swoole-websocket-test
玩一下swoole的websocket
WebSocket是HTML5开始提供的一种在单个TCP连接上进行全双工通讯的协议。WebSocket通信协议于2011年被IETF定为标准RFC 6455,WebSocketAPI被W3C定为标准。
,在web私信,im等应用较多。背景和优缺点可以参看wiki。
环境准备
因为swoole官方还不支持windows,所以需要装下linux,之前都是用ubuntu,
这次就试一下centos7,还是满好看的,虽然虚拟机会默认最小安装,需要在安装
时自己选择带gnome的,当然最小安装也是可以的,只是最后需要改下防火墙。
然后是装下PHP,Nginx什么的,我是用Oneinstack,可以按需安装
给做这个的大大点个赞。
invert-binary-tree
Invert a binary tree
4
/ \
2 7
/ \ / \
1 3 6 9
to
4
/ \
7 2
/ \ / \
9 6 3 1
Trivia:
This problem was inspired by this original tweet by Max Howell:
Google: 90% of our engineers use the software you wrote (Homebrew),
but you can’t invert a binary tree on a whiteboard so fuck off.
1 | /** |
leetcode no.3
**Longest Substring Without Repeating Characters **
add-two-number
problem
You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list.
Input:(2 -> 4 -> 3) + (5 -> 6 -> 4)
Output: 7 -> 0 -> 8
分析(不用英文装逼了)
这个代码是抄来的,链接原作是这位大大。