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Problem Statement

Develop an API endpoint to get a list of users.

Requirements to DB

DB should have at least 1MM records.

Requirements to API

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// Get list of prices of saled products that are below 1000, ordered by ASC

var sales = [
  {id: 1, price: "500"},
  {id: 2, price: "1500"},
  {id: 3, price: "750"},
  {id: 4, price: "1750"},
  {id: 5, price: "150"},
  {id: 3, price: "750"},
];

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1. Difference between px, em, rem

<style>
  html, body {
    font-size: 10px;
  }
  div {
    font-size: 15px;
 }

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Traditional SEO

• making it easy for crawlers do their job
• increae the content's quality
• unique and targeted content, including relevant keyword in content
• richness of content (videos, image) -- to increase time spending/descreas bounce rate
• fresh content, frequent updates
• link building
• keywords (used to work), overused strategy

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import {concat, filter, find, isEmpty, intersection, keys, map, not, reduce, uniq} from "ramda";

let theme = "paqmind";
let codemirrorModes = {
  "css": ["css"],
  "clojure": ["clj", "clojure"],
  "javascript": ["js", "javascript", "es"],
  "jinja2": ["jinja2"],
  "haskell": ["hs", "haskell"],
  "htmlmixed": ["html"],

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let R = require("ramda");

let data = [
  {id: "6", manufacturer: "Russia"},
  {id: "5", manufacturer: "USA"},
  {id: "3", manufacturer: "China"},
  {id: "2", manufacturer: "USA"},
  {id: "4", manufacturer: "Russia"},
  {id: "1", manufacturer: "RUSSIA"},
  {id: "1", manufacturer: "Xyz"},

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<div class="container">
  <div class="sprite">
    <p>
      Test
    </p>
  </div>
</div>

<style>
  .container {

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npm vs Yarn. Performance test on the real project

$ npm i

from package.json: 3m 17s
from shrinkwrap:   2m 56s

$ yarn

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// Sequence of promises
 
let promise = Q();
let result = [];
R.forEach(page => {
  promise = promise.then(r => {
    result = R.merge(r, result);
    return fetch(page);
  });
}, R.range(0, pages));

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var R = require("ramda");


function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1)) + min;
}

function generateNumberList(size) {
  return R.map(i => getRandomInt(0, size), R.range(0, size));
}