Easily checkout local git branches with a ruby script

checkout_branch

#!/usr/bin/env ruby

branches = `git branch --sort=committerdate | awk '{print $1}'`.split("\n").reject{|l| l == '*'}
branches.each_with_index{|b, i| puts "#{i < 10 ? ' ' : ''}""#{i} - #{b}" }
puts "\n"
print 'type branch number: '

target_num = gets.chomp

unless target_num.length == 0
  system("git checkout #{branches[target_num.to_i]}")
end

To make this a no-brainer, run a chmod +x on the file and add an alias alias co="path to script"