rx_end_of_line: Match the expression only if it appears till the end of the...

In RVerbalExpressions: Create Regular Expressions Easily

Match the expression only if it appears till the end of the line.

Description

Control whether to match the expression only if it appears till the end of the line. Basically, append a $ to the end of the expression. The dollar sign is considered an anchor and matches the position of characters. It can be used to "anchor" the regex match at a certain position, in this case the dollar sign matches right after the last character in the string.

Usage

rx_end_of_line(.data = NULL, enable = TRUE)

Arguments

.data	Expression to match, typically pulled from the pipe %>%
enable	Whether to enable this behavior, defaults to TRUE

References

Anchors: https://www.regular-expressions.info/anchors.html

Examples

rx_end_of_line(enable = TRUE)
rx_end_of_line(enable = FALSE)
rx_end_of_line("abc", enable = TRUE)

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

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

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