Check if the provided object has expected length

Check if the provided object has expected length

Usage

isOfLength(object, nbElements)

validateIsOfLength(object, nbElements)

Arguments

object

An object or a list of objects

nbElements

number of elements that are supposed in object

Value

• isOfLength() returns TRUE if the object or all objects inside the list have nbElements.

• For validateIsOfLength(), if validations are successful, NULL is returned. Otherwise, error is signaled.

Note

Only the first level of the given list is considered.

Examples

df <- data.frame(x = c(1, 2, 3))

isOfLength(df, 1) # TRUE
#> [1] TRUE
isOfLength(df, 3) # FALSE
#> [1] FALSE

validateIsOfLength(list(1, 2), 2L) # NULL
#> NULL
# validateIsOfLength(c("3", "4"), 3L) # error