相关疑难解决方法(0)

我有一组具有相同属性的对象.每个对象有大约一百个属性.我想在一个新的数组中只保留少数几个:

var dummyArray = [{ "att1": "something", "att2": "something", ..., "att100": "something"}, { "att1": "something", "att2": "something", ..., "att100": "something"}, ...];

如何过滤/映射/缩小...并提取有趣的键？

const newDummArray = dummyArray.map(function(item) { 
    delete item.att1; 
    delete item.att3; 
    delete item.att15;
    // ... (long list)
    return item; 
});

我怎么能只保留att20,att30,att70,att80为每个对象,并删除其余？