ruby入门_哈希表

就是一个键值对对象

# defineperson={  "name" => "Tom",  "age" => "20",  "sex" => "male",  1 => 1,  2 => "abc"}# get valueputs "name = #{person["name"]}"puts "age = #{person["age"]}"puts "sex = #{person["sex"]}"puts "1 = #{person[1]}"puts "2 = #{person[2]}"# common methods# size = length# include? = has_key?puts "size = #{person.size}"puts "length = #{person.length}"puts "include?('name') = #{person.include?('name')}"puts "include?('error') = #{person.include?('error')}"puts "has_key?('name') = #{person.has_key?('name')}"puts "has_key?('error') = #{person.has_key?('error')}"person.delete(1)person.delete(2)puts "keys = #{person.keys}"puts "values = #{person.values}"# iterate methods# each = each_pairperson.each do |key,value|  puts "    key = #{key},value = #{value}"endputsperson.each_key do |key|  puts "    key = #{key}"endputsperson.each_value do |value|  puts "    value = #{value}"endputsperson.each_pair do |key,value|  puts "    key = #{key},value = #{value}"end

输出

name = Tom
age = 20
sex = male
1 = 1
2 = abc
size = 5
length = 5
include?('name') = true
include?('error') = false
has_key?('name') = true
has_key?('error') = false
keys = ["name", "age", "sex"]
values = ["Tom", "20", "male"]
    key = name,value = Tom
    key = age,value = 20
    key = sex,value = male


    key = name
    key = age
    key = sex


    value = Tom
    value = 20
    value = male


    key = name,value = Tom
    key = age,value = 20
    key = sex,value = male