jcalz

You can use the tuple() function in tuple.ts to infer tuple types in TypeScript and cut down on the need to repeat yourself. Without tuple(), declaring a constant of a tuple type looks like this:

const daysOfTheWeek: ["sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday"] = 
  ["sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday"];

You can't do this:

const daysOfTheWeek = ["sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday"]; 

paceaux

Tiny rules for how to name stuff

CSS

How to name CSS classes

Stateful Class names

Is it a state that is only one of two conditions? (i.e. a boolean)

josephrace

image: node:7.9.0 # change to match your node version

cache:
  paths:
    - node_modules/

before_script:
  - npm install

test:

drkibitz

/**
 * This object represents a single listener of a Singal.
 * A listener is simply an object with a reference to a function and thisArg,
 * with a priority for insertion sorting and a once flag.
 * @class
 */
class Listener {
	/**
	 * @param {Function} fn - The listener function
	 * @param {Function} [thisArg] - The listener thisArg

xaviervia

Sketch 43 files JSON types

Based on the example file from the announcement blog post http://sketchplugins.com/d/87-new-file-format-in-sketch-43

type UUID = string // with UUID v4 format

type SketchPositionString = string // '{0.5, 0.67135115527602085}'

type SketchNestedPositionString = string // '{{0, 0}, {75.5, 15}}'

anaisbetts

//
// WRONG
///

class InMemorySparseMap<K, V> implements SparseMap<K, V> {
  private latest: Map<K, Updatable<V>>;
  private factory: ((key: K) => Observable<V>) | undefined;  

  subscribe(key: K): Updatable<V> {
    let ret = this.latest.get(key);

staltz

Not for everyone. Each programmer has their own appreciation of what is good coding music.

For when I need to think deep, debug something, or design

(From most influential to least)

• David Helpling & Jon Jenkins (sample)
• Patrick O'Hearn (sample)
• Ólafur Arnalds (sample)
• Michael Hedges (sample)
• Alex de Grassi (sample)

developit

/** Async version of Array.prototype.reduce()
 *  await reduce(['/foo', '/bar', '/baz'], async (acc, v) => {
 *    acc[v] = await (await fetch(v)).json();
 *    return acc;
 *  }, {});
 */
export async function reduce(arr, fn, val, pure) {
  for (let i=0; i<arr.length; i++) {
    let v = await fn(val, arr[i], i, arr);
    if (pure!==false) val = v;

gaearon

Thanks everyone for participating in the quiz!
Many of you have posted correct answers.

What we know:

A top-level App component returns <Button /> from its render() method.

Question:

>What is the relationship between `` and this in that `Button`’s `render()`?

jdegoes

Applied Functional Programming with Scala - Notes

Copyright © 2016-2018 Fantasyland Institute of Learning. All rights reserved.

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x