如何从javascript关联数组中删除对象？ - How do I remove objects from a javascript associative array?

问题：

Suppose I have this code: 假设我有这个代码：

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，若是我想删除“姓氏”？....是否有一些至关于
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.) （我须要元素消失，由于元素的数量很重要，我想保持清洁。）

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解决方案：

参考一： https://stackoom.com/question/1S0z/如何从javascript关联数组中删除对象
参考二： https://oldbug.net/q/1S0z/How-do-I-remove-objects-from-a-javascript-associative-array