| import qrcode | |
| from qrcode.util import * | |
| def hack_put(self, num, length): | |
| if num == 0: | |
| num = 233 # make a fake length | |
| for i in range(length): | |
| self.put_bit(((num >> (length - i - 1)) & 1) == 1) | |
| qrcode.util.BitBuffer.put = hack_put |
| [V=browser-hello.mp4] Hi, I'm Matthew from OpenResty Inc. In this video, I'll demonstrate how to implement a "hello world" HTTP interface using OpenResty. | |
| First of all, we make sure we are using OpenResty's nginx. | |
| [delay=0] $ export PATH=/usr/local/openresty/nginx/sbin:$PATH | |
| $ which nginx | |
| [S] It's usually in this path. | |
| And then we go to the home directory. |
Go提供了我们便利的进行并发编程的工具、方法和同步原语，同时也提供给我们诸多的犯错的机会，也就是俗称的“坑”。即使是顶级Go开发的项目，比如Docker、Kubernetes、gRPC、etcd， 都是有经验丰富的Go开发专家锁开发，也踩过不少的并发的坑，而且依然源源不断的继续踩着,即便是标准库也是这样。
分析和总结并发编程中的陷阱，避免重复踩在别人的坑中，正式本次培训课的重要内容。只有深入了解并发原语的实现，全面了解它们的特性和限制场景，注意它们的局限和容易踩的坑，才能提高我们的并发编程的能力。通过了解和学习其他人的经验和贡献的项目和库，我们可以更好的扩展我们的视野，避免重复的造轮子，或者说我们可以制作更好的轮子。
语言的内存模型定义了对变量的读写的可见性，可以清晰而准确读写事件的happen before关系。对于我们，可以很好地分析和编排goroutine的运行，避免数据的竞争和不一致的问题。
通过本次课程，你可以:
| # -*- coding: utf-8 -*- | |
| # Script to run UDP Server on 127.0.0.1:8126 | |
| # This mocks statsd server for testing | |
| import socket | |
| UDP_IP_ADDRESS = "127.0.0.1" | |
| UDP_PORT_NO = 8126 |
| $ git clone [email protected]:xxxxx/xxxx.git my-awesome-proj | |
| Cloning into 'my-awesome-proj'... | |
| ssh: connect to host github.com port 22: Connection timed out | |
| fatal: Could not read from remote repository. | |
| $ # This should also timeout | |
| $ ssh -T [email protected] | |
| ssh: connect to host github.com port 22: Connection timed out | |
| $ # but this might work |
| #!/bin/bash | |
| # | |
| # Author: bwangel<[email protected]> | |
| # Date:Oct,10,2017 14:16 | |
| LOG_FILE="./2017_10_10uwsgi-webapp.log" | |
| echo "" | awk ' | |
| END { | |
| FMT = "%-33s\t%-5s\t%-15s%-10s\n" |
| # use the latest ubuntu environment (18.04) available on travis | |
| dist: bionic | |
| language: go | |
| # You don't need to test on very old versions of the Go compiler. It's the user's | |
| # responsibility to keep their compiler up to date. | |
| go: | |
| - 1.16.x |
| #!/bin/bash | |
| # | |
| # Author: bwangel<[email protected]> | |
| # Date: Feb,10,2017 16:55 | |
| for C in {0..255}; do | |
| tput setaf $((255-${C})) | |
| tput setab $C | |
| echo -n "$C " | |
| done |
| #!/usr/bin/env python3 | |
| # -*- coding: utf-8 -*- | |
| """ | |
| 这个C元类的功能就是在准备类的命名空间的时候， | |
| 将其父类的非私有成员(不以_开头的成员)添加到 | |
| 这个命名空间中，然后在创建这个类的时候，再把父类的非私有成员给删除掉。 | |
| """ | |
| import os |
