Perl delete()函数
Perl中的 Delete() 函数用于删除散列中的指定键及其相关值,如果是数组,则用于删除指定的元素。这个操作只对单个元素或片断起作用。
语法: delete(LIST)
参数:
要被删除的LIST。
返回:
undef 如果键不存在,则返回与被删除的键相关的值。
例1: 在哈希上实现delete()操作
#!/usr/bin/perl
# Initializing hash
%hash1 = ('Geeks' => 45, 'for' => 30, 'Now' => 40);
# To delete the List passed as parameter
deleted_element = delete(hash1{'for'});
# Printing elements of Hash
print "hash1{'Geeks'}\n";
print "hash1{'for'}\n";
print "hash1{'Now'}\n";
# Printing the deleted element
print "Deleted element:deleted_element";
输出
45
40
Deleted element: 30
例2: 在数组上实现delete()。
#!/usr/bin/perl
# Initializing array
@array1 = (10, 20, 30, 40, 50, 60);
# To delete the array element at index 2
deleted_element = delete(@array1[2]);
# Printing elements of Array
print "Updated Array: @array1";
# Printing the deleted element
print "\nDeleted element:deleted_element";
输出
Updated Array: 10 20 40 50 60
Deleted element: 30