str_extract_between: Extract characters in a string which occur after a specified...

In johncassil/stringr.plus: string functions that are "too specific for stringr" for Hadley Wickham

Description

Vectorised over 'string' and 'pattern'.

Usage

str_extract_between(
  string,
  pattern1,
  pattern2,
  which_pattern1 = "first",
  which_pattern2 = "last"
)

Arguments

string	The string from which to extract.
pattern1	Pattern to look for before the return content of a string. The default interpretation is a regular expression, as described in stringi::stringi-search-regex. Control options with regex(). Match a fixed string (i.e. by comparing only bytes), using fixed(). This is fast, but approximate. Generally, for matching human text, you'll want coll() which respects character matching rules for the specified locale. Match character, word, line and sentence boundaries with boundary(). An empty pattern, "", is equivalent to boundary("character").
pattern2	Pattern to look for after the return content of a string. See pattern1 for more details.
which_pattern1	If there are multiple patterns, what should the function return? "first" (the default) returns the first occurrence of pattern1
which_pattern2	If there are multiple patterns, what should the function return? "last" (the default) returns the last occurrence of pattern2

Value

The part of the string after the first pattern and before the second pattern.

Examples

test_string <- 'url.com/string_before_pattern_after-another_string_with_pattern2/'
str_extract_between(string = test_string, pattern1 = "_pattern_", pattern2 = "_pattern2")

johncassil/stringr.plus documentation built on Oct. 9, 2021, 7:56 p.m.