我有这些数据:
[]
0:{time: 1525355921817, sym: "AAPL", price: 169.16, size: 98, stop: false, …}
1:{time: 1525355923216, sym: "AAPL", price: 170.15, size: 6, stop: false, …}
2:{time: 1525355923216, sym: "AAPL", price: 170.06, size: 57, stop: false, …}
我需要将其改为以下格式:
0:{"time": 1525355921817, "sym": "AAPL", "price": 169.16, "index": 0}
1:{"time": 1525355923216, "sym": "AAPL", "price": 170.15, "index": 1}
2:{"time": 1525355923216, "sym": "AAPL", "price": 170.06, "index": 2}
基本上只是删除大小并停止并添加索引列。我还需要能够以this.data.price
的形式访问它并获取所有价格值......这甚至可能吗?此数据来自角度
我怎样才能做到这一点? (请注意,我不是角色或javascript的有经验的用户)
答案 0 :(得分:4)
您可以let data = [{time: 1525355921817, sym: "AAPL", price: 169.16, size: 98, stop: false},{time: 1525355923216, sym: "AAPL", price: 170.15, size: 6, stop: false},{time: 1525355923216, sym: "AAPL", price: 170.06, size: 57, stop: false}];
let result = data.map((o, i) => ({
time: o.time,
sym: o.sym,
price: o.price,
index: i
}));
console.log(result);
对象数组。您可以解构每个对象以获得更短的代码。
map

答案 1 :(得分:1)
您可以使用static void ReadFolderFiles()
{
// The parent folder of "my_folder" will be **exe**'s folder:
var dir = new DirectoryInfo("my_folder\\sub_folder");
// Or: DirectoryInfo("my_folder")
foreach(FileInfo file in dir.EnumerateFiles())
{
System.Console.WriteLine(file.Name);
}
}
创建所需的输出:
.map()

答案 2 :(得分:0)
我还需要能够以this.data.price的形式访问它并获取所有价格值......这甚至可能吗?
假设数组位于data
:
const groupValue = (arr, key) => arr[key] = arr.map(el => el[key]);
groupValue(this.data, "price");
console.log(this.data.price);