tralston

# Find the MD5 sum of the current directory
find . -type f -not -path "./.git/*" -print0 | xargs -0 md5 | md5

tralston

# List all the gems and versions used in your rails project
bundle show

# Use this to list an individual gem's location. Note that the regular "bundle show" doesn't tell you when a dependency is broken
bundle show <gem>

# Perform "bundle show <gem>" but for all the gems
bundle show | sed -e 's/  \* //g' | sed -e 's/ (.*//g' | xargs -I {} bundle show {}

# Try using bundle install 

tralston

# Remove unused gems, clean up broken dependencies
# Use with bundle show <gem> to resolve LoadError problems for gems that are installed but not seen by Rails
gem clean <gem>

# Remove accumulated gem documentation (ri and rdoc)
rm -r `gem env gemdir`/doc

tralston

solution = 0
(1...1000).each do |n|
  if n % 3 == 0 or n % 5 == 0
    solution += n
  end
end
solution