paulfranco

Interview Questions

MongoDB

Q1: Explain what is MongoDB? ☆

Answer: MongoDB is an open-source document database that provides high performance, high availability, and automatic scaling. It's Key Features are:

• Document Oriented and NoSQL database.

iamkevingreen

const sanityClient = require('@sanity/client');
const crypto = require('crypto');

const {
  SANITY_API_TOKEN,
  SANITY_PROJECT_ID,
  SANITY_DATASET,
  SHOPIFY_SECRET
} = process.env;

andywer

React - Functional error boundaries

Thanks to React hooks you have now happily turned all your classes into functional components.

Wait, all your components? Not quite. There is one thing that can still only be implemented using classes: Error boundaries.

There is just no functional equivalent for componentDidCatch and deriveStateFromError yet.

Proposed solution

bvaughn

This API was removed in React 17

---

Interaction tracing with React

React recently introduced an experimental profiler API. After discussing this API with several teams at Facebook, one common piece of feedback was that the performance information would be more useful if it could be associated with the events that caused the application to render (e.g. button click, XHR response). Tracing these events (or "interactions") would enable more powerful tooling to be built around the timing information, capable of answering questions like "What caused this really slow commit?" or "How long does it typically take for this interaction to update the DOM?".

With version 16.4.3, React added experimental support for this tracing by way of a new NPM package, scheduler. However the public API for this package is not yet finalized and will likely change with upcoming minor releases, so it should be used with caution.

matteocrippa

Flutter

A quick cheatsheet of useful snippet for Flutter

Widget

A widget is the basic type of controller in Flutter Material. There are two type of basic Widget we can extend our classes: StatefulWidget or StatelessWidget.

Stateful

StatefulWidget are all the widget that interally have a dynamic value that can change during usage. It can receive an input value in the constructor or reference to functions. You need to create two classes like:

gaearon

Note:

When this guide is more complete, the plan is to move it into Prepack documentation.
For now I put it out as a gist to gather initial feedback.

A Gentle Introduction to Prepack (Part 1)

If you're building JavaScript apps, you might already be familiar with some tools that compile JavaScript code to equivalent JavaScript code:

• Babel lets you use newer JavaScript language features, and outputs equivalent code that targets older JavaScript engines.

vcarl

I bundled these up into groups and wrote some thoughts about why I ask them!

If these helped you, I'd love to hear about it!! I'm on twitter @vcarl_ or send me an email carl.vitullo@gmail.com

Onboarding and the workplace

https://blog.vcarl.com/interview-questions-onboarding-workplace/

• How long will it take to deploy my first change? To become productive? To understand the codebase?
• What kind of equipment will I be provided? Will the company pay/reimburse me if I want something specific?

rhukster

#!/bin/bash
# Creator: Phil Cook
# Modified: Andy Miller
#
# >>> IMPORTANT: Moved to: https://github.com/rhukster/sphp.sh
# >>> Kept here for legacy purposes
#
osx_major_version=$(sw_vers -productVersion | cut -d. -f1)
osx_minor_version=$(sw_vers -productVersion | cut -d. -f2)
osx_patch_version=$(sw_vers -productVersion | cut -d. -f3)

lequanghuylc

It’s common these day when React & React Native developers use State management library (like Redux). I’ve been using React & React Native for a while now and found out that Pure React is actually not bad. In this article I will share my way of doing things with React & React Native purely, without State management library (represented by Redux). 

For those of you who are struggling learning Redux, because of the overwhelming of the whole React/JSX/Babel/Webpack/Native Component/Native Module/.. and have to add Redux to the list just to solve some of React problems, or because of the high learning curve of Redux, I hope you find this article helpful.

Some of React problems with State Management

Assuming you have some knowledge of React, I will jump right in the problems that most of us encoutered at the beginning of time learning React:

• Flow pass data down, pass event up makes us to pass data & function via props and it's hard to manage when amount of props gets huge. (Comunication between component

giannisp

After automatically updating Postgres to 10.0 via Homebrew, the pg_ctl start command didn't work.
The error was "The data directory was initialized by PostgreSQL version 9.6, which is not compatible with this version 10.0."

Database files have to be updated before starting the server, here are the steps that had to be followed:

# need to have both 9.6.x and latest 10.0 installed, and keep 10.0 as default
brew unlink postgresql
brew install postgresql@9.6
brew unlink postgresql@9.6
brew link postgresql