例如假设我插入数据如下
doc1 = [{url: 'http://domain.com/pic1.jpg'}, {url: 'http://domain.com/pic2.jpg'}]
doc2 = [{url: 'http://domain.com/pic3.jpg'}, {url: 'http://domain.com/pic4.jpg'}]
db.picture.insert(doc1)
db.picture.insert(doc2)
我怎么能用'https'替换所有'http'?