從命名索引JS

Question

獲取數組值我有一個JS變量，它接收帶JavaScriptSerializer的序列化C＃列表。

傳遞給JS變量序列化後的字符串是這樣的：

{"Date":"April 2017 - April 2017","Source":"Foo","Type":"Bar","Value":14}{"Date":"April 2017 - April 2017","Source":"Foo","Type":"Bar","Value":14} 

我願把所有的「值」數組中的x和所有的「日期」在排列Y。

當我做x: source["Date"]和y: source["Value"]時，x和y保持空白。

這是爲什麼？

Answer 1

您的Json格式不正確，但如果您將其更正爲適當的Json格式，則可以使用JavaScript地圖來完成您所需的內容。

let arr = '[{"Date":"April 2017 - April 2017","Source":"Foo","Type":"Bar","Value":14}, 
      {"Date":"April 2017 - April 2017","Source":"Foo","Type":"Bar","Value":14}]'; 

let source = JSON.parse(arr); 

let x = source.map(x=> x.Date); 
let y = source.map(x=> x.Value); 

console.log(x); 
//[ 'April 2017 - April 2017', 'April 2017 - April 2017' ] 

console.log(y); 
//[ 14, 14 ]