ktravers

defmodule Account do
  import Account.Guards, only: [is_private: 2]

  def display_name(%{first: first, last: last, email: email}) when is_private(first, email) do
    "<<Redacted>>"
  end
  def display_name(%{first: first, last: last}) when not is_nil(first) do
    String.trim("#{first} #{last}")
  end
  def display_name(%{username: username}) when not is_nil(username) do

ktravers

# Not recommended: macros
defmodule Account.Guards do
  defmacro is_private(first_name, email) do
    quote do
      not(is_nil(unquote(first_name))) and
      not(unquote(email) == unquote(first_name))
    end
  end
end

ktravers

defmodule Account do
  def display_name(%{first: first, last: last}) when not is_nil(first) do
    String.trim("#{first} #{last}")
  end
  def display_name(%{username: username}) when not is_nil(username) do
   "#{username}"
  end
  def display_name(_), do: "New User"
end

ktravers

defmodule Account do
  # Unwieldy nil checks
  def display_name(%{first: nil, last: nil, username: nil}) do
    display_name(%{})
  end
  def display_name(%{first: nil, last: nil, username: username}) do
    display_name(%{username: username})
  end
  def display_name(%{first: nil, last: nil}), do: display_name(%{})

ktravers

defmodule Account do
  def display_name(%{first: first, last: last}) do
   String.trim("#{first} #{last}")
  end
  def display_name(%{username: username}), do: "#{username}"
  def display_name(_), do: "New User"
end

ktravers

def display_name(user)
  if user.first_name.length > 0
    if user.last_name.length > 0
      "#{user.first_name} #{user.last_name}".strip
    else
      "#{user.first_name}".strip
    end
  elsif user.username.length > 0
    user.username
  else

ktravers

export const displayName = (user) => {
 if (user.firstName.length > 0) {
   if (user.lastName.length > 0) {
     return `${user.firstName} ${user.lastName}`.trim();
   } else {
     return `${user.firstName}`.trim();
   }
 } else if (user.username.length > 0) {
   return user.username;
 } else {

ktravers

Open your Mac Terminal and run the following commands.

Hint: you can run the commands by copying and pasting them into your terminal, then hitting the Enter/Return key.

Let It Snow

ruby -e 'C=`stty size`.scan(/\d+/)[1].to_i;S=["2743".to_i(16)].pack("U*");a={};puts "\033[2J";loop{a[rand(C)]=0;a.each{|x,o|;a[x]+=1;print "\033[#{o};#{x}H \033[#{a[x]};#{x}H#{S} \033[0;0H"};$stdout.flush;sleep 0.1}'

ktravers

Command Line fun stuff

1. https://learn.co/curriculum/tracks/17595/lessons/17604
2. https://learn.co/lessons/hs-cli-cultural-piece

Let It Snow:

ruby -e 'C=`stty size`.scan(/\d+/)[1].to_i;S=["2743".to_i(16)].pack("U*");a={};puts "\033[2J";loop{a[rand(C)]=0;a.each{|x,o|;a[x]+=1;print "\033[#{o};#{x}H \033[#{a[x]};#{x}H#{S} \033[0;0H"};$stdout.flush;sleep 0.1}'

ktravers

default: &default
  adapter: postgresql
  pool: 5
  timeout: 5000
  encoding: unicode

development:
  <<: *default
  database: app_name_development