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Test whether a string is a valid date

Source: R/is_valid_date_str.R
is_valid_date_str.Rd

Taken from github.com/rmsharp/rmsutilityr

Usage

is_valid_date_str(
  date_str,
  format = "%d-%m-%Y %H:%M:%S",
  optional = FALSE
)

Arguments

date_str

character vector with 0 or more dates

format

character vector of length one. Retained for backward compatibility; the current implementation validates dates with anytime() and does not use format.

optional

logical value indicating that NA should be returned instead of FALSE for strings that are not valid dates. Defaults to FALSE.

Value

A logical vector with one element per element of date_str (zero-length input gives a zero-length result) indicating whether or not each string is a valid date. Elements are NA instead of FALSE when optional is TRUE. Numeric input is never treated as a date and always gives FALSE.

Examples

is_valid_date_str(c(
  "13-21-1995", "20-13-98", "5-28-1014",
  "1-21-15", "2-13-2098", "25-28-2014"
), format = "%m-%d-%y")
#> [1] FALSE FALSE  TRUE  TRUE  TRUE FALSE