如何清空对象中的元素？

Question

我有一个这样的对象：

var measure = {
    "name":{"id":1},
    "name2":{"id2":2},
    "name3":{"id3":3}
};

如何在单击按钮时清空对象中的元素。

http://jsfiddle.net/5bdugpt6/

预期的结果是 measure = {};

谢谢您的帮助

Answer 1

以下是三种方式：

1. “手动”删除属性

delete measure.name;
delete measure.name2;
delete measure.name3;

2. 在 for-in 循环中删除属性

for(prop in measure) {
    delete measure[prop];
}

3. 用新对象替换对象

measure = {};

演示