ShopifyEng

class Types::CustomerType < Types::BaseObject
  implements GraphQL::Relay::Node.interface

  def self.object_from_id(id, context)
    CustomerRepository.find(context[:seller], id: id) # or: context[:seller].customers.find_by(id: id)
  end

  field :name, String, null: true
  field :name, Email, null: true
  # ...

ShopifyEng

# When run on the following 20 repositories, it found 2082 ||= and it was used as lazy init 64.3% of the time
# Those numbers are fuzzy, as there is not certain way to prove if something was used as a lazy init
# This script only marks a usage as a lazy init if the variable is being set to a constant,
# in which case if it is not a lazy init then the developers have done something weird.
# It is also marked as a lazy init if the variable is an instance variable or a class variable (either @var or @@var)
# AND the lazy init is used in the top level of a function, AND the function name is contained by the variable or vice versa.
# These are almost certain to be lazy initialized because the assumed behaviour is to always call the method instead of the variable,
# and other usages would be both weird usage of instance/class variables and/or weird usage of the method naming
# This of course, misses a variety of cases but likely does not get any cases that do not lazy initialize.
# A better way to profile could be 

ShopifyEng

import React, {useMemo} from 'react'
import Animated from 'react-native-reanimated'
import {View, Dimensions, StyleSheet} from 'react-native'
import FastImage from 'react-native-fast-image'
import ConfettiImage from 'assets/images/confetti.png'

const NUM_CONFETTI = 100
const COLORS = ['#00e4b2', '#09aec5', '#107ed5']
const CONFETTI_SIZE = 16

ShopifyEng

{
  "payload": { 
    "op": "c", 
    "ts_ms": 1465491411815, 
    "before": null, 
    "after": { 
      "id": 1,
      "first_name": "Peyton",
      "last_name": "Manning",
      "address1": "18 Willow St",

ShopifyEng

# Gem
module PricingEngine
  class Engine
    #... 
    # Calculates the price for variants given the buyer context.
    #
    # @param context [Schema::BuyerContext] the buyer context
    #
    # @return [Array<PricingEngine::Schema::Price>] An array of prices for the context passed.
    def calculate_prices_for_variants(context)

ShopifyEng

module PricingEngine
  class PricingRepositoryInterface
    def variants_by_ids(ids)
      raise NotImplemented
    end

    def variants_by_titles(titles)
      raise NotImplemented
    end
  end

ShopifyEng

# Consumer 1 Logic

require 'pricing_engine'

module ShopifyCore
  class PricingRepository < PricingEngine::PricingRepositoryInterface
    def variants_by_ids(ids)
      variants = ProductVariant.where(id: ids).select(:title, :price).limit(50)
      variants.map { |variant| PricingEngine::Schema::Variant.new(title: variant.title, price: variant.price) }
    end

ShopifyEng

# Consumer 2 Logic

require 'pricing_engine'

module StorefrontRenderer
  class PricingRepository < PricingEngine::PricingRepositoryInterface
    def variants_by_ids(ids)
      variants = DataStoreConnection.execute("SELECT title, price FROM variants WHERE id in (?)", ids).limit(50)
      variants.map { |variant| PricingEngine::Schema::Variant.new(title: variant.title, price: variant.price) }

ShopifyEng

module PricingEngine
  class Engine
    # @param repository [PricingEngine::PricingRepositoryInterface] environment specific functions to
    # access db and cache data.
    #
    # @return [void]
    def initialize(repository)
      @repository = repository
    end

ShopifyEng

# ----------------------------- Gem -----------------------------
module PricingEngine
  class PricingRepositoryInterface
    def variants_by_ids(ids)
      raise NotImplemented
    end

    def variants_by_titles(titles)
      raise NotImplemented
    end