Issue #20 - Internals of v8 engine, generating code snippets from terminal and more

Learn how to write better tests with implicit assertions, solve common UI problems easily with modern CSS, create high-quality images of code snippets and terminal output straight from your terminal, and test your understanding of generators in JavaScript.

Tip of the day

We can use the Intl.PluralRules API to format numbers with their st, nd, rd and th ordinals.

const pr = new Intl.PluralRules('en-US', {
  type: 'ordinal',
});

const numberformatter = new Intl.NumberFormat('en-US');

const suffixes = new Map([
  ['one', 'st'],
  ['two', 'nd'],
  ['few', 'rd'],
  ['other', 'th'],
]);

function formatNumber(n: number) {
  const rule = pr.select(n); // 'one', 'two', 'few', 'other'
  const suffix = suffixes.get(rule);
  return `${numberformatter.format(n)}${suffix}`;
}

formatNumber(1); // 1st
formatNumber(2); // 2nd
formatNumber(123453); // 123,453rd
formatNumber(5555); // 5,555th

Articles

Implicit Assertions

Have a better understanding about the explicit and implicit assertions now, and perhaps even have a test or two in mind to improve.

by Artem Zakharchenko

Smart CSS Solutions For Common UI Challenges

Writing CSS has probably never been more fun and exciting than it is today. In this post we look at common problems, use cases and how to solve them with modern CSS.

by Cosima Mielke

Tools

Freeze

Freeze let’s you generate high quality PNGs, SVGs and WEBPs of code and terminal output directly from your terminal.

by Charm

Common

Easily click to copy unicodes that are commonly used when designing interfaces.

by Benjamin Hoppe

Tech Talks

Understanding the V8 JavaScript Engine

Learn with visualizations how JavaScript code written for humans gets compiled and optimized to code that machines understand

by Lydia Hallie

Quiz

What is wrong with the following snippet?

function* getSquares(limit) {
  for (i = 1; i <= limit; i++) {
    yield i * i;
  }
}

for (const number in getSquares(3)) {
  console.log(number);
}

This week in GIF

When a colleague forwards me a bunch of tickets while I’m in the middle of coding

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