Sam Yamashita sotayamashita

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written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.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.

ChangeLog を支える英語

ChangeLog を書く際によく使われる英語をまとめました。

ほとんど引用です。

基本形

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

Deploying a subfolder to GitHub Pages

Sometimes you want to have a subdirectory on the master branch be the root directory of a repository’s gh-pages branch. This is useful for things like sites developed with Yeoman, or if you have a Jekyll site contained in the master branch alongside the rest of your code.

For the sake of this example, let’s pretend the subfolder containing your site is named dist.

Step 1

Remove the dist directory from the project’s .gitignore file (it’s ignored by default by Yeoman).

Update May 2017

Eric Bidelman has documented some of the common workflows possible with headless Chrome over in https://developers.google.com/web/updates/2017/04/headless-chrome.

Update

If you're looking at this in 2016 and beyond, I strongly recommend investigating real headless Chrome: https://chromium.googlesource.com/chromium/src/+/lkgr/headless/README.md

Windows and Mac users might find using Justin Ribeiro's Docker setup useful here while full support for these platforms is being worked out.

	# Step 1: Set priveleges

	$ sudo /System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/Resources/kickstart -configure -allowAccessFor -allUsers -privs -all

	Starting...
	Setting allow all users to YES.
	Setting all users privileges to 1073742079.
	Done.

	# Step 2: Allow VNC clients

	#!/bin/bash
	# ssh-multi
	# D.Kovalov
	# Based on http://linuxpixies.blogspot.jp/2011/06/tmux-copy-mode-and-how-to-control.html

	# a script to ssh multiple servers over multiple tmux panes


	starttmux() {
	if [ -z "$HOSTS" ]; then

	#define LOG_DEBUG

	#define __PREPEND_DATE(format) ([NSString stringWithFormat:@"[%@] %@", [[[NSDate new] description] componentsSeparatedByString:@" "][1], [@"%@" stringByAppendingString:format]])
	#define SLog(args,...) do { [[NSFileHandle fileHandleWithStandardOutput] writeData:[[NSString stringWithFormat:__PREPEND_DATE(args), @"", ##__VA_ARGS__] dataUsingEncoding: NSUTF8StringEncoding]]; [[NSFileHandle fileHandleWithStandardOutput] writeData: [@"\n" dataUsingEncoding: NSUTF8StringEncoding]]; } while(0);

	#ifdef LOG_DEBUG
	#define NSLog SLog
	#endif

	// ALog always displays output regardless of the DEBUG setting

	/*
	* Commit And Push - CAP.
	* Cap function to add, commit and push.
	* Drop this in ~/.bash_profile
	* Usage - cap 'commit message'
	* - Andrew Hathaway
	*/

	cap() {
	git add . ; /* Add all changes */

	gifify() {
	if [[ -n "$1" ]]; then
	if [[ $2 == '--good' ]]; then
	ffmpeg -i $1 -r 10 -vcodec png out-static-%05d.png
	time convert -verbose +dither -layers Optimize -resize 600x600\> out-static*.png GIF:- \| gifsicle --colors 128 --delay=5 --loop --optimize=3 --multifile - > $1.gif
	rm out-static*.png
	else
	ffmpeg -i $1 -s 600x400 -pix_fmt rgb24 -r 10 -f gif - \| gifsicle --optimize=3 --delay=3 > $1.gif
	fi
	else