vin0010

// No Security

{
  "rules": {
    ".read": true,
    ".write": true
  }
}

vin0010

require 'csv'
 
file = "#{Rails.root}/public/data.csv"
 
table = User.all;0 # ";0" stops output.  Change "User" to any model.
 
CSV.open( file, 'w' ) do |writer|
  writer << table.first.attributes.map { |a,v| a }
  table.each do |s|
    writer << s.attributes.map { |a,v| v }

vin0010

Studying for a Tech Interview Sucks, so Here's a Cheat Sheet to Help

This list is meant to be a both a quick guide and reference for further research into these topics. It's basically a summary of that comp sci course you never took or forgot about, so there's no way it can cover everything in depth. It also will be available as a gist on Github for everyone to edit and add to.

Data Structure Basics

###Array ####Definition:

• Stores data elements based on an sequential, most commonly 0 based, index.
• Based on tuples from set theory.