karlpokus

Submit PR via https://docs.npmjs.com/cli/link

What you want

• You want B to depend on A but
• A is not on npm (or it is - but you don't feel like publishing after each fix)

npm link

• While standing in A npm link makes a global package of A. Verify by npm ls -g --depth=0.
• A can then be used by B by doing npm link A while inside B. Verify by npm ls --depth=0.

karlpokus

https://nodejs.org/api/fs.html#fs_class_fs_stats

var ts = fs.statSync(file).mtime.getTime()

props

• atime - last access time (open by you or script)
• mtime - last modification to the file
• ctime - last modified metadata (chmod etc)

karlpokus

// count by regex
COUNTIF(range, "F1*")

// countif more/less
COUNTIF(range, ">2015-01-01")

// countif NOT
COUNTIF(range, "<>Läkare")

// url - google sheets regex syntax

karlpokus

OUT OF DISK SPACE

It seems heroku caches lots of node modules in /home/ubuntu/.local/share/heroku/tmp. Just empty this dir and you'll be fine.

# in /home/ubuntu/.local/share/heroku
$ rm -rf tmp/*
# check
$ du -sh *

karlpokus

// https://stackoverflow.com/questions/27638402/strip-exif-data-from-image
// includes fiddle

function removeExif(res, cb) {
	const dv = new DataView(res);
	let offset = 0;
	let recess = 0;
	const pieces = [];
	let i = 0;

karlpokus

How to convert a SFC to something I can require?

• bundle.js does not work
• need to compile each part of the SFC individually

vue loader

• vue loader vue-loader is a loader for Webpack that can transform Vue components written in the following format into a plain JavaScript module vue-loader will parse the file, extract each language block, pipe them through other loaders if necessary, and finally assemble them back into a CommonJS module whose module.exports is a Vue.js component options object.
• vue loader configs

karlpokus

netcat

Duplex between to terminals

# start
$ nc -l 1234
# listen
$ nc 127.0.0.1 1234

Transfer files

karlpokus

• https://community.risingstack.com/the-definitive-guide-to-object-streams-in-node-js/

karlpokus

setup

• one-click install
• sensitive file: wp-config.php
• new db user, OS user, wp user
• add ssh keys && Disable Password Authentication
• do mysql_secure_installation
• wp REST api
• http://ip/wp-login.php
• dir: /var/www/html
• The "ufw" firewall is enabled. All ports except for 22, 80, and 443 are BLOCKED.

karlpokus

Scale

• replica sets scales reads
• sharding scales read and writes

replica sets

• backup
• primary and secondary members
• oplog requires a replica set

primary member