e4.rb

def func_any(hash)
  # Check and return true if any key object within the hash is of the type Integer
  # If not found, return false.
  hash.any?{ |key, value| key.integer? }  
end

def func_all(hash)
  # Check and return true if all the values within the hash are Integers and are < 10
  # If not all values satisfy this, return false.
  hash.all?{ |key, value| value.integer? and value < 10 }
end

def func_none(hash)
  # Check and return true if none of the values within the hash are nil
  # If any value contains nil, return false.
  hash.none?{ |key, value| value.nil? }
end

def func_find(hash)
  # Check and return the first object that satisfies either of the following properties:
  #   1. There is a [key, value] pair where the key and value are both Integers and the value is < 20 
  #   2. There is a [key, value] pair where the key and value are both Strings and the value starts with `a`.
  hash.find{ |key, value| (( key.is_a? Integer and value.is_a? Integer and value < 20 ) or
  ( key.string? and value.string? and value[0] == 'a' )) }
end