RVerbalExpressions (version 0.1.1)

rx_start_of_line: Match the expression only if it appears from beginning of line.

Description

Control whether to match the expression only if it appears from the beginning of the line.

Usage

rx_start_of_line(.data = NULL, enable = TRUE)

Arguments

.data

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

enable

Whether to enable this behavior, defaults to TRUE

Examples

rx_start_of_line(enable = TRUE)
rx_start_of_line(enable = FALSE)

# create expression
x <- rx() %>%
  rx_start_of_line() %>%
  rx_find("apple")

grepl(x, "pineapple") # should be false
grepl(x, "apple")     # should be true