Inspect birthday-component of a string

Check whether a given string contains exactly one two-digit number that represents a valid day of the month (between 01 and 31). The string is assumed to be a code (e.g., a SGIC), which may include letters and digits.

Usage

inspect_birthday(code)

Arguments

code

A character string containing a SGIC or similar code that may include a numeric birthday-component.

Value

A logical value: `TRUE` if the string contains only one valid birthday-component (between 01 and 31), otherwise `FALSE`.

Examples

inspect_birthday("DEF66") # FALSE - 66 is not a valid day
#> [1] FALSE
inspect_birthday("GHI02") # TRUE - 02 is a valid day
#> [1] TRUE
inspect_birthday("ABC12DEF34") # FALSE - Multiple numeric components
#> [1] FALSE
inspect_birthday("XYZ") # FALSE - No numeric component
#> [1] FALSE
inspect_birthday("JKL31") # TRUE - 31 is a valid day
#> [1] TRUE