perl create hash

Perl Learning 5 Hash, perllearninghash [This article is original. Do not reprint it without permission] Hash is a data structure. It is similar to an array in that it can accommodate any number of values and can be used as needed. The difference between hash and array lies in the indexing method, arrays are indexed by

I am sorry to send a personal advertisement here. If you are interested, you can view it:Http://www.wachnew.com #! /Usr/bin/perl-W $ Family_name {"Fred"} = "flinkstone"; # assign a value to the hash key$ Family_name {"Barney"} = "rubble "; Foreach my $ person (QW/Fred Barney/) # Write the private variable declaration to foreach{Print "the $ person is: $ family_name {$ person}/N"; # output key and correspon

Basic usage # initialize % H as an empty array % H ={}; # use an array to initialize % H as a => 1, B => 2% H = ('A', 1, 'B', 2); % H = ('A' => 1, 'B' => 2); # If the key is a string, % H = (a => 1, B => 2) can be omitted. # Use {} to access print "$ H {A} n "; # Print $ H {B} = '2b '; print "$ H {B} n"; # print 2B # delete key using delete $ H {B }; # Delete 'B' from $ h to clear Perl hash UNDEF % H; obtai

The previous article lists the similarities and differences between the ways of objects and JS in Perl. This continues to complement the array, the hash of the associated operation. One, array You can add additions and deletions to the array. Unlike JS is that these functions are global, JS is hanging on the array.prototype. 1, the operation of the tail of the array POPs (delete the last element), push (

Basic usage #初始化%h is an empty array%h={};#用数组初始化%h for A=>1,b=>2%h= (' A ', 1, ' B ', 2);#意义同上 is just another, more figurative way of writing. %h= (' A ' =>1, ' B ' =>2);#如果key是字符串, you can omit the quotation marks. The following line is the same as the line above%h= (A=>1,B=>2);#用 {} To access print "$h {a}\n";#打印 $h {b}= ' 2b '; Print "$h {b}\n"; #打印2b#删除key用delete Delete$h{b}; #从 $h Delete ' B ' Empty Perl HashUndef%h; Get all the key values o

APR_DECLARE_NONSTD (unsigned int) apr_hashfunc_default (const char * char_key, apr_ssize_t * klen) { unsigned int hash = 0; const unsigned char * key = (const unsigned char *) char_key; const unsigned char * p; apr_ssize_t i; / * * This is the popular `times 33 'hash algorithm which is used by * perl and also appears in B

Copy codeThe Code is as follows :#! /Bin/perl Use strict; Use warnings; My % movies;My $ film;My % reverse_result;My $ director;My @ data; % Movies =('The shining' => 'kubrick ','Ten Commandments '=> 'demille ','Goonies '=> 'spielberg ',); # Output the hash value. The output result is Kubrick.Print $ movies {'the shining '}; # Simultaneously output keys and valuesForeach $ film (keys % movies){Print "$ fil

Copy Code code as follows: #!/bin/perl Use strict; Use warnings; My%movies; My $film; My%reverse_result; My $director; My @data; %movies = ( ' The Shining ' => ' Kubrick ', ' Ten Commandments ' => ' DeMille ', ' Goonies ' => ' Spielberg ', ); #输出哈希的值, the result of the output is Kubrick Print $movies {' The Shining '}; #同时输出键和值 foreach $film (keys%movies) { Print "$film is directed by $movies {$film}.\n"; } #添加空格 p

A description of the variable A variable is a data item whose value can change as the program runs. A variable can be anywhere in the program, and you do not need to declare it as a type of feature, as in a high-level language. The value of a variable can be a string, a number, or a combination of them. Second, the type of Perl variable A. Scalar type $ variable = value; B. A

1. Question 2. Code and Output Ch6-family-name.pl1 #-----------------------------------------------------------# 2 # Source: Learning Perl, chapter6, exercise-1 3 # Date: 2012-01-16 4 # Author: xiaodongrush 5 #-----------------------------------------------------------# 6 Use 5.010; 7% family_name_hash = ( 8 "Fred" => "Flintstone ", 9 "Barney" => "rubble ", 10 "Wilma" => "Flintstone ",); 11 12 while (13 chomp; 14 if (exists $ family_name_hash {$ _}){

--Create a hash partition table: Sql> CREATE TABLE T_partition_hash (ID number,name varchar2) 2 partition by hash (ID) (3 partition T_HASH_P1 T Ablespace tbspart01 4 partition t_hash_p2 tablespace tbspart02, 5 partition t_hash_p3 tablespace tbspart03, 6 PA Rtition T_HASH_P4 tablespace tbspart04); Table has been cre