dhbradshaw

function MorseNode(ac, rate) {
    // ac is an audio context.
    this._oscillator = ac.createOscillator();
    this._gain = ac.createGain();

    this._gain.gain.value = 0;
    this._oscillator.frequency.value = 750;

    this._oscillator.connect(this._gain);

dhbradshaw

// Get html collection of images:
var imgs = document.getElementsByTagName('img')

// Convert to array
imgs = Array.from(imgs)

// Map to urls
var urls = imgs.map(img => img.src)

// Copy to clipboard

dhbradshaw

Check that your system supports systemd

pidof systemd
2733

If this return a number then your system supports systemd. Most Linux distributions in 2017 support systemd.

Check out the processes currently running.

Since systemd starts the process then all processes will be children of systemd

dhbradshaw

# Source: https://makandracards.com/makandra/527-squash-several-git-commits-into-a-single-commit

# Switch to the master branch and make sure you are up to date.
git checkout master
git fetch # this may be necessary (depending on your git config) to receive updates on origin/master
git pull

# Merge the feature branch into the master branch.
git merge feature_branch

dhbradshaw

# Encrypt file
gpg -c --cipher-algo AES256 private-file.txt

# Decrypt it
gpg private-file.txt.gpg

# !!Don't forget the passphrase!!

dhbradshaw

# Try listing the processes associated with a term, for example guake.
$ pgrep guake
8494

# Kill guake processes without bothering looking at them.
$ pkill guake

dhbradshaw

Postgres on WSL (Windows Subsystem for Linux) ubuntu 18.04

Hint: it's not different than running it under ubuntu without Windows.

Add postgres package registry

sudo apt install postgresql-common
sudo sh /usr/share/postgresql-common/pgdg/apt.postgresql.org.sh

Update apt

dhbradshaw

Rust setup

More often than one might expect, I find myself setting up a new environment for rust development.
Here are some things that I end up doing repeatedly.

Summary

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
cargo install cargo-watch

sudo apt install libpq-dev
cargo install diesel_cli --no-default-features --features postgres

dhbradshaw

Resolving my pagerduty problems with a simple js script

No user deletions for you!

Recently I had to delete a user from pagerduty, but the interface blocked me from doing so, saying that I couldn't complete the deletion until all of that users issues were resolved.

Slog ahead

I looked at the unresolved issues and there were thousands.

dhbradshaw

heroku config | sed 's/:  */=/g; /^=/d' >> .env