baweaver

class Cond
  IDENTITY = -> v { v }

  def initialize(if_cond: IDENTITY, then_branch: IDENTITY, else_branch: IDENTITY)
    @if_cond = if_cond
    @then_branch = then_branch
    @else_branch = else_branch
  end

  def call(v)

prologic

Learn Go in ~5mins

This is inspired by A half-hour to learn Rust and Zig in 30 minutes.

Basics

Your first Go program as a classical "Hello World" is pretty simple:

First we create a workspace for our project:

unrooted

Manage services in systemd, openRC and runit

systemd

• list all services: systemctl list-unit-files
• list running services status: systemctl list-units
• list failed services: systemctl --failed
• list available services: systemctl --all
• start a service: systemctl start [SERVICE_NAME]
• stop a service: systemctl stop [SERVICE_NAME]

rzane

QueryExtensions

First, you'll need to incorporate the extension:

class ApplicationRecord < ActiveRecord::Base
  extend QueryExtensions
end

ProGM

Arel Cheatsheet on Steroids

A (more) complete cheatsheet for Arel, including NamedFunction functions, raw SQL and window functions.

Tables

posts = Arel::Table.new(:posts)
posts = Post.arel_table # ActiveRecord

Table alias

kvnxiao

Awesome Go

financial support to Awesome Go

A curated list of awesome Go frameworks, libraries and software. Inspired by awesome-python.

Contributing

loilo

Vue: Pass Slots through from Parent to Child Components

The Situation

• We've got some components A, B and C which provide different slots.

  const A = {
    template: `<div><slot name="a">Default A Content</slot></div>`
  }

const B = {

kddnewton

Faster Rails tests

Feedback loop speed in one of the biggest contributing factors to overall development time. The faster you get results, the faster you can move on to other things. A fast enough test suite is therefore critical to teams' success, and is worth investing some time at the beginning to save in the long run.

Below is a list of techniques for speeding up a Rails test suite. It is not comprehensive, but should definitely provide some quick wins. This list of techniques assumes you're using minitest, but most everything should translate over to rspec by simply replacing test/test_helper.rb with spec/spec_helper.rb.

• Lead with data
• bcrypt
• bootsnap
• Cache Time::utc calls

Tomasvrba

How to capture, stitch and publish a 360° timelapse

Consumer ready 360° cameras are becoming ever more accessible and many people are experimenting with a variety of 360° content. Out of the many cameras on the market the Ricoh Theta S is one of the most user-friendly, turn-key solutions with lots of built-in features. However, the camera's videos are limited 1920x960 resolution and the Theta+ app only lets you create a timelapse with up to 300 or 400 images. The workaround is to use interval shooting to capture as many images as you'd like at the 5376x2688 to full resolution and then stitch them together manually into an HD video. There are few GUI solutions (especially open-source/free) which let you do this with ease. Here's how you do it:

Set up interval shooting on your Ricoh Theta S

BusterNeece

#! /bin/bash

VBR="1500k"
FPS="30"
QUAL="veryfast"

YOUTUBE_URL="rtmp://a.rtmp.youtube.com/live2"
KEY=""

VIDEO_SOURCE="/home/ubuntu/video3.mp4"