Regular Expressions 101

All the errors detected are listed below, from left to right, as they appear in the pattern.

/ Delimiter must be escaped with `\`

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

/

New

phone_nums = c(
    "(123) 456-7890", "(123)456-7890", "1234567890",
    "123 456 7890", "123-456-7890", "123.456.7890")
not_phone_nums = c("123.456 7890", "123-456.7890", 
                   "(123 456 7890", "a23.b123.c1234",
                   "cleveland rocks"
                  )
stopifnot(all(str_detect(phone_nums, re5)))
stopifnot(! any(str_detect(not_phone_nums, re5)))

Extraction