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(v1.6.0.9003) like() fix

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dr. M.S. (Matthijs) Berends
2021-04-16 11:41:05 +02:00
parent d277d58475
commit 00d3e437a8
29 changed files with 78 additions and 62 deletions
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21
R/like.R
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@ -28,21 +28,21 @@
#' Convenient wrapper around [grepl()] to match a pattern: `x %like% pattern`. It always returns a [`logical`] vector and is always case-insensitive (use `x %like_case% pattern` for case-sensitive matching). Also, `pattern` can be as long as `x` to compare items of each index in both vectors, or they both can have the same length to iterate over all cases.
#' @inheritSection lifecycle Stable Lifecycle
#' @param x a character vector where matches are sought, or an object which can be coerced by [as.character()] to a character vector.
#' @param pattern a character string containing a regular expression (or [character] string for `fixed = TRUE`) to be matched in the given character vector. Coerced by [as.character()] to a character string if possible. If a [character] vector of length 2 or more is supplied, the first element is used with a warning.
#' @param pattern a character vector containing regular expressions (or a [character] string for `fixed = TRUE`) to be matched in the given character vector. Coerced by [as.character()] to a character string if possible.
#' @param ignore.case if `FALSE`, the pattern matching is *case sensitive* and if `TRUE`, case is ignored during matching.
#' @return A [logical] vector
#' @name like
#' @rdname like
#' @export
#' @details
#' The `%like%` function:
#' This `%like%` function:
#' * Is case-insensitive (use `%like_case%` for case-sensitive matching)
#' * Supports multiple patterns
#' * Checks if `pattern` is a regular expression and sets `fixed = TRUE` if not, to greatly improve speed
#' * Checks if `pattern` is a valid regular expression and sets `fixed = TRUE` if not, to greatly improve speed (vectorised over `pattern`)
#' * Always uses compatibility with Perl unless `fixed = TRUE`, to greatly improve speed
#'
#' Using RStudio? The text `%like%` can also be directly inserted in your code from the Addins menu and can have its own Keyboard Shortcut like `Ctrl+Shift+L` or `Cmd+Shift+L` (see `Tools` > `Modify Keyboard Shortcuts...`).
#' @source Idea from the [`like` function from the `data.table` package](https://github.com/Rdatatable/data.table/blob/ec1259af1bf13fc0c96a1d3f9e84d55d8106a9a4/R/like.R)
#' @source Idea from the [`like` function from the `data.table` package](https://github.com/Rdatatable/data.table/blob/ec1259af1bf13fc0c96a1d3f9e84d55d8106a9a4/R/like.R), although altered as explained in *Details*.
#' @seealso [grepl()]
#' @inheritSection AMR Read more on Our Website!
#' @examples
@ -79,9 +79,10 @@ like <- function(x, pattern, ignore.case = TRUE) {
if (all(is.na(x))) {
return(rep(FALSE, length(x)))
}
# set to fixed if no regex found
fixed <- !any(is_possibly_regex(pattern))
# set to fixed if no valid regex (vectorised)
fixed <- !is_valid_regex(pattern)
if (ignore.case == TRUE) {
# set here, otherwise if fixed = TRUE, this warning will be thrown: argument `ignore.case = TRUE` will be ignored
x <- tolower(x)
@ -91,7 +92,7 @@ like <- function(x, pattern, ignore.case = TRUE) {
if (is.factor(x)) {
x <- as.character(x)
}
if (length(pattern) == 1) {
grepl(pattern, x, ignore.case = FALSE, fixed = fixed, perl = !fixed)
} else {
@ -105,7 +106,9 @@ like <- function(x, pattern, ignore.case = TRUE) {
mapply(FUN = grepl,
x = x,
pattern = pattern,
MoreArgs = list(ignore.case = FALSE, fixed = fixed, perl = !fixed),
fixed = fixed,
perl = !fixed,
MoreArgs = list(ignore.case = FALSE),
SIMPLIFY = FALSE,
USE.NAMES = FALSE)
)