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redundant-ifelse

Flag ifelse(c, TRUE, FALSE) (which is just c) and ifelse(c, FALSE, TRUE) (which is !c).

An ifelse that returns its own condition:

flag <- ifelse(cond, TRUE, FALSE)

warning: redundant-ifelse
 --> example.R:1:9
  |
1 | flag <- ifelse(cond, TRUE, FALSE)
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^ `ifelse()` returning `TRUE`/`FALSE` is redundant
  = help: Use the condition directly, or negate it.

After applying the fix:

flag <- cond