Perl Hash Indices List, keys() Function
What is keys() Function in Perl programming?
Explanation
The keys() function is used to retrieve list of indices from a hash.
keys hash;
#! C:programfilesperlbinperl
print "content-type: text/htmlnn";
%emp = ('empno' => '12422' , 'empname' => 'Kate Anderson',
'empph' => '9167552148', 'empcode' => 'ADS212');
foreach $key (keys %emp)
{
print "$keyn";
} Result :
empcode empname empph empno
In the above example using the keys() function all the keys of the hash "emp" is displayed using a for each loop.
Syntax:
keys hash;
Example :
#! C:programfilesperlbinperl
print "content-type: text/htmlnn";
%emp = ('empno' => '12422' , 'empname' => 'Kate Anderson',
'empph' => '9167552148', 'empcode' => 'ADS212');
foreach $key (keys %emp)
{
print "$keyn";
}
empcode empname empph empno
In the above example using the keys() function all the keys of the hash "emp" is displayed using a for each loop.
