filesstrings (version 3.1.1)

str_locate_nth: Get the indices of the \(n\)th instance of a pattern.

Description

See strex::str_locate_nth().

Usage

str_locate_nth(string, pattern, n)
locate_nth(string, pattern, n)
str_locate_first(string, pattern)
locate_first(string, pattern)
str_locate_last(string, pattern)
locate_last(string, pattern)

Arguments

string

A character vector.

pattern

The pattern to look for.

The default interpretation is a regular expression, as described in stringi::stringi-search-regex.

To match a without regular expression (i.e. as a human would), use coll(). For details see stringr::regex().

n

A vector of integerish values. Must be either length 1 or have length equal to the length of string. Negative indices count from the back: while n = 1 and n = 2 correspond to first and second, n = -1 and n = -2 correspond to last and second-last. n = 0 will return NA.