Arrays and Hashes

Hash Slices

• Multiple hash entries can be accessed simultaneously (just like array slices ).
• The leading character to identify a hash slice is not the % as you might expect (or as I expected anyway), but rather is the @ character.
• Example:
  

  # Set the hash entries in hash %theHash identified by keys "one", 
  # "two", and "three" to be 11, 22, and 33 respectively 
  @theHash{"one", "two", "three"} = (11, 22, 33); 
  

• This can be used to combine two hashes in a very efficient manner.
• Example:
  

  # Combine hashes %HashOne and %HashTwo ineffeciently 
  %HashOne = (%HashOne, %HashTwo); 
  # Combine hashes %HashOne and %HashTwo effeciently 
  %HashOne{keys(%HashTwo)} = (values(%HashTwo));