icoxfog417

 // send to current request socket client
 socket.emit('message', "this is a test");

 // sending to all clients, include sender
 io.sockets.emit('message', "this is a test");

 // sending to all clients except sender
 socket.broadcast.emit('message', "this is a test");

 // sending to all clients in 'game' room(channel) except sender

tstellanova

Install pigpio

If you're working with the rpi3's gpio, the pigpio library can be very handy.

sudo apt-get update
sudo apt-get install pigpio 

If you also want to access pigpio from python, install: sudo apt-get install python-pigpio python3-pigpio

Setup pigpiod service to run at boot

dotspencer

Gitlab won't allow reuse of a public ssh key for multiple accounts. To get around this you need to create a second ssh key for the second account.

Create or modify your ~/.ssh/config file:

# normal                                                                                                                                                                  
Host gitlab.com-work_username
     HostName gitlab.com
     PreferredAuthentications publickey
 IdentityFile ~/.ssh/id_rsa

dbist

CockroachDB and Docker Compose

This is the first in a series of tutorials on CockroachDB and Docker Compose

• Information on CockroachDB can be found here.
• Information on Docker Compose can be found here

1. Install Docker Desktop

Because we already have an official CockroachDB docker image, we will use that in our docker-compose.yml file. We recommend you use one of the current tags instead of latest.

witmin

Convert MP4 file to animated WEBP file in ffmpeg CLI

1. Install ffmpeg CLI through homebrew

In terminal.app, install ffmpeg through homebrew

brew install ffmpeg

Validate the installation: