wulymammoth

#0: Given an input, accounts, write a function to produce the given output. Feel free to ask questions

accounts = [
  ["John", "[email protected]", "[email protected]"],
  ["John", "[email protected]"],
  ["John", "[email protected]", "[email protected]"],
  ["Mary", "[email protected]"]
]

Output: [

wulymammoth

Open iTerm.
Go to iTerm > Preferences... > Profiles > Keys
Under Profile Shortcut Keys, click the + sign.
Type your key shortcut (option-b, option-f, option-d, option-left, etc.)
For Action, choose Send Escape Sequence.
Write b, d or f in the input field.

wulymammoth

def next_permutation(nums):
    '''
    brute force:
    - generate all permutations, loop and find the matching, return the next
    - time: O(N^2 * N!) + O(N) [printing/string/char concatenation is the N^2]

    procedure:
    1. find largest increasing suffix
    2. get pivot
    3. find pivot's right-most successor in suffix

wulymammoth

Domain-driven Design (DDD)

Context mapping

Exercise to help us discover all the concepts living in our organization, and our systems

Get everyone in a room and discover the...

• Nouns - entities
• Verbs - events

wulymammoth

#!/usr/bin/env python
"""
Very simple HTTP server in python.

Usage::
    ./dummy-web-server.py [<port>]

Send a GET request::
    curl http://localhost

wulymammoth

#!/usr/bin/env python
"""
Very simple HTTP server in python.

Usage::
    ./simple_server.py [<port>]

Send a GET request::
    curl http://localhost

wulymammoth

Chapter 1 - Object Oriented Design

The purpose of design is to allow you to do design later, and it's primary goal is to reduce the cost of change.

SOLID Design:

• Single Responsibility Principle: a class should have only a single responsibility
• Open-Closed Principle: Software entities should be open for extension, but closed for modification (inherit instead of modifying existing classes).
• Liskov Substitution: Objects in a program should be replaceable with instances of their subtypes without altering the correctness of that program.
• Interface Segregation: Many client-specific interfaces are better than one general-purpose interface.

wulymammoth

function add(a, b) {
  return a + b;
}

const cases = [
  // [a, b], expectedAnswer
  [[1, 2], 3], // 3
  [[5,  5], 10],// 10
  [[-1, 2], 1], // 1
  [[1, 1], 2]

wulymammoth

/*
********************************************************************************
Golang - Asterisk and Ampersand Cheatsheet
********************************************************************************

Also available at: https://play.golang.org/p/lNpnS9j1ma

Allowed:
--------
p := Person{"Steve", 28} 	stores the value

wulymammoth

1. Change your database RDS instance security group to allow your machine to access it.
   • Add your ip to the security group to acces the instance via Postgres.
2. Make a copy of the database using pg_dump
   • $ pg_dump -h <public dns> -U <my username> -f <name of dump file .sql> <name of my database>
   • you will be asked for postgressql password.
   • a dump file(.sql) will be created
3. Restore that dump file to your local database.
   • but you might need to drop the database and create it first
   • $ psql -U <postgresql username> -d <database name> -f <dump file that you want to restore>

• the database is restored