NikitaAvvakumov

items = [%{id: 1, deleted: false}, %{id: 2, deleted: true}, %{id: 3, deleted: false}]

for item <- items do
  IO.puts Map.fetch!(item, :id)
end
# 1
# 2
# 3
# [:ok, :ok, :ok]

NikitaAvvakumov

// provided `onEdit` trigger cannot use `UrlFetchApp.fetch`.
// create a custom-named function, then add it as a new trigger in "Edit" > "Current Project Triggers"
// with events "From spreadsheet" > "On edit"
function customOnEdit(e) {
  const range = e.range;
  const row = range.getRow();
  const sheet = e.source.getActiveSheet();
  
  const data = {
    vendor: sheet.getRange(row, 1).getValue(),

NikitaAvvakumov

# macOS
for f in `ag -l <target> [path]`; do sed -i '' -e 's/<target>/<replacement>/' $f; done

# Linux
for f in `ag -l <target> [path]`; do sed -i'' -e 's/<target>/<replacement>/' $f; done

NikitaAvvakumov

from h in Webhook, where: fragment("?->>? = ?", h.body, "title", ^"some title") # note `=` NOT `==`
from h in Webhook, where: fragment("?->>? = ?::text", h.body, "title", ^"some title") # can specify type if needed
from h in Webhook, where: fragment("?->>'title' ILIKE ?", h.body, ^"some title")

NikitaAvvakumov

# Ruby's `=` can be a part of a method name, but is not a method on its own. Consider:
class MyClass
  def initialize(value)
    @a = value
  end
  
  def a=(new_value) # `=` is part of a method name
    @a = new_value  # `=` is an operator
  end
  

NikitaAvvakumov

# from http://youtu.be/fGFM_UrSp70

def slow(&block)
  block.call
end

def fast
  yield         # 5x faster than passing a block as an argument
end

NikitaAvvakumov

#TODO Remove this brittle spec after it proves that the migration works

require 'rails_helper'

migration_file_name = '20150307173710_add_father_deceased_to_orphans.rb'

migration_file_path = Rails.root.join 'db', 'migrate', migration_file_name
version = migration_file_name.split('_').first

require migration_file_path

NikitaAvvakumov

#TODO Remove this brittle spec after it proves that the migration works

require 'rails_helper'

migration_file_name = '20150226095809_add_status_enums_to_orphan.rb'

migration_file_path = Rails.root.join 'db', 'migrate', migration_file_name
version = migration_file_name.split('_').first

require migration_file_path

NikitaAvvakumov

  # no indentation
  def send_mail(source)
    Mailer.deliver(to: 'bob@example.com', from: 'us@example.com', subject: 'Important message', body: source.text)
  end

  # single indent
  def send_mail(source)
    Mailer.deliver(
      to: 'bob@example.com',
      from: 'us@example.com',

NikitaAvvakumov

# Solution 1
class Partner < ActiveRecord::Base
  
  belongs_to :province
  has_many :orphan_lists
  
  delegate :code, to: :province, prefix: true
end

class Orphan < ActiveRecord::Base