Jaewon Seo ENvironmentSet

This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

unspecified.cpp

이 문서는 제가 트위터에 냈던 문제의 해설입니다.

#include <vector>

using std::vector;

int main() {

경사스러운 일입니다. 이제 이 곳에 달리는 댓글을 막을 수 있어 그리 하게 되었습니다. 그래도 이전에 달렸던 댓글들은 아무래도 볼 수 있는 다른 방법이 인터넷 상에 존재하긴 하는 모양입니다.

난해한 혀엉... 언어 v0.4.5

…(U+2026), ⋯(U+22EF), ⋮(U+22EE)는 모두 .(U+002E)가 3번 연속으로 나열된 것과 같은 것으로 봅니다.
"한글 음절 문자"는 가(U+AC00) 이상 힣(U+D7A3) 이하의 유니코드 문자들을 의미합니다.

스택

How to add an image to a gist

Create a gist if you haven't already.

Clone your gist:

# make sure to replace `<hash>` with your gist's hash
git clone https://gist.github.com/<hash>.git # with https
git clone [email protected]:<hash>.git     # or with ssh

async/await is just the do-notation of the Promise monad

CertSimple just wrote a blog post arguing ES2017's async/await was the best thing to happen with JavaScript. I wholeheartedly agree.

In short, one of the (few?) good things about JavaScript used to be how well it handled asynchronous requests. This was mostly thanks to its Scheme-inherited implementation of functions and closures. That, though, was also one of its worst faults, because it led to the "callback hell", an seemingly unavoidable pattern that made highly asynchronous JS code almost unreadable. Many solutions attempted to solve that, but most failed. Promises almost did it, but failed too. Finally, async/await is here and, combined with Promises, it solves the problem for good. On this post, I'll explain why that is the case and trace a link between promises, async/await, the do-notation and monads.

First, let's illustrate the 3 styles by implementing

	{
	// http://eslint.org/docs/rules/

	"ecmaFeatures": {
	"binaryLiterals": false, // enable binary literals
	"blockBindings": false, // enable let and const (aka block bindings)
	"defaultParams": false, // enable default function parameters
	"forOf": false, // enable for-of loops
	"generators": false, // enable generators
	"objectLiteralComputedProperties": false, // enable computed object literal property names

	// by Dmitry Soshnikov

	ES7:

	== Lexical environment ==

	- Environment Record
	- parent (can be null)

	== Environment Record ==