HintikkaKimmo

some_var = "false"
another_var = "nil"

case
  when some_var == "pink elephant"
    puts "Don't think about the pink elephant!"
  when another_var.nil?
    puts "Question mark in the method name?"
  else
    puts "I guess nothing matched... But why?"

HintikkaKimmo

# Grab 23 random elements between 0 and 10000
arr = (1..10000).to_a.sample(23)
p arr

# This selects only elements that when divided by 3 have a remainder of 0 
# using the % (modulus) operator
p arr.select { |element| element % 3 == 0 }

# Using `reject` method filter out anything less than 5000
# and use `sort` and `reverse` methods to sort in descending order

HintikkaKimmo

class Person
  #have a first_name and last_name attribute with public accessors
  #attr_accessor

  attr_accessor :first_name, :last_name

  #have a class attribute called `people` that holds an array of objects
  @@people = []

  #have an `initialize` method to initialize each instance

HintikkaKimmo

You manipulate postgres through the user postgres, as so:

# su - postgres
$ createdb mydb
$ psql -s mydb
# create user someuser password 'somepassword';
# GRANT ALL PRIVILEGES ON DATABASE mydb TO someuser;

HintikkaKimmo

kill -9 $(lsof -i tcp:3000 -t)

HintikkaKimmo

# Meteor files to ignore now handled by .ignore file within .Meteor folder automatically

# settings file to ignore to protect API keys
settings.json

# MUP / MUPX file to ignore to protect server passwords and sensitive info.
mup.json

# npm package files to ignore
node?modules/

HintikkaKimmo

cities = ['Dublin', 'Amsterdam', 'Helsinki', 'London']

# Bad way to to walk trough the list print them and their location on the list
i = 0
for city in cities:
    print(i, city)
    i += 1

# Good way is to use enumerate function.
# Enumerate documentation at: https://docs.python.org/3/library/functions.html#enumerate

HintikkaKimmo

 ps aux | grep -i runserver
kill (pid)

HintikkaKimmo

import csv
import pprint

# opens csv file and assingns it to an object
with open('data-text.csv') as csvfile:
    # Use Sniffer to figure out csv dialect
    dialect = csv.Sniffer().sniff(csvfile.read(1024))
    csvfile.seek(0)
    # pass the dialect to filereader to read the file
    reader = csv.reader(csvfile, dialect)

HintikkaKimmo