rx_space: Match a space character.
In RVerbalExpressions: Create Regular Expressions Easily

Matches a space character.

1	rx_space(.data = NULL, inverse = FALSE)

`.data`	Expression to append, typically pulled from the pipe `%>%`
`inverse`	Invert match behavior, defaults to `FALSE` (match space). Use `TRUE` to not match space.

# match space, default
rx_space()

# dont match space
rx_space(inverse = TRUE)

# create an expression
x <- rx_space()

# create input
string <- "1 apple\t"

# extract match
regmatches(string, regexpr(x, string))

# extract no whitespace by inverting behavior
y <- rx_space(inverse = TRUE)
regmatches(string, gregexpr(y, string))