sasha gudulin agudulin

upgrading chromedriver on macos catalina v10.15.4

brew cask reinstall chromedriver
xattr -d com.apple.quarantine /usr/local/Caskroom/chromedriver/$VERSION/chromedriver

Install ImageMagick

brew install ImageMagick

Pull specific region of frames from video file w/ ffmpeg

ffmpeg -ss 14:55 -i video.mkv -t 5 -s 480x270 -f image2 %04d.png

-ss 14:55 gives the timestamp where I want FFmpeg to start, as a duration string.
-t 5 says how much I want FFmpeg to decode, using the same duration syntax as for -ss.
-s 480x270 tells FFmpeg to resize the video output to 480 by 270 pixels.
-f image2 selects the output format, a series of still images — make sure there are leading zeros in filename.

Releasing a new minor version

Say, the current version is 1.3.2 and you want to release 1.4.0 with some prereleases in between

$ npm version

1.3.2

And you want to make a prerelease before releasing a minor change

Github : Signing commits using GPG (Ubuntu/Mac) 🔐

You have an account on Github already ? If not create one.
Install required tools
Latest Git Client
gpg tools

# Ubuntu
sudo apt-get install gpa seahorse
# Mac

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

var Article = require('../../../models/article');

Those suck for maintenance and they're ugly.

	#!/bin/bash
	# This has to be run from master
	git checkout master

	# Update our list of remotes
	git fetch
	git remote prune origin

	# Remove local fully merged branches
	git branch --merged master \| grep -v 'master$' \| xargs git branch -d

	function willThereEverBeARainbow(string) {
	const rainbow = ['Red', 'Orange', 'Yellow', 'Green', 'Blue', 'Indigo', 'Violet'].join('').toUpperCase();
	const characterFrequencyMap = (str) => str.split('').reduce((acc, letter) => {
	return Object.assign({}, acc, {
	[letter]: acc[letter] ? acc[letter] + 1 : 1
	});
	}, {});
	const expectedLettersMap = characterFrequencyMap(rainbow); // => { R: 3, E: 7, D:2, ... }
	const inputLettersMap = characterFrequencyMap(string);

	root = true

	[*]
	indent_style = space
	indent_size = 2
	end_of_line = lf
	charset = utf-8
	trim_trailing_whitespace = true
	insert_final_newline = true

	=Navigating=
	visit('/projects')
	visit(post_comments_path(post))

	=Clicking links and buttons=
	click_link('id-of-link')
	click_link('Link Text')
	click_button('Save')
	click('Link Text') # Click either a link or a button
	click('Button Value')

	PATH := $(PATH):./node_modules/.bin/
	JS = ./app/assets/javascripts
	APP = $(JS)/legacy
	SOURCE = $(wildcard $(APP)/common.js.coffee $(APP)/controllers/*/.js.coffee)
	TARGET = $(patsubst %.js.coffee,%.js,$(SOURCE))

	LIBS = $(shell find $(APP)/{controllers,modules,utils} -name '*.js.coffee' -print)
	VENDOR = $(shell find ./vendor/assets/javascripts -name '*.js' -print)
	PKG = $(wildcard package.json)
	FLAGS = -t browserify-shim -t coffeeify --extension='.js.coffee'