Match lower case letters.

Matches lower case letters only.

rx_lowercase(.data = NULL, inverse = FALSE)

Arguments

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

Examples

rx_lowercase()
#> [1] "[a-z]"
rx_lowercase(inverse = TRUE)
#> [1] "[^a-z]"

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

# create input
string <- "Apple 1!"

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