Match the expression only if it appears from beginning of line. — start_of_line • RVerbalExpressions

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

start_of_line(enable = TRUE)

Arguments

enable	Whether to enable this behavior, defaults to `TRUE`

Examples

start_of_line(enable = TRUE)
#> [1] "^"
start_of_line(enable = FALSE)

# create expression
x <- start_of_line() %>%
  then("apple")

grepl(x, "pineapple") # should be false
#> [1] FALSE
grepl(x, "apple")     # should be true
#> [1] TRUE