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ESM modules in node: npm edition

JavaScript in browsers has a new module system: ES modules. JavaScript in node.js has had a module system for years: CommonJS modules. JavaScript developers have nearly universally adopted node as the platform of choice for their tooling. Web application frameworks all use command-line tools written in node, pulling shared code from the npm registry, to build applications that run on the browser. Open-source code they find on npm is freely used in these applications. Browser app developers now have the following expectations:

• Code they write for their tooling uses the same language as their browser applications.
• Code they discover in npm's module registry is re-usable in the browser.

CommonJS modules do not work in the browser, but bundling tools like browserify and webpack have allowed CommonJS modules to be built into browser-ready code. Early implementations of ES modules rely on the CommonJS module system under the hood, as Babel transpiles ESM syntax into Common

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本文譯自 [Tokio internals: Understanding Rust's asynchronous I/O framework from the bottom up][tokio-internals]。
Thanks [David Simmons][david-simmons] for this awesome article!

[Tokio][tokio] 是 Rust 的開發框架，用於開發非同步 I/O 程式（asynchronous I/O，一種事件驅動的作法，可實現比傳統同步 I/O 更好的延伸性、效能與資源利用）。可惜的是，Tokio 過於精密的抽象設計，招致難以學習的惡名。即使我讀完教程後，依然不認為自己充分內化這些抽象層，以便推斷實際發生的事情。

從前的非同步 I/O 相關開發經驗甚至阻礙我學習 Tokio。我習慣使用作業系統提供的 selection 工具（例如 Linux epoll）當作起點，再轉移至 dispatch、state machine 等等。倘若直接從 Tokio 抽象層出發，卻沒有清楚了解 epoll_wait() 在何處及如何發生，我會覺得難以連結每個概念。Tokio 與 future-driven 的方法就好像一個黑盒子。

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Tutorial: Designing a GraphQL API

This tutorial was created by Shopify for internal purposes. We've created a public version of it since we think it's useful to anyone creating a GraphQL API.

It's based on lessons learned from creating and evolving production schemas at Shopify over almost 3 years. The tutorial has evolved and will continue to change in the future so nothing is set in stone.

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#!/bin/bash
set -e

# Building LLVM on OSX CMake setup script
#
# Required:
#   - clang by Xcode6 or later
#   - cmake
#   - ninja
#

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var script = document.createElement('script');
script.src = 'https://cdnjs.cloudflare.com/ajax/libs/prism/1.5.1/prism.js';
document.body.appendChild(script);

var csslink = document.createElement('link');
csslink.setAttribute('rel', 'stylesheet');
csslink.setAttribute('type', 'text/css');
csslink.setAttribute('href', 'https://cdnjs.cloudflare.com/ajax/libs/prism/1.5.1/themes/prism-solarizedlight.css');
document.getElementsByTagName('head')[0].appendChild(csslink);

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Keybase proof

I hereby claim:

• I am cybai on github.
• I am cybai (https://keybase.io/cybai) on keybase.
• I have a public key ASAKGCR8xr2NhsKcsW2xJCrrjEUhWBsmv7jMBXVY1vhKIwo

To claim this, I am signing this object:

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var USELESS_PROPERTIES = [];

function processContainer(container) {
  if (container instanceof CSSSupportsRule)
    if (!CSS.supports(container.conditionText))
      return false;
  if (container instanceof CSSMediaRule)
    if (!matchMedia(container.conditionText).matches)
      return false;
  if (container.media && container.media.mediaText)

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module Exercise where

import Prelude
import Data.AddressBook

import Data.Functor ((<$>))
import Data.List (filter, head, null, nubBy)
import Data.Maybe (Maybe)

-- 1.