soomtong

/**
* Convert From/To Binary/Decimal/Hexadecimal in JavaScript
* https://gist.github.com/faisalman
*
* Copyright 2012-2015, Faisalman <fyzlman@gmail.com>
* Licensed under The MIT License
* http://www.opensource.org/licenses/mit-license
*/

(function(){

soomtong

Comparing node.js GPIO implementations

Here are two simple programs testing the performance of my rpio library against popular alternatives which use the /sys interface (with the number of npm stars indicated for a rough idea of popularity).

rpi-gpio (9 stars)

This test is based on an example on the rpi-gpio page.

As modules which uses /sys depend upon asynchronous behaviour they require callbacks to ensure that the next operation starts only when the previous one has completed.

soomtong

한글과 유니코드

유니코드에서 한글을 어떻게 다루는지를 정리하였다.

유니코드

• 유니코드(Unicode)는 전 세계의 모든 문자를 컴퓨터에서 일관되게 표현하고 다룰 수 있도록 설계된 산업 표준 (위키 백과)
• 단순히 문자마다 번호를 붙임
• 계속 업데이트되며 현재는 Unicode Version 9.0.0 이 최신이다.

UTF

• 유니코드를 실제 파일 등에 어떻게 기록할 것인지를 표준화한 것이다.

soomtong

from: http://www.meandmark.com/keycodes.html
Virtual Keycodes for the Mac QWERTY Layout

Keycodes are in hexadecimal. A blank entry means either there is no key assigned to that keycode or I was unable to find the assigned key.

Keycode    Key
0x00        A
0x01        S
0x02        D
0x03        F

soomtong

# require 'active_support/all'
def korean_topic_marker(str)
  k = str[-1] # last one char
  return '는' if k.mb_chars.decompose.size < 3 # 종성이 없는 경우 
  return '은'
end


def korean_subject_marker(str)
  k = str[-1] # last one char

soomtong

#!/usr/bin/env node
if (process.mainModule === module) setImmediate(() => main(process.argv).catch(e => console.log(e.stack) && process.exit(1)))

async function main(argv) {
  console.log(argv.slice(2))
}

soomtong

# delete local tag '12345'
git tag -d 12345
# delete remote tag '12345' (eg, GitHub version too)
git push origin :refs/tags/12345
# alternative approach
git push --delete origin tagName
git tag -d tagName

soomtong

'use strict';

const crypto = require('crypto');

const ENCRYPTION_KEY = process.env.ENCRYPTION_KEY; // Must be 256 bits (32 characters)
const IV_LENGTH = 16; // For AES, this is always 16

function encrypt(text) {
 let iv = crypto.randomBytes(IV_LENGTH);
 let cipher = crypto.createCipheriv('aes-256-cbc', Buffer.from(ENCRYPTION_KEY), iv);

soomtong

/* 
Proof of concept: Writing dual-mode (sync and async) code via generators

Recommendation: start by reading the example (at the end).

API:
– The API object is called `def`.
– Dual-mode `await`: const unwrapped = yield wrapped;
– Dual-mode `yield`: yield def.$one(singleValue)
– Dual-mode `yield*`: yield def.$all(iterable)

soomtong

(defun save-framegeometry ()
  "Gets the current frame's geometry and saves to ~/.emacs.d/framegeometry."
  (let (
        (framegeometry-left (frame-parameter (selected-frame) 'left))
        (framegeometry-top (frame-parameter (selected-frame) 'top))
        (framegeometry-width (frame-parameter (selected-frame) 'width))
        (framegeometry-height (frame-parameter (selected-frame) 'height))
        (framegeometry-file (expand-file-name "~/.emacs.d/framegeometry"))
        )