Book Example
Indexes Index Introduction Index Concepts Indexing Tutorials Indexing Reference
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var cursor = db.test.find();
while (cursor.hasNext()) {
var x = cursor.next();
print("Before: "+x['item']);
x['item'] = x['item'].replace('红包', '外快');
print("After: "+x['item']);
db.test.update({_id : x._id}, x);
}