如何從javascript關聯數組中刪除對象？ - How do I remove objects from a javascript associative array?

問題：

Suppose I have this code: 假設我有這個代碼：

var myArray = new Object();
myArray["firstname"] = "Bob";
myArray["lastname"] = "Smith";
myArray["age"] = 25;

Now if I wanted to remove "lastname"?....is there some equivalent of 如今，若是我想刪除「姓氏」？....是否有一些至關於
myArray["lastname"].remove() ? myArray["lastname"].remove() ？

(I need the element gone because the number of elements is important and I want to keep things clean.) （我須要元素消失，由於元素的數量很重要，我想保持清潔。）

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解決方案：

參考一： https://stackoom.com/question/1S0z/如何從javascript關聯數組中刪除對象
參考二： https://oldbug.net/q/1S0z/How-do-I-remove-objects-from-a-javascript-associative-array