fintersect and fsetdiff handle column scope conflicts better
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Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 42/100
Research direction
Start by reading the change in PR #5256 and reproducing the verbose := example from the issue. Then locate the implementations of fintersect and fsetdiff and assess the proposed use of set(); done means column-scope conflicts are handled without the current non-optimal behavior.
Written by the indexing model from the issue text.
Description
Change added in https://github.com/Rdatatable/data.table/pull/5256 is not optimal, using verbose = T shows why.
> z[, a := rowidv(.z), env=list(.z = z), verbose=T]
Argument 'j' after substitute: `:=`(a, rowidv(structure(list(a = c(1, 1), b = 2:3), row.names = c(NA, -2L), class = c("data.table", "data.frame"), .internal.selfref = <pointer: 0x5590368f0190>)))
Better will be to simply use set()
- Dominant language
- R
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- 3.9k
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- 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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