要使用 Javascript 控制 Cookie 其實很簡單，首先要先搞懂 cookie 的格式。
Cookie 在瀏覽器收到從伺服器傳回的 HTTP Response 時，同時就夾帶了 Set-Cookie 的欄位。通常會是像
| Set-Cookie: name=value; expires=date; path=path; domain=domain; |
ex:
| Set-Cookie: myCookies=”Hello World”; expires=Tue, 03 Dec 2013 16:55:07 GMT; path=/Conjuror/R67A3; domain=fiddle.jshell.net; |
透過 document.cookie，我們可以直接對 cookie 做設定。要讓一個 cookie 失效，我們只要將日期設定一個已經過期的日期即可。
下面是一個簡單的範例：http://jsfiddle.net/Conjuror/R67A3/
sudo gem update --system安裝 nvm (node.js)
git clone git://github.com/creationix/nvm.git ~/.nvm ### You can also add this line to ~/.bashrc or ~/.zshrc if you are using zsh source ~/.nvm nvm sync ### Install latest version, you can also specific the version you want nvm install latest ### check all versions you installed nvm ls ### if you need it every time, set it as default nvm alias default 0.10.20
echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc . ~/.bashrc mkdir ~/local mkdir ~/node-latest-install cd ~/node-latest-install curl http://nodejs.org/dist/latest/node-v0.6.11.tar.gz | tar xz --strip-components=1 ./configure --prefix=~/local
(if you cannot configure previous step, you will need to install g++ and go back to configure again)
sudo yum groupinstall "Development Tools"
sudo make install curl http://npmjs.org/install.sh | sudo npm_debug=1 clean=no PATH=$PATH sh
There you go, you should be able to run node.js now.
npm install socket.io
