Basic HTML version of Foils prepared Sept 20 97

Foil 53 pack and unpack Functions -- II

From Perl5 and Advanced Perl4 Features Computational Science for Information Age Course CPS616 -- Sept 20 97. by Geoffrey C. Fox,Nancy McCracken,Tom Scavo
1 The last line finds encoded hex characters %XY with X,Y in set A-F,a-f,0-9 and replaces them by the "real" character representation
  • $1 is of course matched XY pair and "C" in pack first argument tells pack to generate character
  • hex() is a Perl built in function to convert HEX strings to decimal
2 General syntax is pack(TEMPLATE,LIST) where TEMPLATE is a string of identifiers specifying output style of successive characters
3 (A is Ascii, l signed long, p pointer, f Float etc.)
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