fcase() could do vectorized switch on character first input

Open
#4,820 3 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
35/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
r
Domain
data

Research direction

Use fcase as the entry point and first compare its current argument behavior with the SQL CASE WHEN examples in the issue. Work out how the proposed character-first form should handle the shown values and default, then verify that the example produces the corresponding switched output.

Written by the indexing model from the issue text.

Description

feature request

A cool feature of SQL CASE WHEN is

SELECT
  CASE x
    WHEN 1 then '1'
    WHEN 2 then '2'
    ELSE '>2'
  END as switched_case

It would be nice to mimic this in fcase:

fcase(
  x,
  1, '1',
  2, '2',
  default = '>2'
)
Dominant language
R
Stars
3.9k
Forks
1.1k
Avg merge
14h 4m
Merged PRs (30d)
4

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from Rdatatable/data.table

All issues in Rdatatable/data.table

Similar issues

More R issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.