Package index

Linting

Configuration

Individual linters

T_and_F_symbol_linter(): T and F symbol linter
absolute_path_linter(): Absolute path linter
all_equal_linter(): Warn about invalid usage of all.equal()
any_duplicated_linter(): Require usage of anyDuplicated(x) > 0 over any(duplicated(x))
any_is_na_linter(): Require usage of anyNA(x) over any(is.na(x))
assignment_linter(): Assignment linter
backport_linter(): Backport linter
boolean_arithmetic_linter(): Require usage of boolean operators over equivalent arithmetic
brace_linter(): Brace linter
class_equals_linter(): Block comparison of class with ==
coalesce_linter(): Encourage usage of the null coalescing operator %||%
commas_linter(): Commas linter
commented_code_linter(): Commented code linter
comparison_negation_linter(): Block usages like !(x == y) where a direct relational operator is appropriate
condition_call_linter(): Recommend usage of call. = FALSE in conditions
condition_message_linter(): Block usage of paste() and paste0() with messaging functions using ...
conjunct_test_linter(): Force && conditions to be written separately where appropriate
consecutive_assertion_linter(): Force consecutive calls to assertions into just one when possible
consecutive_mutate_linter(): Require consecutive calls to mutate() to be combined when possible
cyclocomp_linter(): Cyclomatic complexity linter
download_file_linter(): Recommend usage of a portable mode value for downloading files
duplicate_argument_linter(): Duplicate argument linter
empty_assignment_linter(): Block assignment of {}
equals_na_linter(): Equality check with NA linter
expect_comparison_linter(): Require usage of expect_gt(x, y) over expect_true(x > y) (and similar)
expect_identical_linter(): Require usage of expect_identical(x, y) where appropriate
expect_length_linter(): Require usage of expect_length(x, n) over expect_equal(length(x), n)
expect_named_linter(): Require usage of expect_named(x, n) over expect_equal(names(x), n)
expect_not_linter(): Require usage of expect_false(x) over expect_true(!x)
expect_null_linter(): Require usage of expect_null for checking NULL
expect_s3_class_linter(): Require usage of expect_s3_class()
expect_s4_class_linter(): Require usage of expect_s4_class(x, k) over expect_true(is(x, k))
expect_true_false_linter(): Require usage of expect_true(x) over expect_equal(x, TRUE)
expect_type_linter(): Require usage of expect_type(x, type) over expect_equal(typeof(x), type)
fixed_regex_linter(): Require usage of fixed=TRUE in regular expressions where appropriate
for_loop_index_linter(): Block usage of for loops directly overwriting the indexing variable
function_argument_linter(): Function argument linter
function_left_parentheses_linter(): Function left parentheses linter
function_return_linter(): Lint common mistakes/style issues cropping up from return statements
if_not_else_linter(): Block statements like if (!A) x else y
if_switch_linter(): Require usage of switch() over repeated if/else blocks
ifelse_censor_linter(): Block usage of ifelse() where pmin() or pmax() is more appropriate
implicit_assignment_linter(): Avoid implicit assignment in function calls
implicit_integer_linter(): Implicit integer linter
indentation_linter(): Check that indentation is consistent
infix_spaces_linter(): Infix spaces linter
inner_combine_linter(): Require c() to be applied before relatively expensive vectorized functions
is_numeric_linter(): Redirect is.numeric(x) || is.integer(x) to just use is.numeric(x)
keyword_quote_linter(): Block unnecessary quoting in calls
length_levels_linter(): Require usage of nlevels over length(levels(.))
length_test_linter(): Check for a common mistake where a size check like 'length' is applied in the wrong place
lengths_linter(): Require usage of lengths() where possible
library_call_linter(): Library call linter
line_length_linter(): Line length linter
list2df_linter(): Recommend direct usage of data.frame() to create a data.frame from a list
list_comparison_linter(): Block usage of comparison operators with known-list() functions like lapply
literal_coercion_linter(): Require usage of correctly-typed literals over literal coercions
matrix_apply_linter(): Require usage of colSums(x) or rowSums(x) over apply(x, ., sum)
missing_argument_linter(): Missing argument linter
missing_package_linter(): Missing package linter
namespace_linter(): Namespace linter
nested_ifelse_linter(): Block usage of nested ifelse() calls
nested_pipe_linter(): Block usage of pipes nested inside other calls
nonportable_path_linter(): Non-portable path linter
nrow_subset_linter(): Block usage of nrow(subset(x, .))
numeric_leading_zero_linter(): Require usage of a leading zero in all fractional numerics
nzchar_linter(): Require usage of nzchar where appropriate
object_length_linter(): Object length linter
object_name_linter(): Object name linter
object_overwrite_linter(): Block assigning any variables whose name clashes with a base R function
object_usage_linter(): Object usage linter
one_call_pipe_linter(): Block single-call magrittr pipes
outer_negation_linter(): Require usage of !any(x) over all(!x), !all(x) over any(!x)
package_hooks_linter(): Package hooks linter
paren_body_linter(): Parenthesis before body linter
paste_linter(): Raise lints for several common poor usages of paste()
pipe_call_linter(): Pipe call linter
pipe_consistency_linter(): Pipe consistency linter
pipe_continuation_linter(): Pipe continuation linter
pipe_return_linter(): Block usage of return() in magrittr pipelines
print_linter(): Block usage of print() for logging
quotes_linter(): Character string quote linter
redundant_equals_linter(): Block usage of ==, != on logical vectors
redundant_ifelse_linter(): Prevent ifelse() from being used to produce TRUE/FALSE or 1/0
regex_subset_linter(): Require usage of direct methods for subsetting strings via regex
rep_len_linter(): Require usage of rep_len(x, n) over rep(x, length.out = n)
repeat_linter(): Repeat linter
return_linter(): Return linter
routine_registration_linter(): Identify unregistered native routines
sample_int_linter(): Require usage of sample.int(n, m, ...) over sample(1:n, m, ...)
scalar_in_linter(): Block usage like x %in% "a"
semicolon_linter(): Semicolon linter
seq_linter(): Sequence linter
sort_linter(): Check for common mistakes around sorting vectors
spaces_inside_linter(): Spaces inside linter
spaces_left_parentheses_linter(): Spaces before parentheses linter
sprintf_linter(): Require correct sprintf() calls
stopifnot_all_linter(): Block usage of all() within stopifnot()
string_boundary_linter(): Require usage of startsWith() and endsWith() over grepl()/substr() versions
strings_as_factors_linter(): Identify cases where stringsAsFactors should be supplied explicitly
system_file_linter(): Block usage of file.path() with system.file()
terminal_close_linter(): Prohibit close() from terminating a function definition
todo_comment_linter(): TODO comment linter
trailing_blank_lines_linter(): Trailing blank lines linter
trailing_whitespace_linter(): Trailing whitespace linter
undesirable_function_linter(): Undesirable function linter
undesirable_operator_linter(): Undesirable operator linter
unnecessary_concatenation_linter(): Unneeded concatenation linter
unnecessary_lambda_linter(): Block usage of anonymous functions in iteration functions when unnecessary
unnecessary_nesting_linter(): Block instances of unnecessary nesting
unnecessary_placeholder_linter(): Block usage of pipeline placeholders if unnecessary
unreachable_code_linter(): Block unreachable code and comments following return statements
unused_import_linter(): Check that imported packages are actually used
vector_logic_linter(): Enforce usage of scalar logical operators in conditional statements
which_grepl_linter(): Require usage of grep over which(grepl(.))
whitespace_linter(): Whitespace linter
yoda_test_linter(): Block obvious "yoda tests"

Linting

Configuration

Individual linters

Groups of linters

Common default configurations

Utilities