nodejs 遍历数组: 参考: https://blog.csdn.net/he_min/article/details/82912729
var array = [1,2,3];
// 方式一:
array.forEach(function(v,index,a){
console.log(v);
console.log(index);
console.log(a);
});
// 方式二:
array.forEach(v => console.log(v));