negate on individual key columns
Nobody has claimed this yet.
Assessment
- Difficulty
- 5/5
- Estimated time
- Over a week
- Newbie friendliness
- 25/100
Research direction
Start with the linked Stack Overflow example and reproduce the data.table expressions shown in the issue, including negation of NA and numeric key values. Define done as supporting the requested not() behavior while retaining fast binary searches for those expressions; the issue names no source file or test to begin from.
Written by the indexing model from the issue text.
Description
According to http://stackoverflow.com/questions/29330106/filter-data-table-for-is-na
It would be nice to have a not() function that allows fast binary searches for expressions like :
dt[!is.na(A) & B!=1]
i.e.
dt[.(not(NA_Integer_), not(1))]
- 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.
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- Open a pull request that references the issue number.
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