toxi-kb

const arr = [ ['key', 'value'], ['x', 500] ];
const obj = Object.fromEntries(arr);

toxi-kb

toggleComplete = itemId => {  
    this.setState(state => {
        const todos = state.todos.map(todo => {
            return todo.id === itemId
                ? { ...todo, completed: !todo.completed }
                : todo;
        });
    
        return { todos };
    });

toxi-kb

import React, { useState, useCallback } from "react";

const SearchWithHooks = () => {
  const [search, setSearch] = useState("");
  const onSearchInputChange = useCallback(e => {
    setSearch(e.target.value);
  }, []);

  return (
    <input

toxi-kb

function getCarConfig(car) {
  const hasGoodRating = car.rating > 4;
  const description = hasGoodRating ? "good car" : "bad car";
  const newPrice = hasGoodRating ? car.price + 1000 * car.rating : car.price;
  
  return { description, newPrice };
}