larvata

ffmpeg Cheatsheet

-loglevel debug

• Join TS Files
• Convert TS to MP4
• Download Online AES-128 Encrypted HLS video
• Convert Video to GIF

52cik

npm set registry https://r.npm.taobao.org # 注册模块镜像
npm set disturl https://npm.taobao.org/dist # node-gyp 编译依赖的 node 源码镜像

## 以下选择添加
npm set sass_binary_site https://npm.taobao.org/mirrors/node-sass # node-sass 二进制包镜像
npm set electron_mirror https://npm.taobao.org/mirrors/electron/ # electron 二进制包镜像
npm set ELECTRON_MIRROR https://cdn.npm.taobao.org/dist/electron/ # electron 二进制包镜像
npm set puppeteer_download_host https://npm.taobao.org/mirrors # puppeteer 二进制包镜像
npm set chromedriver_cdnurl https://npm.taobao.org/mirrors/chromedriver # chromedriver 二进制包镜像
npm set operadriver_cdnurl https://npm.taobao.org/mirrors/operadriver # operadriver 二进制包镜像

gf3

/**
 * @flow
 */

import request from 'lib/request';

type F<T> = (response: T) => bool;

const BACKOFF_MAX = 60; // seconds
const BACKOFF_ATTEMPTS = 60;

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

7rack

原文

新老用户都可能遇到陷阱。下面我们列出频繁出现的问题，以及如何解决。 在 Freenode IRC #nginx 频道，我们经常看到这些问题。

[TOC]

关于本指南

最常见的是有人试图从其他指南拷贝配置片段。并非所有的指南是错误的，但绝大部分是有问题的。

henriquemenezes

# curl - Raw upload

curl -X PUT -T image.png https://example.com/upload

# curl - Content-Type: multipart/form-data

curl -F name=logo -F [email protected] https://example.org/upload

# curl - POST presigned URL (S3)

rbuckton

// Debug/Checked compilation 
const DEBUG = true;

function conditional(condition) {
    return target => condition ? target : Function.prototype;
} 

@conditional(DEBUG)
function assert(condition, message = "assertion failed.") {
    if (!condition) throw new Error(message);

iimos

function xpath(el) {
  if (typeof el == "string") return document.evaluate(el, document, null, 0, null)
  if (!el || el.nodeType != 1) return ''
  if (el.id) return "//*[@id='" + el.id + "']"
  var sames = [].filter.call(el.parentNode.children, function (x) { return x.tagName == el.tagName })
  return xpath(el.parentNode) + '/' + el.tagName.toLowerCase() + (sames.length > 1 ? '['+([].indexOf.call(sames, el)+1)+']' : '')
}

// Usage:

ygmpkk

#!/bin/bash

### USAGE
###
### ./ElasticSearch.sh 1.7 will install Elasticsearch 1.7
### ./ElasticSearch.sh will fail because no version was specified (exit code 1)
###
### CLI options Contributed by @janpieper
### Check http://www.elasticsearch.org/download/ for latest version of ElasticSearch

Yimiprod

/**
 * This code is licensed under the terms of the MIT license
 *
 * Deep diff between two object, using lodash
 * @param  {Object} object Object compared
 * @param  {Object} base   Object to compare with
 * @return {Object}        Return a new object who represent the diff
 */
function difference(object, base) {
	function changes(object, base) {