How to understand php two-way queue
This article mainly explains "how to understand php two-way queue". The content of the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to understand php two-way queue".
1. Two-way queue is a kind of data structure with the properties of queue and stack.
2. Elements in a two-way queue can be popped up from both ends, and their limited insertions and deletions are carried out at both ends of the table.
A two-way queue is like a queue, but you can add or remove elements at either end.
Example
