es6中find方法

find() 方法返回数组中满足提供的测试函数的第一个元素的值。否则返回 undefined。

var array1 = [, , , , ];
var found = array1.find(function(element) {
  return element > ;
});
console.log(found);

var inventory = [
    {name: 'apples', quantity: },
    {name: 'bananas', quantity: },
    {name: 'cherries', quantity: }
];

function findCherries(fruit) {
    return fruit.name === 'cherries';
}

console.log(inventory.find(findCherries)); // { name: 'cherries', quantity: 5 }