too long has this list been quiet. but i have a fun question. i am
writing up slides for an all about hashes class. one goal i have is to
list and explain as many different uses for hashes as reasonably
possible. i have a short list to start with but i am sure the hive mind
of fwp can scrape up a bunch more. each one should have a name and not
overlap too much with any of this list (my initial list should be
obvious to you).
dispatch table
call code ref based on a key
isa
is a key valid? (not same as in a set). isa usually works on
fixed sets of keys
my @foos = qw( axxj djdj whwh ) ;
my %is_a_foo = map { $_ => 1 } @foos
mapping/conversion
short month to long month
records
single row from a db or similar
data structures
hash refs are the core to most deeper data structures
sets
set of active objects in a class. plenty of other examples
sparse arrays
saves major space when you have very few entries in a
very large array.
thanx,
uri
--
Uri Guttman ------ [EMAIL PROTECTED] -------- http://www.stemsystems.com
--Perl Consulting, Stem Development, Systems Architecture, Design and Coding-
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