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Google Chrome Recorder Tutorial – run Puppeteer tests from CLI

Refer: https://www.youtube.com/watch?v=DrUZmvS10Os

Use DistroBox to Install Locally

Refer: https://postsrc.com/code-snippets/how-to-install-latest-stable-chrome-version-in-ubuntu-puppeteer

Step 1: Download Setup with cURL

curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash -

Step 2: Install Required Ubuntu Dependency

sudo apt-get install -y nodejs gconf-service libasound2 libatk1.0-0 libc6 libcairo2 libcups2 libdbus-1-3 libexpat1 libfontconfig1 libgbm1 libgcc1 libgconf-2-4 libgdk-pixbuf2.0-0 libglib2.0-0 libgtk-3-0 libnspr4 libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 ca-certificates fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils wget libgbm-dev libxshmfence-dev

Step 3: Install Puppeteer

sudo npm install --global --unsafe-perm puppeteer

Step 4: Run the file

node file-to-run.js

Older Instructions

sudo apt-get install -y nodejs
sudo apt-get install -y npm
npm i puppeteer

sudo apt-get install -y nodejs
sudo apt-get install -y npm
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Compare Two Text Files

Refer: https://stackoverflow.com/questions/746458/how-to-show-lines-in-common-reverse-diff" href="https://stackoverflow.com/questions/746458/how-to-show-lines-in-common-reverse-diff">https://stackoverflow.com/questions/746458/how-to-show-lines-in-common-reverse-diff

comm -1 -2 file1.sorted file2.sorted

where file1 and file2 are sorted and piped into *.sorted

Here's the full usage of comm:

comm [-1] [-2] [-3 ] file1 file2
-1 Suppress the output column of lines unique to file1
-2 Suppress the output column of lines unique to file2
-3 Suppress the output column of lines duplicated in file1 and file2

The comm command (short for "common") may be useful comm - compare two sorted files line by line

find lines only in file1

comm -23 file1 file2

find lines only in file2

comm -13 file1 file2

find lines common to both files

comm -12 file1 file2

The man file is actually quite readable for this.

comm -23 OLCI_K229.csv OLCI_EDOCS.csv
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Split MP3 Audio and Convert M4B to MP3

Refer: https://askubuntu.com/questions/1264779/how-to-split-an-mp3-file-by-detecting-silent-parts

Use ffmpeg to convert m4b to mp3

Refer: Refer: https://superuser.com/questions/173571/how-to-convert-m4b-files-to-mp3

ffmpeg -i "file.m4b" -acodec libmp3lame -ar 22050 "file.mp3"

Install Software

sudo apt install -y mp3splt

Sample Usage:

mp3splt -s your.mp3

If it creates TOO MANY TRACKS

Mp3splt will try to automatically detect splitpoints with silence detection and will split all tracks found with default parameters.

mp3splt -s -p th=-50,nt=100 your.mp3

passing desired parameters, splitting 100 tracks (or less if too much) with the most probable silence points at a threshold of -50 dB.

In this example we are setting the minimum silence to 4.9 seconds and still

mp3splt -s -p th=-40,min=4.9,nt=100 'The Catcher in the Rye By Salinger.mp3'
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Arduino Button Box

Cherry Switch dimension is 14.3 mm x 14.3 mm when using a CAD program to cut-out holes for it.

Using Rotary Encoder Library

Adding the OLED display seemed to change the impedence slightly for the button array and the code was excuting ALL of the button code and really slow down things. After a tweak of the code to ignore, things started working again.