Keita-N

## gist:badd0b4cbe774a22d0c92a3ec9e7df43

      
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                Keita-N
                / gist:badd0b4cbe774a22d0c92a3ec9e7df43
            
            
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              April 4, 2022 15:24
            
              
                Ubuntu ホストのタイムゾーンを変更する方法
              
          
    timezone を変更
sudo timedatectl set-timezone UTC

timezone の一覧を確認
timedatectl list-timezones


## json2csv.rb
require 'csv'
require 'json'

lines = readlines.join('')
json = JSON.parse(lines)

puts json.first.map{ |k,v| k }.join(',')
json.each do |node|
  puts node.map { |k,v| v }.join(',')
end

## gist:7fd5f565903f87d8aa013ab28ee2eb69
git fetch origin
git reset --hard origin/master

## gist:0e277b811f74ae46ce94aef63ce406d7
brew info postgresql

```
/usr/local/Cellar/postgresql/9.5.4 (3,147 files, 35MB)
  Poured from bottle on 2016-09-05 at 10:59:38
/usr/local/Cellar/postgresql/9.6.2 (3,251 files, 36.5MB) *
  Poured from bottle on 2017-03-13 at 13:20:21
 ```

mkdir /usr/local/var/postgres9.6.2

## SkipTriangularNumbers.scala
{def f(a:Int,n:Int,m:Int):Stream[Int]=if(a==m)f(a+n,n+1,m+1)else m #::f(a,n,m+1)
  f(1,2,1)}.takeWhile(_<101).foreach(println)

## index.html
<!DOCTYPE html>
<html>
<head>
  <title>Splite Animation Sample</title>
  <script type="text/javascript" src="splite.js"></script>
</head>
<body>
  <div id="canvasDiv"></div>
</body>
</html>

## concat_captures.sh
# ffmpegで動画のキャプチャを取得
ffmpeg -i input.mp4 -s 320x180 -r 10 -f image2 output-%03d.jpeg

# ImageMagickで画像を連結
convert -append output-*.jpeg conncat.jpeg

## stateMachine.js
// state machine
var stm = {
  'stateA': {
    events: {
      'ev1': function(){
        this.state = 'stateB';
        // a certain action
      },
      'ev2': function(){
        this.state = 'stateC';

## fibonacci.rb
def fib(n)
	return 0 if n == 0
	return 1 if n == 1
	fib(n - 1) + fib(n - 2)
end

def fib2(n)
	fib_iter2(1, 0, n)
end

## queue.rb
require 'thread'

queue = Queue.new
(1..1000).each { |i| queue.push i }

threads = []
concurrency = 5
concurrency.times do |thread_id|
  threads << Thread.new(thread_id) { |id|
    until queue.empty?
	require 'csv'
	require 'json'

	lines = readlines.join('')
	json = JSON.parse(lines)

	puts json.first.map{ \|k,v\| k }.join(',')
	json.each do \|node\|
	puts node.map { \|k,v\| v }.join(',')
	end
	brew info postgresql

	```
	/usr/local/Cellar/postgresql/9.5.4 (3,147 files, 35MB)
	Poured from bottle on 2016-09-05 at 10:59:38
	/usr/local/Cellar/postgresql/9.6.2 (3,251 files, 36.5MB) *
	Poured from bottle on 2017-03-13 at 13:20:21
	```

	mkdir /usr/local/var/postgres9.6.2
	{def f(a:Int,n:Int,m:Int):Stream[Int]=if(a==m)f(a+n,n+1,m+1)else m #::f(a,n,m+1)
	f(1,2,1)}.takeWhile(_<101).foreach(println)
	<!DOCTYPE html>
	<html>
	<head>
	<title>Splite Animation Sample</title>
	<script type="text/javascript" src="splite.js"></script>
	</head>
	<body>
	<div id="canvasDiv"></div>
	</body>
	</html>
	# ffmpegで動画のキャプチャを取得
	ffmpeg -i input.mp4 -s 320x180 -r 10 -f image2 output-%03d.jpeg

	# ImageMagickで画像を連結
	convert -append output-*.jpeg conncat.jpeg
	// state machine
	var stm = {
	'stateA': {
	events: {
	'ev1': function(){
	this.state = 'stateB';
	// a certain action
	},
	'ev2': function(){
	this.state = 'stateC';
	def fib(n)
	return 0 if n == 0
	return 1 if n == 1
	fib(n - 1) + fib(n - 2)
	end

	def fib2(n)
	fib_iter2(1, 0, n)
	end
	require 'thread'

	queue = Queue.new
	(1..1000).each { \|i\| queue.push i }

	threads = []
	concurrency = 5
	concurrency.times do \|thread_id\|
	threads << Thread.new(thread_id) { \|id\|
	until queue.empty?