珀尔 |有用的哈希函数

哈希是一组键值对。 Perl 存储散列的元素，以便根据其键搜索值。 Perl 提供了各种函数来对哈希执行操作，例如返回哈希值、从哈希中删除元素等。
例子：

#!/usr/bin/perl 
    
# Initializing hash  
%hash1 = ('Welcome' => 10, 'to' => 20, 'Geeks' => 80);  
    
# To delete the List passed as parameter 
$deleted_element = delete($hash1{'to'}); 
    
# Printing elements of Hash  
print "$hash1{'Welcome'}\n";  
print "$hash1{'to'}\n";  
print "$hash1{'Geeks'}\n";  
    
# Printing the deleted element 
print "Deleted element: $deleted_element"; 

输出：

10

80
Deleted element: 20

下面列出了 Perl 中一些有用的哈希运算函数：

Function	Description
values()	Returns the list of all the values stored in a Hash
keys()	Returns all the keys of the HASH as a list
each()	Returns a Two-element list consisting of the key and value pair in List context and key for the next element when called in scalar context
delete()	Used to delete the specified keys and their associated values from a hash, or the specified elements in the case of an array