DEV Community: Dmitry Vdovichenko 💻🤘

My learning development progress💻💪🤯

Dmitry Vdovichenko 💻🤘 — Sun, 09 Aug 2020 08:55:26 +0000

Hi, my name is Dmitry and I'm fullstack NodeJS developer from Russia 🥶.

Here is some posts 👇 about my development learning progress📈.

At the end of the week, I'll write one post 📇 about my progress, and another - about my goals 💪 for next week.

So, this is the first post about my goals for next week.

Also, to each point, I'll attach 📎 some links to learning resources. Some of them written in russian 🇷🇺, because it's my native language.

Javascript 🤓 🎓

Working with theory: This&Objects

YDKJS: this & Object Prototypes

Object basics from learn.javascript.ru

Postgresql🤯

Isolation in Postgresql

MVCC - isolation from habr

Algorithms🧠

Binary search from Grokking Algorithms

JavaScript30 coding challenge.The Road travelled.

Dmitry Vdovichenko 💻🤘 — Sun, 02 Jun 2019 21:56:36 +0000

Now my frontpage with GitHub Pages for JavaScript30 coding challenge looks like this:vanillaJS-30days.

Halfway passed. 15 challenges finished.For me, the most useful challenges were:

Type Ahead - knowledges for fetch API and RegExp

Array Cardio - how to work with arrays in JS and use their methods.

Custom Video Player - how to work with video API from JS

Local Storage and Event Delegation - how to work with local storage in JS, in the case of storing some data from page.

Goodfellas from ES6. Let & Const.🤘

Dmitry Vdovichenko 💻🤘 — Sat, 06 Apr 2019 08:34:23 +0000

Here is the first post about ES6 features in lifestyle. This story is about let & const😎. This two guys did the old man - Var.🕵
Let's figure out, how they work in examples.

It's let, don't mess with him out from the block 😎, don't try to talk about him behind his back. If you want to make some variables only for your block, or even for each iteration of loop, let can help you.

{ /* Don't even try to talk about me behind my back, it works with var, 
not with me.💪 If you try, you've got reference error, boom!💥*/ 
  console.log(varFromTheBlock);
    // ReferenceError
  let varFromTheBlock = "I'm Var from the Block, don't mess with me out from the block";
  // Cause you got reference error, dude, you don't want it.
  console.log(varFromTheBlock);
// "I'm Var from the Block, don't mess with me out from the block"
 }
  console.log(varFromTheBlock); //ReferenceError: varFromTheBlock is not defined

// let in for loop
  var arrForIteration = [];
  for (let i = 0; i < 5; i++){
    arrForIteration.push( function(){
      console.log( i );
    } );
  }
  arrForIteration[3]();//3

It's const💪, he looks like let, but he is more principled and conservative. He is like a rock. If you want to create something, that never can be changed by somebody else, he can help you.

{
  const bigConst = ['cars','weapons'];
 // Hey I'm bigConst and I work for some huge array.🕵
 bigConst.push('cash');
 // Yes I can talk with array if you want and bring him some 'cash' 💵
 console.log( bigConst ); // ['cars','weapons','cash']
  //  But don't try to broke my powerful connections with guys, which I'm working for!
  bigConst = 'plant'; //TypeError
  // I told you! It's typeError, man.
}

JavaScript30 coding challenge

Dmitry Vdovichenko 💻🤘 — Sat, 09 Mar 2019 11:58:39 +0000

I've decided to begin #javaScript30 coding challenge! It's free course from WesBos #javaScript30 👍. For now, I've finished the first 5 challenges ✨ and create GitHub repository. Also, I've created small frontpage with GitHub Pages for this project https://dmitryvdovichencko.github.io/vanillaJS-30days/. Hopefully, this knowledge of vanillaJS will useful for me in the future 🙏.

03.06.2019 - Updated. Halfway passed. 15 challenges finished.For me, the most useful challenges were:

Type Ahead - knowledges for fetch API and RegExp

Array Cardio - how to work with arrays in JS and use their methods.

Custom Video Player - how to work with video API from JS

Local Storage and Event Delegation - how to work with local storage in JS, in the case of storing some data from page.

Understanding basic GraphQL Schema

Dmitry Vdovichenko 💻🤘 — Sat, 09 Feb 2019 10:21:19 +0000

It's my first post on DEV. Also, I'm not an expert in GraphQL, I'm just learning it, so...

Goal: understand how GraphQL Schema is working.

I've decided to rebuild my portfolio website with Gatsby. So I started to learn from Gatsby Tutorial how to work with Gatsby. In tutorial-part-four, reading about data in Gatsby, I move to [howtographql tutorial] cause I've had no experience with GraphQL before. If you check out basic core concept for GraphQL you can see an example of Schema Definition:

type Query {
  allPersons(last: Int): [Person!]!
}

type Mutation {
  createPerson(name: String!, age: Int!): Person!
}

type Subscription {
  newPerson: Person!
}

type Person {
  name: String!
  age: Int!
  posts: [Post!]!
}

type Post {
  title: String!
  author: Person!
}

Trying to understand, how it works I write short syllabus about core concepts from full article for myself in Russian.

And also I've created picture for visual perception. Hope, it'll help somebody.