转换方法
var people = ["p1", "p2", "p3", 1, 2, 3, true, false];
console.log(people);
console.log(typeof people);
console.log(people instanceof Array);
console.log(Array.isArray(people));
console.log(people.toString());
console.log(typeof people.toString());
console.log(people.toLocaleString());
console.log(typeof people.toLocaleString());
console.log(people.join()); // 默认用逗号, 分开各个元素
console.log(people.join(','));
console.log(people.join(' '));
console.log(people.join('-'));