rlisowski

1. Open Automator.app
2. Create new Quick Action
3. Select Run AppleScript
4. Add this:

set inputVolume to input volume of (get volume settings)
if inputVolume = 0 then
	set inputVolume to 100
	display notification "Volume set to 100" with title "✅ Microphone is on"

rlisowski

[language.rust]
command = "rls"
install = [
  ["rustup", "update"],
  ["rustup", "component", "add", "rls", "rust-analysis", "rust-src"],
]

[language.javascript]
command = "flow"
args = ["lsp"]

rlisowski

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

rlisowski

gem 'stackprof', require: false
gem 'ruby-prof', require: false

rlisowski

I18n.pluralization["pl"] = function (count) {
  var n = count || 0
  var mod10 = count % 10
  var mod100 = count % 100

  key = "zero"

  if ( n == 0 ) {
    key = "zero";
  } else if ( n == 1 ) {

rlisowski

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

---

General rules

1. Follow standard conventions.
2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

Design rules

rlisowski

def geo_distance(loc1, loc2)
  rad_per_deg = Math::PI/180  # PI / 180
  rkm = 6371                  # Earth radius in kilometers
  rm = rkm * 1000             # Radius in meters

  dlat_rad = (loc2[0]-loc1[0]) * rad_per_deg  # Delta, converted to rad
  dlon_rad = (loc2[1]-loc1[1]) * rad_per_deg

  lat1_rad, lon1_rad = loc1.map {|i| i * rad_per_deg }
  lat2_rad, lon2_rad = loc2.map {|i| i * rad_per_deg }

rlisowski

# This goes in config/locales/en.rb (*not* en.yml)
{
  :en => {
    :date => {
      :formats => {
        :short => lambda { |date, _| "%b #{date.day.ordinalize}" },
        :long => lambda { |date, _| "%B #{date.day.ordinalize}, %Y" }
      }
    },
    :time => {

rlisowski

Location.
  where('ST_Covers(?, coordinates)', Shapefile.where(area_name: 'BR2').first.geometry.to_s).
  size

# produces two SQL queries, the filter query look like
# SELECT Count(*) 
# FROM   "location" 
# WHERE  ( 
#   St_covers( 
#     'MULTIPOLYGON (((0.004218521268697022 51.38840811418139, ... , 0.004218521268697022 51.38840811418139)))'

rlisowski

class ElasticsearchLocationsImporter
  def call
    ElasticsearchImporter.new(
      index_alias: 'locations',
      mapping: mapping,
      payload: locations_body
    ).call
  end

  private