ziyoung

const { EventEmitter } = require('event-emitter');

function mapAsync(iterable, mapper, option) {
  // consumer 控制 concurrency
}

function filterAsync(iterable, filterer) {
  // promise 控制
}

ziyoung

#!/usr/bin/env node

console.log('cli application');

process.on('rejectionHandled', error => {
    throw error;
});

ziyoung

# go build link
PKG_NAME = github.com/ziyoung/repo
GO_LDFLAGS = -X ${PKG_NAME}/pkg.Var=123

build:
	go build -ldflags "${GO_LDFLAGS}" -o file ./some-file.go

ziyoung

public class Run {
    @Target(ElementType.PARAMETER)
    @Retention(RetentionPolicy.RUNTIME)
    static @interface QueryParam {
        String value();
    }

    public void testAnnotation(@QueryParam("action") String action) {
        System.out.printf("action is %s\n", action);
    }

ziyoung

version: "3"

services:
  my-db:
    image: "mysql:5.7"
    container_name: "my-db"
    restart: always
    environment:
      MYSQL_ROOT_PASSWORD: 12345
    volumes:

ziyoung

# https://www.elastic.co/guide/en/elasticsearch/reference/current/docker.html
version: '3'
services:
  es01:
    image: elasticsearch:7.2.0
    container_name: es01
    environment:
      - node.name=es01
      - discovery.seed_hosts=es02
      - cluster.initial_master_nodes=es01,es02

ziyoung

const nodemailer = require('nodemailer');
const config = require('./config.json');

const wait = () => new Promise(resolve => setTimeout(resolve, 800));

async function main() {
  let transporter = nodemailer.createTransport({
    host: "email.example.com",
    port: 587,
    secure: false, // true for 465, false for other ports

ziyoung

指针的介绍

• 指针仅仅是指向计算机中的某个地址，并带有类型限定符。
• 你可以对一个指针使用数组的语法来访问指向的东西，也可以对数组的名字做指针的算数运算。
• 你应该每次尽可能使用数组，并且按需将指针用作提升性能的手段。

指针并不是数组

无论怎么样，你都不应该把指针和数组混为一谈。它们并不是相同的东西，即使C让你以一些相同的方法来使用它们

ziyoung

const genInlineComponentText = require('./build/md-loader/util').genInlineComponentText;

const template = '<el-input v-model="input" placeholder="请输入内容"></el-input>';

const script = `
export default {
  data() {
    return {
      input: ''
    }

ziyoung

# 下面的这个命令更简洁一些，docker image ls -f "dangling=true" -q
IMAGES=`docker images -f "dangling=true" -q`

docker rmi $IMAGES

# 更为简洁的命令
docker rmi -f $(docker images --filter "dangling=true" -q --no-trunc)