generater 初理解

function* comparePrice(){
    while(true){
        yield Math.random()*100
    }
}
var limitPrice = 50
var price = 100
while(price > limitPrice){
	console.log(`this is price ${price}`)
    price = comparePrice().next().value
}
console.log(`this is lastPrice ${price}`)
// this is price 62.20384758361717
// this is lastPrice 32.9677543460043