maiha

cronの多重起動防止

基本方針

pidof コマンドを使う (稼働中のプロセスIDを返す)

• || で繋げてコマンド実行すればOK
• /proc/$$/comm あたりと同じ動作なので、スクリプトの場合 bash が入ってしまう
• pidof -x foo のように -x を入れるとスクリプトは対応できる

誤検出

maiha

/* npm install acorn acorn-walk */
/* usage: nodejs print-func.js foo.js --call */

let mode  = 'name';
let index = process.argv.findIndex(function(e) { return e == "--call"});
if (index > 0) { process.argv.splice(index, 1); mode = 'call'; }

let filename = process.argv[2];
if (!filename) throw "file not found";

maiha

$ curl -H 'Accept-Encoding: gzip' http://staff.livedoor.blog/ > x1
$ crystal test.cr > x2

$ LC_ALL=C ls -l x1 x2
-rw-rw-r-- 1 maiha maiha 13786 Feb 10 10:00 x1
-rw-rw-r-- 1 maiha maiha 13602 Feb 10 10:06 x2

$ file x1 x2
x1: gzip compressed data, last modified: Sun Feb 10 01:00:48 2019, from Unix

maiha

nginx

location /sse/ {
  # enables EventSource support
  proxy_http_version 1.1;
  proxy_set_header Connection "";

  proxy_buffering off;
}

maiha

oauth2-proxy

docker-compose.yml

replace MYDOMAIN, MYHOST

version: '2'
services:
  oauth2-proxy-4181:

maiha

visual

• progress bar (simple)
  • https://codepen.io/Veronica18/pen/jpKWdx
• progress bar (useful)
  • https://github.com/rstacruz/nprogress
• like electro-cardiogram
  • https://jsfiddle.net/j46kxvj5/4/

maiha

tooltip: max-width

.tooltip-inner {
  white-space: pre-wrap;
  max-width: 100%;
}

table: prevent 100% width

maiha

目的

• 任意の日本語文章(UTF-8)を「ひらがな化」する

結論

• ipadic-utf8 で mecab -Oyomi | nkf --hiragana がバランスよさげ

$ ls -l dic
合計 0

maiha

• https://www.zdnet.com/article/how-to-upgrade-from-ubuntu-linux-16-04-to-18-04/

apt update
apt upgrade
apt dist-upgrade
apt autoremove
do-release-upgrade
# +00:01 [RETURN]
# +00:04 y

maiha

(SUMMARY)

Language	Library	Name	Type
C#	CsvHelper	QuoteAllFields	bool
Go	(stdlib)	N/A	N/A
Haskell	cassava	Quoting.QuoteAll	enum
Java	Apache Commons CSV	QuoteMode.ALL	enum
Python	(stdlib)	QUOTE_ALL	enum
Ruby	fastercsv	force_quotes	bool