str_view
View HTML rendering of regular expression match.
str_view shows the first match; str_view_all shows all
the matches. To build regular expressions interactively, check out the
RegExplain RStudio addin.
Usage
str_view(string, pattern, match = NA)str_view_all(string, pattern, match = NA)
Arguments
- string
Input vector. Either a character vector, or something coercible to one.
- pattern
Pattern to look for.
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 wantcoll()which respects character matching rules for the specified locale.Match character, word, line and sentence boundaries with
boundary(). An empty pattern, "", is equivalent toboundary("character").- match
If
TRUE, shows only strings that match the pattern. IfFALSE, shows only the strings that don't match the pattern. Otherwise (the default,NA) displays both matches and non-matches.
Examples
# NOT RUN {
str_view(c("abc", "def", "fgh"), "[aeiou]")
str_view(c("abc", "def", "fgh"), "^")
str_view(c("abc", "def", "fgh"), "..")
# Show all matches with str_view_all
str_view_all(c("abc", "def", "fgh"), "d|e")
# Use match to control what is shown
str_view(c("abc", "def", "fgh"), "d|e")
str_view(c("abc", "def", "fgh"), "d|e", match = TRUE)
str_view(c("abc", "def", "fgh"), "d|e", match = FALSE)
# }