Contents

• Written in C
• Some C
• C structs
• C structs inside Perl
• Different types of Scalar
• SvNULL - undef
• SvPV - string
• SvOOK
• SvIV - integer
• SvPVIV - string & integer
• Using our knowledge
• Read and validate
• Memory usage
• AV - array
• A naïve hash implementation
• Idealised hash implementation
• A hashing algorithm
• HV - hash
• Hash randomisation
• Perl's more complex bits
• The End