js遍历data&&截取data&&传参格式

获取数据：遍历data->截取data；不取第一个值->输出data

1. 第1种 forEach循环
2. 第2种 for循环

//第1种 forEach循环
var data = [];
testData.forEach((item, index, testData) => { // item为arr的元素，index为下标，arr原数组
	if(index == 0){
		return false;
	} 
	else{
		data.push(item)
	}
});
console.log(data);

//第2种 for循环
var data1 = [];
for(var i = 0, len = testData.length; i < len; i++) { // 这里的i是代表数组的下标
	switch(i){
		case 0: break;
		default:data1.push(testData[i])
	}
}
console.log(data1) 

//测试数据
var testData = [
{
    "receiverId": "ID",
    "quantity": "转出数量"
  },
  {
    "receiverId": 10010,
    "quantity": 10
  },
  {
    "receiverId": 10011,
    "quantity": 10
  },
  {
    "receiverId": 10012,
    "quantity": 10
  },
  {
    "receiverId": 10013,
    "quantity": 10
  },
  {
    "receiverId": 10014,
    "quantity": 10
  },
  {
    "receiverId": 10015,
    "quantity": 10
  },
  {
    "receiverId": 10016,
    "quantity": 10
  },
  {
    "receiverId": 10017,
    "quantity": 10
  },
  {
    "receiverId": 10018,
    "quantity": 10
  },
  {
    "receiverId": 10019,
    "quantity": 10
  }
];

交互必用：转格式

//ajax传参：转换data格式   转为string
	console.log(data);
	console.log(typeof(data));//object
	//console.log(JSON.parse(data));
	var prams = {
		'userCounts':data
	}
	console.log(prams);
	console.log(typeof(prams));//object
	
	console.log(JSON.stringify(prams));
	prams = JSON.stringify(prams)
	console.log(typeof(prams));//string