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

In RVerbalExpressions: Create Regular Expressions Easily

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

RVerbalExpressions documentation built on May 29, 2024, 6:47 a.m.