Be safe without messing up too much (source: https://icons8.com)

Short Ruby Tip: Guard clauses

Instead of wrap all of your code in an `if` statement and add unnecessary nesting like this:

def method
  if condition
    # code...
  end
end

You could use a guard clause to avoid unnecessary nesting:

def method
  return unless condition
  # code...
end

Real life examples

1. Return nil if …, otherwise return …

def method
  if condition
    # return some not nil value
  else
    nil
  end
end

becomes:

def method
  return nil unless condition
  # return some not nil value
end

2. Don’t execute something if …

def delete_all_data
  unless production?
    # delete all data from database...
  end
end

becomes:

def delete_all_data
  return if production?
  # delete all data from database...
end