CodeRoll | Frontend

console.log(!!null)
console.log(!!"")
console.log(!!1)

const result =
  [[0, 1], [2, 3]].reduce(
    (acc, cur) => {
      return acc.concat(cur)
    },
    [1, 2]
  )

console.log(result)

(() => {
  let x, y
  try {
    throw new Error()
  } catch (x) {
    (x = 1), (y = 2)
    console.log(x)
  }
  console.log(x)
  console.log(y)
})()

const numbers = [1, 2, 3]
numbers[10] = 11
console.log(numbers)

function sayHi() {
  return (() => 0)()
}

console.log(typeof sayHi())

const person = { name: "John" }

function sayHi(age) {
  console.log(`${this.name} is ${age}`)
}

sayHi.call(person, 30)
sayHi.bind(person, 30)