open file vim plugin NERDTree

What's the "NERDTree"?

It's open file plugin by VIM.
http://www.flickr.com/photos/30496122@N07/2862367534/sizes/o/

How to install NERDTree
=========Create Folder============
cd ~
mkdir .vim
mkdir -p ~/.vim/autoload ~/.vim/bundle   #Create Folder "autoload" and "bundle"

=========Load files===============
cd ~/.vim/bundle
git clone https://github.com/scrooloose/nerdtree.git

cd ~/.vim/autoload
curl -O https://raw.githubusercontent.com/tpope/vim-pathogen/master/autoload/pathogen.vim

=========Setting .vimrc============(If you don't have .vimrc...touch .vimrc)
execute pathogen#infect()
syntax on
filetype plugin indent on


=========Open NERDTree===========
Open VIM and type ":NERDTree"
or
vim ~/.vimrc
nnoremap <silent> <F5> :NERDTree<CR>
push F5 open NERDTree


Reference:
http://www.vim.org/scripts/script.php?script_id=1658
https://github.com/scrooloose/nerdtree
https://github.com/tpope/vim-pathogen
https://www.youtube.com/watch?v=-GdaZ-Fuk9w

postgresql accept tcp/ip connections on port 5432

Modify two files and Restart PostgreSQL

1.pg_hba.conf

+  host all all 0.0.0.0/0  password

file path:

/etc/postgresql/9.4/main/pg_hba.conf

2.postgresql.conf

Remove the mark

#listen_addresses = '*'

#post = 5432

file path:

/etc/postgresql/9.4/main/postgresql.conf

Tyep Command Line:

service postgresql restart

Rails JSON API

可以用三種方式讓瀏覽器讀取URL顯示JSON
下面這種是撈取member這個table所有資料
http://localhost:3000/api/member

下面這種是撈取member的第一筆資料，如果要撈第50筆資料把數字改成50就好
http://localhost:3000/api/member/1
...
http://localhost:3000/api/member/50

下面這種跟http://localhost:3000/api/member/1 一樣都是撈第一筆資料只是URL寫法不同而已
http://localhost:3000/api/member/1.json

Model:
$rails g model member name:string email:string

Controller:
$rails g controller /api member

member_controller.rb
def index
   @member = Member.all
    render json: @member
  end

def show
   @member = Member.find(params[:id])
   render json: @member
end

def create
  @member = Member.new()
  if @member.save
    render json: @member
  else
    render json: @member.errors, status: :unprocessable_entity
  end
end

def update
  if @member.update()
    render json: @member
  else
    render json: @member.errors, status: :unprocessable_entity
  end
end

def destroy
  @member.destroy
  head :no_content
end


Routes:
namespace :api do
    resource :members, only: [:index, :create, :show, :update, :destroy]
end

查詢資料
curl -i http://localhost:3000/api/member/

寫入資料
curl -i -X POST -H "Content-Type: application/json" -d '{"member": {"name":"Apple","email':"ABC@gmail.com"}}' http://localhost:3000/api/member

更新指定資料
curl -i -X PUT -H "Content-Type: application/json" -d '{"name":"Apple","email':"ABC@gmail.com"}}' http://localhost:3000/api/member/1

刪除指定資料
curl -i -X DELETE http://localhost:3000/api/member/1