rakibulislam

Table of Contents

• Profiling in production
  • Create React App
  • Webpack 4
• Trouble Shooting
  • Tracking broke after an NPM update

Profiling in production

React DOM automatically supports profiling in development mode for v16.5+, but since profiling adds some small additional overhead it is opt-in for production mode. This gist explains how to opt-in.

rakibulislam

Originally published in June 2008

When hiring Ruby on Rails programmers, knowing the right questions to ask during an interview was a real challenge for me at first. In 30 minutes or less, it's difficult to get a solid read on a candidate's skill set without looking at code they've previously written. And in the corporate/enterprise world, I often don't have access to their previous work.

To ensure we hired competent ruby developers at my last job, I created a list of 15 ruby questions -- a ruby measuring stick if you will -- to select the cream of the crop that walked through our doors.

What to expect

Candidates will typically give you a range of responses based on their experience and personality. So it's up to you to decide the correctness of their answer.

rakibulislam

Ruby on Rails Cheatsheet (5.1)

Architecture

RVM

$ rvm list - show currently installed Rubies

rakibulislam

import React from 'react'
import ReactDOM from 'react-dom'
import PropTypes from 'prop-types'
import {AppProvider, Page, Card, Button} from '@shopify/polaris';

const Users = props => (
	<AppProvider>
	   <Page title="Users">
	    {props.users.map((user, index) => (
	    <Card key={index}

rakibulislam

$ echo 'gem "webpacker"' >> Gemfile
$ bundle install
$ rails webpacker:install
$ yarn add bootstrap@4.0.0-beta jquery popper.js

diff --git a/config/webpack/environment.js b/config/webpack/environment.js
index d16d9af..86bf1a7 100644

rakibulislam

require "net/http"

def start_server
  # Remove the X to enable the parameters for tuning.
  # These are the default values as of Ruby 2.2.0.
  @child = spawn(<<-EOC.split.join(" "))
    XRUBY_GC_HEAP_FREE_SLOTS=4096
    XRUBY_GC_HEAP_INIT_SLOTS=10000
    XRUBY_GC_HEAP_GROWTH_FACTOR=1.8
    XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0

rakibulislam

Tutorial: Designing a GraphQL API

This tutorial was created by Shopify for internal purposes. We've created a public version of it since we think it's useful to anyone creating a GraphQL API.

It's based on lessons learned from creating and evolving production schemas at Shopify over almost 3 years. The tutorial has evolved and will continue to change in the future so nothing is set in stone.

rakibulislam

CURRENT_DATE=`date -Ru | sed 's/+0000/GMT/'`
CHECKSUM=$(echo -n "application/json,,/transactions/<ID>,$CURRENT_DATE" \
 | openssl dgst -sha1 -binary -hmac "your-secret-key" \
 | base64)

curl "https://apix.casiregalii.com/transactions/<ID>" \
  -X GET \
  -H "Accept: application/vnd.regalii.v3.2+json" \
  -H "Content-Type: application/json" \
  -H "Content-MD5:" \

rakibulislam

CURRENT_DATE=`date -Ru | sed 's/+0000/GMT/'`
CHECKSUM=$(echo -n "application/json,,$CURRENT_DATE" \
 | openssl dgst -sha1 -binary -hmac "your-secret-key" \
 | base64)

curl "https://apix.casiregalii.com/rpps_billers" \
  -X GET \
  -H "Accept: application/vnd.regalii.v3.2+json" \
  -H "Content-Type: application/json" \
  -H "Content-MD5:" \

rakibulislam

CURRENT_DATE=`date -Ru | sed 's/+0000/GMT/'`
CHECKSUM=$(echo -n "application/json,,/bills/<ID>/pay,$CURRENT_DATE" \
 | openssl dgst -sha1 -binary -hmac "your-secret-key" \
 | base64)

curl "https://apix.casiregalii.com/bills/<ID>/pay" \
  -X POST \
  -d '{"amount":5568.00, "currency":"USD"}' \
  -H "Accept: application/vnd.regalii.v3.2+json" \
  -H "Content-Type: application/json" \