Enhanced functionality of 'mult' argument
Nobody has claimed this yet.
Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 35/100
Research direction
Start by locating the existing implementation and tests for the mult argument in data.table, then read the related discussions in issues #651, #655, and #1233. Clarify the intended behavior for each listed value before changing anything; done means the supported options work consistently and the corresponding tests cover them.
Written by the indexing model from the issue text.
Description
This is a merge of issues #651, #655 and #1233 since they are very much related. Will close all the other issues.
Note: Remember to thank @MuhammadWaliji and @MichaelChirico for filing those FRs.
Enhanced functionality for mult = argument:
From #651:
-
1L- similar to "first" -
.N- similar to "last" -
"sample"- 'random' -sample(.N, size = 1L) -
-1L- all but first -
c(FALSE, TRUE)- even rows
See this link for more info from the data.table mailing list. Also refer to #651 if necessary.
- 'error' - Error when any multiple matches are found. (#655)
- 'none' or
0L? - don't return multiple matches. (#1233)
- Dominant language
- R
- Stars
- 3.9k
- Forks
- 1.1k
- Avg merge
- 14h 4m
- Merged PRs (30d)
- 4
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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