Match upper case letters.

Matches upper case letters only.

rx_uppercase(.data = NULL, inverse = FALSE)

Arguments

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

Examples

rx_uppercase()
#> [1] "[A-Z]"
rx_uppercase(inverse = TRUE)
#> [1] "[^A-Z]"

# create an expression
x <- rx_uppercase()
y <- rx_uppercase(inverse = TRUE)

# create input
string <- "Apple 1!"

# extract match
regmatches(string, gregexpr(x, string))
#> [[1]]
#> [1] "A"
#> 
regmatches(string, gregexpr(y, string))
#> [[1]]
#> [1] "p" "p" "l" "e" " " "1" "!"
#>