獲取具有屬性的數組的長度

Question

所以，我有這個數組的屬性，我想要得到它的長度。在這種情況下，數組的長度應爲2，因爲只有2「項目」

{"items":[{"value":"2","valor":0,"name":"Limpeza"}, 
{"value":"6","valor":0,"name":"TECREMOVE"}]} 

我已經嘗試過exist.length但它返回undefined。我怎樣才能得到它的長度？

Answer 1

var myObj = {"items":[{"value":"2","valor":0,"name":"Limpeza"}, 
    {"value":"6","valor":0,"name":"TECREMOVE"}]}; 

var arrLength = myObj.items.length; 

myObj.items - 是陣列，myObj.items.length - 長度陣列。

Answer 2

您遇到的object其中它的一個名爲items性質是array與2

嘗試的長度：

var data = {"items":[{"value":"2","valor":0,"name":"Limpeza"}, 
{"value":"6","valor":0,"name":"TECREMOVE"}]}; 

var len = data.items.length;