set
SET: Can only store unique values,
And does not maintain order
- HashSet can have null, order is not guaranteed
- LinkedHashSet can have null and keeps the order
- TreeSet sorts the order and don't accept nullset
SET: Can only store unique values,
And does not maintain order
- HashSet can have null, order is not guaranteed
- LinkedHashSet can have null and keeps the order
- TreeSet sorts the order and don't accept null$set
// https://mongodb.github.io/node-mongodb-native/markdown-docs/insert.html
//To update only selected fields, $set operator needs to be used. Following replacement object replaces author value but leaves everything else intact.
collection.update({_id:"123"}, {$set: {author:"Jessica"}});Copyright © 2021 Codeinu
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