Helpful ruby oneliners

hacks.rb

# create random groups of people
%w(james bob alice eve tux).shuffle.each_slice(2).to_a 
# => [["bob", "eve"], ["alice", "tux"], ["james"]]

# assign random tools to people (tools can be empty)
people = %w(james bob alice eve tux)
tools = %w(hammer chainsaw screwdriver)
people.shuffle.zip(tools)
# => [["alice", "hammer"], ["james", "screwdriver"], ["tux", "chainsaw"], ["bob", nil], ["eve", nil]]