Perl Hash Maps

values can be assigned to hash tables as

%states=

("California","Sacramento","Wisconsin","Madison","New York","Albany");

We can also use => operator to identify the

key to the left, and the value to the right; if the => operator

encounters bare words in key positions, they will be automatically

quoted (note “New York”, however, which consists of two words

and MUST be quoted

%states=

(California=>"Sacramento",Wisconsin=>"Madison","New York"=>"Albany");

In above example California is key and Sacromento is value.

Similarily Wisconsin is key and Madison is value.

Printing:

print "Capital of California is " . $states{"California"} . "nn";

printing all values(using for loop):

#!/usr/bin/perl

%states=

(California=>"Sacramento",Wisconsin=>"Madison","New York"=>"Albany");

foreach my $keys(keys %states)

{

  print "KEY:$keys VALUE:$states{$keys}n";



}



output

KEY:Wisconsin VALUE:Madison

KEY:New York VALUE:Albany

KEY:California VALUE:Sacramento