andreobriennz

const isFizz = number => number % 5 === 0
const isBuzz = number => number % 3 === 0

const newArrayInRange = (min, max) => [...Array(max + 1).keys()].slice(min)

const fizzBuzz = (min, max) => newArrayInRange(min, max)
  .map(number => {
    if (isFizz(number) && isBuzz(number)) {
      return 'fizzbuzz'
    }

apolloclark

Postgres Cheatsheet

This is a collection of the most common commands I run while administering Postgres databases. The variables shown between the open and closed tags, "<" and ">", should be replaced with a name you choose. Postgres has multiple shortcut functions, starting with a forward slash, "". Any SQL command that is not a shortcut, must end with a semicolon, ";". You can use the keyboard UP and DOWN keys to scroll the history of previous commands you've run.

Setup

installation, Ubuntu

http://www.postgresql.org/download/linux/ubuntu/ https://help.ubuntu.com/community/PostgreSQL

stevenharman

h = {
  'a' => :a_value,
  'b' => nil,
  'c' => false
}

h.fetch('a', :default_value) #=> :a_value
h.fetch('b', :default_value) #=> nil
h.fetch('c', :default_value) #=> false
h.fetch('d', :default_value) #=> :default_value