samples.rb

# use e for elements of an Enumerable
Item.all.each { |e| puts e.name }

# use f for files
Dir["app/**/*.rb"].each { |f| require f }

# use ex for rescued Exceptions
begin
  open(uri)
rescue OpenURI::HttpError => ex
  puts "Unable to retrieve #{uri}"
end

# i, j for indices. this actually dates back to C/C++ days in college
for i in 1..10
  for j in i..10
    puts "#{i}, #{j}"
  end
end

# x, y, z numbers, definitely reminiscent of math
x, y = 5, 10
z = x * y