Match a whitespace character.

Source: R/special_characters.R

Match a whitespace character.

rx_whitespace(.data = NULL, inverse = FALSE)

Arguments

.data

Expression to append, typically pulled from the pipe %>%
inverse

Invert match behavior, defaults to FALSE (match whitespace). Use TRUE to not match whitespace.

Details

Match a whitespace character (one of space, tab, carriage return, new line, vertical tab and form feed).

  1. space: https://codepoints.net/U+0020

  2. tab: https://codepoints.net/U+0009

  3. carriage return: https://codepoints.net/U+000D

  4. new line: https://codepoints.net/U+000

  5. vertical tab: https://codepoints.net/U+000B

  6. form feed: https://codepoints.net/U+000C

Examples

# match whitespace, default
rx_whitespace()
#> [1] "\\s"

# dont match whitespace
rx_whitespace(inverse = TRUE)
#> [1] "[^ \t\r\n]"

# create an expression
x <- rx_whitespace()

# create input
string <- "1 apple"

# extract match
regmatches(string, regexpr(x, string))
#> [1] " "

# extract no whitespace by inverting behavior
y <- rx_whitespace(inverse = TRUE)
regmatches(string, gregexpr(y, string))
#> [[1]]
#> [1] "1" "a" "p" "p" "l" "e"
#>