的形式，先总后分来进行。先有结构，程序要先有轮廓，无论是在看程序还是在写程序 结构化程序设计：由大到小，由粗到精，由抽象到具体 程序结构： 程序由若干模块组成 模块之内“高内聚” 模块之间“低耦合” 勤加练习，多做简单题 数据部分、运算部分、控制部分、传输部分

Install Sublime Text 3 via the official apt repository:1. Open terminal via Ctrl+Alt+T or by searching for “Terminal” from desktop app launcher. When it opens, run command to install the key: wget -qO - https://download.sublimetext.com/sublimehq-pub.gpg | sudo apt-key add - 2. Then add the apt r...

Generating a new SSH key Open Terminal. Paste the text below, substituting in your GitHub email address. 1ssh-keygen -t rsa -b 4096 -C "your_email@example.com" This creates a new ssh key, using the provided email as a label. 1Generating public/private rsa key pair. When you’re prompte...

Vagrant uses Virtualbox to manage the virtual dependencies. You can directly download virtualbox and install or use homebrew for it. 1$ brew cask install virtualbox Now install Vagrant either from the website or use homebrew for installing it. 1$ brew cask install vagrant Vagrant-Manager helps yo...

在Ubuntu上用terminal安装Docker-engine时会出现以下问题： following packages have unmet dependencies: ```12```docker-engine : ```12```libsystemd-journal0 (>= 201) but it is not installable aufs-tools but it is not going to be installed ```12```Recommends: cgroupfs-mount but it is not going to ...

一些重要的SQL命令 SELECT - extracts data from a database UPDATE - updates data in a database DELETE - deletes data from a database INSERT INTO - inserts new data into a database CREATE DATABASE - creates a new database ALTER DATABASE - modifies a database CREATE TABLE - creates a new table ALTER TABLE -...

Ubuntu下使用atp-get安装，方法如下（未验证） 12345sudo apt-get install qt4-dev-tools #开发包 　　sudo apt-get install qtcreator #IDE　　sudo apt-get install qt4-doc #开发帮助文档 　　sudo apt-get install qt4-qtconfig #配置工具 　　sudo apt-get install qt4-demos #DEMO源码 QT But以上代码中有些为失效状态，考虑用以下命令替代： 1Ubuntu下安装Qt 复制代码 代码如下: $ sudo ap...

Selector Example Example description .class .intro Selects all elements with class=”intro” #id #firstname Selects the element with id=”firstname” * * Selects all elements element p Selects all elements element,element div, p Selects all elements and all elements element elemen...