mirror of
https://github.com/krahets/hello-algo.git
synced 2024-12-25 16:06:27 +08:00
38 lines
875 B
Ruby
38 lines
875 B
Ruby
=begin
|
||
File: queue.rb
|
||
Created Time: 2024-04-06
|
||
Author: Xuan Khoa Tu Nguyen (ngxktuzkai2000@gmail.com)
|
||
=end
|
||
|
||
### Driver Code ###
|
||
if __FILE__ == $0
|
||
# 初始化队列
|
||
# Ruby 内置的队列（Thread::Queue) 没有 peek 和遍历方法，可以把 Array 当作队列来使用
|
||
queue = []
|
||
|
||
# 元素入队
|
||
queue.push(1)
|
||
queue.push(3)
|
||
queue.push(2)
|
||
queue.push(5)
|
||
queue.push(4)
|
||
puts "队列 queue = #{queue}"
|
||
|
||
# 访问队列元素
|
||
peek = queue.first
|
||
puts "队首元素 peek = #{peek}"
|
||
|
||
# 元素出队
|
||
# 清注意，由于是数组，Array#shift 方法时间复杂度为 O(n)
|
||
pop = queue.shift
|
||
puts "出队元素 pop = #{pop}"
|
||
puts "出队后 queue = #{queue}"
|
||
|
||
# 获取队列的长度
|
||
size = queue.length
|
||
puts "队列长度 size = #{size}"
|
||
|
||
# 判断队列是否为空
|
||
is_empty = queue.empty?
|
||
puts "队列是否为空 = #{is_empty}"
|
||
end
|