dennisreimann

language: node_js

cache:
  # Yarn 2 does not store dependencies in node_modules anymore, at least not by default.
  # If you are using the node-modules plugin, remove the `npm: false` line.
  npm: false
  # Yarn 2 caches to the local .yarn directory, not the Travis default `$HOME/.yarn` 
  directories:
    - ./.yarn/cache

markmichon

class CircuitBreaker {
  constructor(request) {
    this.request = request
    this.state = "CLOSED"
    this.failureThreshold = 3
    this.failureCount = 0
    this.successThreshold = 2
    this.successCount = 0
    this.timeout = 6000
    this.nextAttempt = Date.now()

lucj

for node in node1 node2 node3;do
  multipass launch -n $node
done

# Init cluster on node1
multipass exec node1 -- bash -c "curl -sfL https://get.k3s.io | sh -"

# Get node1's IP
IP=$(multipass info node1 | grep IPv4 | awk '{print $2}')

hongbo-miao

// 1. Server
//    node index.js
//
// 2. Client
//   1) Start
//      telnet localhost 3001
//
//   2) Quit
//      Click Ctrl + ], then Ctrl + C

y0ngb1n

Docker Hub 镜像加速器

国内从 Docker Hub 拉取镜像有时会遇到困难，此时可以配置镜像加速器。Docker 官方和国内很多云服务商都提供了国内加速器服务。

Dockerized 实践 https://github.com/y0ngb1n/dockerized

配置加速地址

Ubuntu 16.04+、Debian 8+、CentOS 7+

animir

import { Request, Response } from 'express';
import { Body, Controller, Post, Req, Res } from '@nestjs/common';
import { UserService } from './user.service';
import * as Redis from 'ioredis';
import { RateLimiterRedis } from 'rate-limiter-flexible';

const redisClient = new Redis({enableOfflineQueue: false});

const maxWrongAttemptsByIPperDay = 100;
const maxConsecutiveFailsByUsernameAndIP = 5;

jayphelps

import { map, delay } from 'rxjs/operators';
import { TestScheduler } from 'rxjs/testing';
import { Action } from 'redux';
import { Epic, ofType, ActionsObservable, StateObservable } from 'redux-observable';

const scheduler = new TestScheduler((actual, expected) => {
  if (JSON.stringify(actual) !== JSON.stringify(expected)) {
    throw new Error(`Failing test

actual: ${JSON.stringify(actual, null, 2)}

bvaughn

React recently introduced an experimental profiler API. This page gives instructions on how to use this API in a production release of your app.

Table of Contents

• Profiling in production
  • Create React App
  • Webpack 4

Profiling in production

React DOM automatically supports profiling in development mode for v16.5+, but since profiling adds some small additional overhead it is opt-in for production mode. This gist explains how to opt-in.

bvaughn

This API was removed in React 17

---

Interaction tracing with React

React recently introduced an experimental profiler API. After discussing this API with several teams at Facebook, one common piece of feedback was that the performance information would be more useful if it could be associated with the events that caused the application to render (e.g. button click, XHR response). Tracing these events (or "interactions") would enable more powerful tooling to be built around the timing information, capable of answering questions like "What caused this really slow commit?" or "How long does it typically take for this interaction to update the DOM?".

With version 16.4.3, React added experimental support for this tracing by way of a new NPM package, scheduler. However the public API for this package is not yet finalized and will likely change with upcoming minor releases, so it should be used with caution.

SeppPenner

Installing Python 3.7.4 on Raspbian =================================

As of July 2018, Raspbian does not yet include the latest Python release, Python 3.7.4. This means we will have to build it ourselves, and here is how to do it.

1. Install the required build-tools (some might already be installed on your system).