AlphaWong

# Nerd Fonts for your IDE
# https://www.nerdfonts.com/font-downloads

brew tap homebrew/cask-fonts && brew install --cask font-3270-nerd-font
brew tap homebrew/cask-fonts && brew install --cask font-fira-mono-nerd-font
brew tap homebrew/cask-fonts && brew install --cask font-inconsolata-go-nerd-font
brew tap homebrew/cask-fonts && brew install --cask font-inconsolata-lgc-nerd-font
brew tap homebrew/cask-fonts && brew install --cask font-inconsolata-nerd-font
brew tap homebrew/cask-fonts && brew install --cask font-monofur-nerd-font
brew tap homebrew/cask-fonts && brew install --cask font-overpass-nerd-font

AlphaWong

1) Install cloudflared using homebrew:

brew install cloudflare/cloudflare/cloudflared

2) Create /usr/local/etc/cloudflared/config.yaml, with the following content

proxy-dns: true
proxy-dns-upstream:
  - https://1.1.1.1/dns-query
  - https://1.0.0.1/dns-query

AlphaWong

[unix_http_server]
file=/tmp/supervisor.sock                       ; path to your socket file

[supervisord]
logfile=/var/log/supervisord/supervisord.log    ; supervisord log file
logfile_maxbytes=50MB                           ; maximum size of logfile before rotation
logfile_backups=10                              ; number of backed up logfiles
loglevel=error                                  ; info, debug, warn, trace
pidfile=/var/run/supervisord.pid                ; pidfile location
nodaemon=false                                  ; run supervisord as a daemon

AlphaWong

sudo apt install ruby ruby-dev
sudo gem install travis
# install path: /var/lib/gems/

AlphaWong

sudo apt install ruby ruby-dev
sudo gem install travis
# install path: /var/lib/gems/

AlphaWong

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

AlphaWong

How to install redis-cli and psql client on your machine with Docker

Preparing docker images

We will use minimalistic Linux distribution called Alpine (5MB)

Dockerfile of redis-cli

FROM alpine:latest
RUN apk --update add redis

AlphaWong

How to install redis-cli and psql client on your machine with Docker

Preparing docker images

We will use minimalistic Linux distribution called Alpine (5MB)

Dockerfile of redis-cli

FROM alpine:latest
RUN apk --update add redis

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// haversin(θ) function
func hsin(theta float64) float64 {
	return math.Pow(math.Sin(theta/2), 2)
}

// Distance function returns the distance (in meters) between two points of
//     a given longitude and latitude relatively accurately (using a spherical
//     approximation of the Earth) through the Haversin Distance Formula for
//     great arc distance on a sphere with accuracy for small distances
//

AlphaWong

Go, multiple packages and coveralls.io

Single profile for single Go package

For Go projects that consist of only one package, the following Travis configuration is enough to get started with coveralls.io. You may want to encrypt your $COVERALLS_TOKEN via Travis encryption keys though.

language: go
go:
 - 1.3.1