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lintr (version 3.1.2)

lengths_linter: Require usage of lengths() where possible

Description

lengths() is a function that was added to base R in version 3.2.0 to get the length of each element of a list. It is equivalent to sapply(x, length), but faster and more readable.

Usage

lengths_linter()

Arguments

Tags

best_practices, efficiency, readability

See Also

linters for a complete list of linters available in lintr.

Examples

Run this code
# will produce lints
lint(
  text = "sapply(x, length)",
  linters = lengths_linter()
)

lint(
  text = "vapply(x, length, integer(1L))",
  linters = lengths_linter()
)

lint(
  text = "purrr::map_int(x, length)",
  linters = lengths_linter()
)

# okay
lint(
  text = "lengths(x)",
  linters = lengths_linter()
)

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