Capture a token, or not
Create a token to capture or not.
- A character vector.
- Logical If
A character vector representing part or all of a regular expression.
or for more examples
x <- "foo" capture(x) group(x) # Usage # capture is good with match functions (rx_price <- capture(digit(1, Inf) %R% DOT %R% digit(2))) (rx_quantity <- capture(digit(1, Inf))) (rx_all <- DOLLAR %R% rx_price %R% " for " %R% rx_quantity) stringi::stri_match_first_regex("The price was $123.99 for 12.", rx_all) # group is mostly used with alternation. See ?or. (rx_spread <- group("peanut butter" %|% "jam" %|% "marmalade")) stringi::stri_extract_all_regex( "You can have peanut butter, jam, or marmalade on your toast.", rx_spread )
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