console.log(1 === '1')
Object.assign()
console.log(0.1 + 0.2 === 0.3)
console.log(typeof null)
Function.prototype.bind()
console.log([1,2,3].map(parseInt))
console.log(typeof (function*(){}))
Object.getPrototypeOf([])
typeof new Number(5)
console.log([1,2,3].reduce((a,b)=>a+b,0))