hfogelberg

package main

import "gopkg.in/mgo.v2"

type Connection struct {
  DB *mgo.Database
}

const MongoDb = "test"

hfogelberg

Shift-Enter	run cell
Ctrl-Enter	run cell in-place
Alt-Enter	run cell, insert below
Ctrl-m x	cut cell
Ctrl-m c	copy cell
Ctrl-m v	paste cell
Ctrl-m d	delete cell
Ctrl-m z	undo last cell deletion
Ctrl-m –	split cell
Ctrl-m a	insert cell above

hfogelberg

## Installing

$ docker version
$ docker run hello-world    // Runs the Hello World sample. Downloads from Dockerhub if it isn't available locally
$ docker ps -a              // Prints out all available containers on local machine
$ docker ps                 // Prints out all running containers on local machine

## Searching and runing
$ docker search whalesay | grep docker    // Searches docker hub and filters with grep
$ docker run docker/whalesay cowsay Hello

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Start mysql
$ mysql.server start

Login as root
$ mysql -u root -p

Show databases
mysql> SHOW DATABASES

Create database

hfogelberg

# Postgres cheat sheet

Note on prompts: 
$  The command is run from the unix shell
#  The command is run from psql, logged in as the default user.
=> The command is run from psql, logged in as a specific user.


Make sure that psql will auto start
$ pg_ctl -D /usr/local/var/postgres start && brew services start postgresql

hfogelberg

# Data Preprocessing Template

# Importing the libraries
import numpy
import matplotlib.pyplot
import pandas
from sklearn.preprocessing import Imputer
from sklearn.preprocessing import LabelEncoder, OneHotEncoder, StandardScaler
from sklearn.cross_validation import train_test_split

hfogelberg

package main

import (
  "fmt"
)

type person struct {
            fname string
            lname string
          }

hfogelberg

// Print header
func myFunc(w http.ResponseWriter, r *http.Request) {
  for k, v := range r.Header {
    log.Println("key:", k, "value:", v)
  }
}


// A. Print type of variable
fmt.Printf("Type of x %T\n",  x)

hfogelberg

## Navigation
### Switch panes
ctrl-w, then arrow
ctrl-F Move to next screen

## NERDTree
m: Access menu
ctrl-k b Open NERDTree

## Run Unix command

hfogelberg

mongo 199.124.1.2:12128/dbname -u dbusername -p dbpassword
           1       2       3           4              5

Explanation for those who are struggling

1. you server static IP address
2. you exposed port no (any in one of the four user B when A->B)
3. your databasename this is what you enter while you run this command dokku mongo:create dbname
4 & 5. you will get this when running dokku mongo:info