rauschma

Cheat sheet: JavaScript Array methods

Deriving a new Array from an existing Array:

['■','●','▲'].slice(1, 3)          ⟼ ['●','▲']
['■','●','■'].filter(x => x==='■') ⟼ ['■','■']
    ['▲','●'].map(x => x+x)        ⟼ ['▲▲','●●']
    ['▲','●'].flatMap(x => [x,x])  ⟼ ['▲','▲','●','●']

onlurking

Programming as Theory Building

Peter Naur

Peter Naur's classic 1985 essay "Programming as Theory Building" argues that a program is not its source code. A program is a shared mental construct (he uses the word theory) that lives in the minds of the people who work on it. If you lose the people, you lose the program. The code is merely a written representation of the program, and it's lossy, so you can't reconstruct

JoeyBurzynski

58 bytes of CSS to look great nearly everywhere

When making this website, i wanted a simple, reasonable way to make it look good on most displays. Not counting any minimization techniques, the following 58 bytes worked well for me:

main {
  max-width: 38rem;
  padding: 2rem;
  margin: auto;
}

threepointone

https://twitter.com/snookca/status/1073299331262889984?s=21

‪“‬In what way is JS any more maintainable than CSS? How does writing CSS in JS make it any more maintainable?”

‪Happy to chat about this. There’s an obvious disclaimer that there’s a cost to css-in-js solutions, but that cost is paid specifically for the benefits it brings; as such it’s useful for some usecases, and not meant as a replacement for all workflows. ‬

‪(These conversations always get heated on twitter, so please believe that I’m here to converse, not to convince. In return, I promise to listen to you too and change my opinions; I’ve had mad respect for you for years and would consider your feedback a gift. Also, some of the stuff I’m writing might seem obvious to you; I’m not trying to tell you if all people of some of the details, but it might be useful to someone else who bumps into this who doesn’t have context)‬

So the big deal about css-in-js (cij) is selectors.

trevorgreenleaf

ebidel

Moved to https://github.com/ebidel/puppeteer-examples

enricofoltran

package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"

Ryonez

(Unofficial) Discord server rules suggestions list

Author's Note

I'll start off with letting you know this is a fork from someone else. However, for some bizarre reason, this is the one everyone finds, so I better get round to updating this. Credit to Cristiano#2233 for the original idea.

Also, I've had a lot of people saying the rules are to strict. If you pick all the rules here, you're right, it would be very strict. However the rules below are guidelines! They are there for you to pick the ones you desire, you can ignore ones you don't want. Hopefully they might help with rules you wouldn't have thought of otherwise.

xavadu

    // Dark Nova theme
    "workbench.colorCustomizations": {
        "editor.background": "#2D2D2D",
        "sideBar.background": "#252526",
        "activityBar.background": "#333333",
        "editor.lineHighlightBackground": "#444440",
        "input.background": "#3C3C3C",
        "list.focusBackground": "#444440",
        "tab.activeBackground": "#2D2D2D",
        "tab.border": "#2D2D2D",

sorenlouv

import React, { Component } from 'react';

export default function withPropsChecker(WrappedComponent) {
  return class PropsChecker extends Component {
    componentWillReceiveProps(nextProps) {
      Object.keys(nextProps)
        .filter(key => {
          return nextProps[key] !== this.props[key];
        })
        .map(key => {