joemasilotti

import Foundation

enum Environment: String {
    case development, staging, production
}

extension Environment {
    static var current: Environment {
        if isAppStore {
            return .production

kconner

macOS Internals

Understand your Mac and iPhone more deeply by tracing the evolution of Mac OS X from prelease to Swift. John Siracusa delivers the details.

Starting Points

How to use this gist

You've got two main options:

dcyoung-dev

  def active_link_to(name = nil, options = nil, **html_options, &block)
    options = block_given? ? name : options

    if current_page?(options)
      html_options[:class] = class_names(html_options[:class], :active)
      html_options[:aria] = html_options.fetch(:aria, {}).merge(current: :page)
    end

    if block_given?
      link_to options, html_options, &block

henrik

def stub_env(key, value)
  is_set_up_flag = "__stub_env_is_set_up"

  unless ENV[is_set_up_flag]
    allow(ENV).to receive(:[]).and_call_original
    allow(ENV).to receive(:fetch).and_call_original

    allow(ENV).to receive(:[]).with(is_set_up_flag).and_return(true)
  end

postmodern

#!/usr/bin/env ruby

require 'benchmark'

Benchmark.bm do |b|
  n = 1_000_000

  value1 = 1
  value2 = nil

searls

#!/usr/bin/env bash

# Useful when you want to git bisect in a rails app and know
# you need to `bin/rake db:migrate VERSION="SOMETHING"` before
# you check out the next commit so the database is in the right
# state, but you don't know what SOMETHING is.

# Usage:
#
# $ migration_version_at_ref <REF>

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)

mudge

class ApiController < ApplicationController
  before_action :only_respect_accept_header

  private

  # By default, Rails will ignore the Accept header if it contains a wildcard
  # and assume the client wants HTML (or JS if using XMLHttpRequest). See
  # https://github.com/rails/rails/blob/a807a4f4f95798616a2a85856f77fdfc48da4832/actionpack/lib/action_dispatch/http/mime_negotiation.rb#L171-L173
  #
  # If you don't expect your clients to be browsers, we want to override this

kaspth

# All these requires are just for running via `irb`, if using `bin/rails console` you probably just need the method.
require "active_support/all" # Got an inflector NoMethodError, so I'm just being lazy here.

require "action_dispatch"
require "action_dispatch/routing/route_set"
require "action_dispatch/routing/inspector"

require "action_controller" # For the ActionController::Parameters autoload, which any route helper uses.

# Console helper play around with the routing DSL and tweak an individual route you're building.

JoshCheek

require 'objspace'

def self.show_allocations(&block)
  _ = ObjectSpace.trace_object_allocations &block
  ObjectSpace
    .each_object
    .to_a
    .filter_map do |obj|
      file = ObjectSpace.allocation_sourcefile obj
      line = ObjectSpace.allocation_sourceline obj