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(v1.3.0.9014) as.mo() speed improvement

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dr. M.S. (Matthijs) Berends
2020-09-03 12:31:48 +02:00
parent 18e52f2725
commit c4b87fe241
93 changed files with 739 additions and 609 deletions
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29
R/like.R
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@ -32,14 +32,14 @@
#' @export
#' @details
#' The `%like%` function:
#' * Is case insensitive (use `%like_case%` for case-sensitive matching)
#' * 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
#' * Tries again with `perl = TRUE` if regex fails
#'
#' Using RStudio? This function can also be inserted 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/master/R/like.R)
#' @seealso [base::grep()]
#' @seealso [grep()]
#' @inheritSection AMR Read more on our website!
#' @examples
#' # simple test
@ -71,13 +71,25 @@ like <- function(x, pattern, ignore.case = TRUE) {
pattern <- tolower(pattern)
}
if (length(pattern) > 1 & length(x) == 1) {
x <- rep(x, length(pattern))
}
if (length(pattern) > 1) {
res <- vector(length = length(pattern))
if (length(x) != length(pattern)) {
if (length(x) == 1) {
x <- rep(x, length(pattern))
}
# return TRUE for every 'x' that matches any 'pattern', FALSE otherwise
res <- sapply(pattern, function(pttrn) base::grepl(pttrn, x, ignore.case = FALSE, fixed = fixed))
for (i in seq_len(length(res))) {
if (is.factor(x[i])) {
res[i] <- as.integer(x[i]) %in% grep(pattern[i], levels(x[i]), ignore.case = FALSE, fixed = fixed)
} else {
res[i] <- grepl(pattern[i], x[i], ignore.case = FALSE, fixed = fixed)
}
}
res <- sapply(pattern, function(pttrn) grepl(pttrn, x, ignore.case = FALSE, fixed = fixed))
res2 <- as.logical(rowSums(res))
# get only first item of every hit in pattern
res2[duplicated(res)] <- FALSE
@ -85,12 +97,11 @@ like <- function(x, pattern, ignore.case = TRUE) {
return(res2)
} else {
# x and pattern are of same length, so items with each other
res <- vector(length = length(pattern))
for (i in seq_len(length(res))) {
if (is.factor(x[i])) {
res[i] <- as.integer(x[i]) %in% base::grep(pattern[i], levels(x[i]), ignore.case = FALSE, fixed = fixed)
res[i] <- as.integer(x[i]) %in% grep(pattern[i], levels(x[i]), ignore.case = FALSE, fixed = fixed)
} else {
res[i] <- base::grepl(pattern[i], x[i], ignore.case = FALSE, fixed = fixed)
res[i] <- grepl(pattern[i], x[i], ignore.case = FALSE, fixed = fixed)
}
}
return(res)
@ -99,13 +110,13 @@ like <- function(x, pattern, ignore.case = TRUE) {
# the regular way how grepl works; just one pattern against one or more x
if (is.factor(x)) {
as.integer(x) %in% base::grep(pattern, levels(x), ignore.case = FALSE, fixed = fixed)
as.integer(x) %in% grep(pattern, levels(x), ignore.case = FALSE, fixed = fixed)
} else {
tryCatch(base::grepl(pattern, x, ignore.case = FALSE, fixed = fixed),
tryCatch(grepl(pattern, x, ignore.case = FALSE, fixed = fixed),
error = function(e) {
if (grepl("invalid reg(ular )?exp", e$message, ignore.case = TRUE)) {
# try with perl = TRUE:
return(base::grepl(pattern = pattern,
return(grepl(pattern = pattern,
x = x,
ignore.case = FALSE,
fixed = fixed,