Use Cursor().Seek() in LastN method of the List datatype instead of manually getting to the desired position #6
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…ch to get to the n element and fetch the n last elements
|
Thank you! I'll test and then merge this. |
|
Tested and merged. 🙂 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
With bucket.Cursor().Last(), you get the last key and value pair in a []byte. The key is convertible to uint64 with binary.BigEndian.Uint64([]byte) since it has been saved as a []byte representation of the uint64 returned from bucket.NextSequence() in the Add method.
The number returned by the last key is then used to get to the starting position from which to fetch the last N elements of the list using bucket.Cursor().Seek(startPos). bucket.Cursor().Next() returns either the next key and value pair or a nil key if the last k/v pair has been reached.