checkmate (version 1.0)

checkList: Check if an argument is a list

Description

Check if an argument is a list

Usage

checkList(x, types = character(0L), any.missing = TRUE,
  all.missing = TRUE, len = NULL, min.len = NULL, max.len = NULL,
  unique = FALSE, names = NULL)
assertList(x, types = character(0L), any.missing = TRUE,
  all.missing = TRUE, len = NULL, min.len = NULL, max.len = NULL,
  unique = FALSE, names = NULL, .var.name)
testList(x, types = character(0L), any.missing = TRUE, all.missing = TRUE,
  len = NULL, min.len = NULL, max.len = NULL, unique = FALSE,
  names = NULL)

Arguments

x

[ANY] Object to check.

.var.name

[character(1)] Name for x. Defaults to a heuristic to determine the name using deparse and substitute.

...

[ANY] Additional parameters used in a call of checkVector.

types

[character] Character vector of class names. Each list element must inherit from at least one of the provided types. The types logical, integer, integerish, double, n

any.missing

[logical(1)] Are vectors with missing values allowed? Default is TRUE.

all.missing

[logical(1)] Are vectors with only missing values allowed? Default is TRUE.

len

[integer(1)] Exact expected length of x.

min.len

[integer(1)] Minimal length of x.

max.len

[integer(1)] Maximal length of x.

unique

[logical(1)] Must all values be unique? Default is FALSE.

names

[character(1)] Check for names. See checkNamed for possible values. Default is any which performs no check at all.

Value

• Depending on the function prefix: If the check is successful, all functions return TRUE. If the check is not successful, assertList throws an error message, testList returns FALSE and checkList returns a string with the error message.

See Also

Other basetypes: assertArray, checkArray, testArray; assertAtomicVector, checkAtomicVector, testAtomicVector; assertAtomic, checkAtomic, testAtomic; assertCharacter, checkCharacter, testCharacter; assertComplex, checkComplex, testComplex; assertDataFrame, checkDataFrame, testDataFrame; assertEnvironment, checkEnvironment, testEnvironment; assertFactor, checkFactor, testFactor; assertFunction, checkFunction, testFunction; assertIntegerish, checkIntegerish, testIntegerish; assertInteger, checkInteger, testInteger; assertLogical, checkLogical, testLogical; assertMatrix, checkMatrix, testMatrix; assertNumeric, checkNumeric, testNumeric; assertVector, checkVector, testVector

Examples

testList(list())
 testList(as.list(iris), types = c("numeric", "factor"))