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crazylion lee

Google Open Source Blog: Omnitone: Spatial audio on the web - 0 views

opensource.googleblog.com/...tone-spatial-audio-on-web.html

audio google spatial

shared by crazylion lee on 30 Jan 17 - No Cached
  • crazylion lee on 30 Jan 17
     
    "Omnitone: Spatial audio on the web"
crazylion lee

Chart.js | Open source HTML5 Charts for your website - 0 views

www.chartjs.org

chart html5 javascript library

shared by crazylion lee on 27 Apr 16 - No Cached
  • crazylion lee on 27 Apr 16
     
    " Simple yet flexible JavaScript charting for designers & developers"
crazylion lee

Mailtrain | Self hosted email newsletter app - 1 views

mailtrain.org

newsletter mailchimp open souce

shared by crazylion lee on 16 Apr 16 - No Cached
  • crazylion lee on 16 Apr 16
     
    "Self hosted newsletter app built on top of Nodemailer"
crazylion lee

QOR Go (Golang) SDK: the Go Open Source E-Commerce & CMS SDK - 0 views

getqor.com/en

go ec opensource cms

shared by crazylion lee on 24 Apr 16 - No Cached
  • crazylion lee on 24 Apr 16
     
    "QOR: the SDK for E-Commerce & CMS development, written in Go "
張 旭

从达标到卓越 -- API 设计之道 | Taobao FED | 淘宝前端团队 - 0 views

taobaofed.org/...index.html

api system development programming taobao

shared by 張 旭 on 21 Feb 17 - No Cached
  • 高级语言和自然语言（英语）其实相差无几，因此正确地使用（英语的）词法和语法是程序员最基本的素养。
  • 只要能够足够接近人类的日常语言和思维，并且不需要引发额外的大脑思考，那就是易用
  • 词法和语法
  • ...53 more annotations...
  • 语义
  • 版本控制
  • 正确地拼写一个单词是底线
  • 认真地注意 IDE 的 typo 提示（单词拼写错误提示）
  • state 是整个 Component 状态机中的某一个特定状态，既然描述为了状态机，那么状态和状态之间是互相切换的关系。所以对于初始状态，用 initial 来修饰。
  • props 是指 Element 的属性，要么是不存在某个属性值后来为它赋值，要么是存在属性的默认值后来将其覆盖。所以这种行为，default 是合理的修饰词。
  • 成对出现的词应该是：show & hide、open & close。
  • 成对出现的正反义词不可混用
  • 在复数的风格上保持一致，要么所有都是 -s，要么所有都是 -list。
  • 涉及到诸如字典（Dictionary）、表（Map）的时候，不要使用复数！
  • 「map」本身已经包含了这层意思，不需要再用复数去修饰它
  • 最好遵从惯例，使用名词组合 success 和 failure
  • 方法命名用动词
  • 属性命名用名词
  • 布尔值类型用形容词
  • 首字母缩写词的所有字母均大写。（如果某个语言环境有明确的业界惯例，则遵循惯例。）
  • 如果什么都没定，也没业界惯例，那么把单词写全了总是不会错的。
  • React 采用了 componentDidMount 这种过去时风格，而没有使用 componentMounted，从而跟 componentWillMount 形成对照组，方便记忆。
  • 尽量避免使用被动语态。因为被动语态看起来会比较绕，不够直观，因此我们要将被动语态的 API 转换为主动语态。
  • 无论是友好的参数设置，还是让人甜蜜蜜的语法糖，都体现了程序员的人文关怀。
  • 在文件（file）层面同样如此，一个文件只编写一个类，保证文件的职责单一（当然这对很多语言来说是天然的规则）。
  • 将混杂在一个大坨函数中的两件独立事情拆分出去，保证函数（function）级别的职责单一。
  • 现实中的 OOP 编程场景难免触及副作用。
  • 函数本身的运行稳定可预期
  • 函数的运行不对外部环境造成意料外的污染
  • SPM 是阿里通用的埋点统计方案
  • 对外部造成污染一般是两种途径：一是在函数体内部直接修改外部作用域的变量，甚至全局变量；二是通过修改实参间接影响到外部环境，如果实参是引用类型的数据结构。
  • 控制读写权限
  • 优化参数顺序。相关性越高的参数越要前置
  • 可省略的参数后置，以及 为可省略的参数设定缺省值
  • 将可省参数后置同样是最佳实践。
  • 重载（overload）
  • 如果入口参数无法进行有效区分，不要选择重载
  • 根本不明白某个 Boolean 标记位是用来干嘛的，这大大降低了用户的开发体验，以及代码可读性。
    • 張 旭
      張 旭 on 21 Feb 17
       
      我在 ADATA 的 message saver 犯了一樣的錯誤。
  • 同时支持单个和批量的处理，可以降低用户的认知负担。
  • 让 setter 型 API 始终返回 this。这是 jQuery 为我们带来的经典启示 —— 通过返回 this，来产生一种「链式调用（chaining）」的风格
  • 对异步操作都返回一个 Promise
  • 对于一些创造出来的、业务特色的词汇，如果不能用英语简明地翻译，就直接用拼音
  • 一致性可以最大程度降低信息熵
  • 打 log 要么都用中文，要么都用英文。
  • 所有的 setter 操作必须返回 this
  • 「大版本号」即「语义化版本命名」<major>.<minor>.<patch> 中的第一位 <major> 位
  • 接口的扩展方式有很多，比如：继承（extend）、组合（mixin）、装饰（decorate）
  • 在逻辑上确实存在派生关系，并且需要沿用基类行为同时自定义行为的，采用重量级的继承
  • 仅仅是扩充一些行为功能，但是逻辑上压根不存在父子关系的，使用组合
  • 装饰手法更多应用于给定一个接口，将其包装成多种适用于不同场景新接口的情况
  • $.fn.customMethod = function() {};
  • 合理的做法是新增一个 subType 字段
  • 抽象级别一般来说越高越好，将 API 设计成业务无关的，更通用，而且方便扩展
  • 利用多态性（Polymorphism）构建 Consistent APIs。
  • 作为 API 的开发者，一定要提供足够场景适用的 API，来引导我们的用户，不要让他们做出一些出人意料的「妙用」之举
  • 写代码，就像写作，而设计 API 好比列提纲。
  • Think about future, design with flexibility, but only implement for production.
張 旭

certificate - What is a Pem file and how does it differ from other OpenSSL Generated Ke... - 0 views

serverfault.com/...her-openssl-generated-key-file

https security server apache nginx system

shared by 張 旭 on 22 Feb 17 - No Cached
  • Certificate Signing Request.
  • Some applications can generate these for submission to certificate-authorities
  • These get signed by the CA and a certificate is returned
  • ...15 more annotations...
  • The returned certificate is the public certificate (which includes the public key but not the private key), which itself can be in a couple of formats.
  • this is a container format that may include just the public certificate (such as with Apache installs, and CA certificate files /etc/ssl/certs), or may include an entire certificate chain including public key, private key, and root certificates
  • Privacy Enhanced Mail (PEM), a failed method for secure email but the container format it used lives on
  • This is a PEM formatted file containing just the private-key of a specific certificate and is merely a conventional name and not a standardized one.
  • The rights on these files are very important
  • /etc/ssl/private
  • OpenSSL can convert these to .pem
  • .cert .cer .crt A .pem (or rarely .der) formatted file with a different extension
  • there are four different ways to present certificates and their components
  • used preferentially by open-source software
  • It can have a variety of extensions (.pem, .key, .cer, .cert, more)
  • The parent format of PEM
  • a binary version of the base64-encoded PEM file.
  • PEM on it's own isn't a certificate, it's just a way of encoding data
  • X.509 certificates are one type of data that is commonly encoded using PEM.
張 旭

Transactions - RSpec Rails - RSpec - Relish - 0 views

relishapp.com/...transactions

rspec test rails programming

shared by 張 旭 on 03 Apr 17 - No Cached
  • before(:all) hooks are invoked before the transaction is opened. You can use this to speed things up by creating data once before any example in a group is run
張 旭

Getting Started with Docker - Servers for Hackers - 0 views

serversforhackers.com/getting-started-with-docker

docker system virtualization

shared by 張 旭 on 30 Apr 15 - No Cached
  • Docker is an isolated portion of the host computer, sharing the host kernel (OS) and even its bin/libraries if appropriate.
  • the Docker Container contains the parts that make Ubuntu different from CoreOS.
  • A Docker container only stays alive as long as there is an active process being run in it.
  • ...10 more annotations...
  • Allocate a (pseudo) tty
  • Keep stdin open (so we can interact with it)
  • Docker allows us make changes to an image, commit those changes, and then push those changes out somehwere.
  • Docker tracks any changes we make to a container
  • The Dockerfile provides a set of instructions for Docker to run on a container.
  • what image (and tag in this case) to base this off of
  • run the given command (as user "root")
  • copy a file from the host machine into the container
  • expose a port to the host machine. You can expose multiple ports
  • run a command
crazylion lee

Alchemy - Open Source AI - 1 views

alchemy.cs.washington.edu/

datamining ai opensource

shared by crazylion lee on 07 Dec 15 - Cached
  • crazylion lee on 07 Dec 15
     
    "Welcome to the Alchemy system! Alchemy is a software package providing a series of algorithms for statistical relational learning and probabilistic logic inference, based on the Markov logic representation. Alchemy allows you to easily develop a wide range of AI applications, including:"
張 旭

The Caddyfile Syntax - 0 views

caddyserver.com/caddyfile

caddy proxy HA

shared by 張 旭 on 12 Sep 18 - No Cached
  • A Caddyfile can be used to configure any Caddy server type: HTTP, DNS, etc.
  • The Caddyfile is plain Unicode text encoded with UTF-8.
  • lowercase and uppercase characters are different.
  • ...17 more annotations...
  • A token that starts with quotes " is read literally (including whitespace) until the next instance of quotes " that is not escaped.
  • Only quotes are escapable.
  • Blank, unquoted lines are allowed and ignored.
  • Tokens are then evaluated by the parser for structure.
  • A Caddyfile has no global scope.
  • A label is a string identifier, and a definition is a body (one or more lines) of tokens grouped together in a block
  • a Caddyfile with more than one entry must enclose each definition in curly braces { }.
  • The first line of a Caddyfile is always a label line.
  • If many labels are to head a block, the labels may be suffixed with a comma.
  • as long as the last label of the line has a comma if the next line is to continue the list of labels
  • Commas are not acceptable delimiters for arguments
  • Arguments are delimited solely by same-line whitespace
  • Subdirectives cannot open new blocks.
  • nested directive blocks are not supported
  • Any token (label, directive, argument, etc.) may contain or consist solely of an environment variable
  • Where an import line is, that line will be replaced with the contents of the imported file, unmodified.
  • define snippets to be reused later in your Caddyfile by defining a block with a single-token label surrounded by parentheses
張 旭

How To Create a Kubernetes Cluster Using Kubeadm on Ubuntu 18.04 | DigitalOcean - 0 views

www.digitalocean.com/...-using-kubeadm-on-ubuntu-18-04

cluster ubuntu kubernetes system

shared by 張 旭 on 27 Mar 19 - No Cached
  • A pod is an atomic unit that runs one or more containers.
  • Pods are the basic unit of scheduling in Kubernetes: all containers in a pod are guaranteed to run on the same node that the pod is scheduled on.
  • Each pod has its own IP address, and a pod on one node should be able to access a pod on another node using the pod's IP.
  • ...12 more annotations...
  • Communication between pods is more complicated, however, and requires a separate networking component that can transparently route traffic from a pod on one node to a pod on another.
  • pod network plugins. For this cluster, you will use Flannel, a stable and performant option.
  • Passing the argument --pod-network-cidr=10.244.0.0/16 specifies the private subnet that the pod IPs will be assigned from.
  • kubectl apply -f descriptor.[yml|json] is the syntax for telling kubectl to create the objects described in the descriptor.[yml|json] file.
  • deploy Nginx using Deployments and Services
  • A deployment is a type of Kubernetes object that ensures there's always a specified number of pods running based on a defined template, even if the pod crashes during the cluster's lifetime.
  • NodePort, a scheme that will make the pod accessible through an arbitrary port opened on each node of the cluster
  • Services are another type of Kubernetes object that expose cluster internal services to clients, both internal and external.
  • load balancing requests to multiple pods
  • Pods are ubiquitous in Kubernetes, so understanding them will facilitate your work
  • how controllers such as deployments work since they are used frequently in stateless applications for scaling and the automated healing of unhealthy applications.
  • Understanding the types of services and the options they have is essential for running both stateless and stateful applications.
張 旭

cryptography - What's the difference between SSL, TLS, and HTTPS? - Information Securit... - 0 views

security.stackexchange.com/...ence-between-ssl-tls-and-https

security ssl system https

shared by 張 旭 on 23 Jun 17 - No Cached
  • TLS is the new name for SSL
  • HTTPS is HTTP-within-SSL/TLS
  • SSL (TLS) establishes a secured, bidirectional tunnel for arbitrary binary data between two hosts
  • ...10 more annotations...
  • HTTP is meant to run over a bidirectional tunnel for arbitrary binary data; when that tunnel is an SSL/TLS connection, then the whole is called "HTTPS".
  • "SSL" means "Secure Sockets Layer".
  • "TLS" means "Transport Layer Security".
  • The name was changed to avoid any legal issues with Netscape so that the protocol could be "open and free" (and published as a RFC).
    • 張 旭
      張 旭 on 23 Jun 17
       
      看起來其實就指同一件事，只是講 TLS 可以避開 SSL 這個有產權糾紛的名諱。
  • not just Internet-based sockets
  • "HTTPS" is supposed to mean "HyperText Transfer Protocol Secure",
  • Other protocol acronyms have been built the same way, e.g. SMTPS, IMAPS, FTPS... all of them being a bare protocol that "got secured" by running it within some SSL/TLS.
  • To make the confusing perfect: SSL (secure socket layer) often refers to the old protocol variant which starts with the handshake right away and therefore requires another port for the encrypted protocol such as 443 instead of 80.
  • TLS (transport layer security) often refers to the new variant which allows to start with an unencrypted traditional protocol and then issuing a command (usually STARTTLS) to initialize the handshake.
  • Whether you use SSL or TLS for this depends on the configuration of your browser and of the server (there usually is an option to allow SSLv2, SSLv3 or TLS 1.x).
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