R/rm_emoticon.R

In qdapRegex: Regular Expression Removal, Extraction, and Replacement Tools

#' Remove/Replace/Extract Emoticons 
#' 
#' Remove/replace/extract common emoticons from a string.
#' 
#' @param text.var The text variable.
#' @param trim logical.  If \code{TRUE} removes leading and trailing white 
#' spaces.
#' @param clean trim logical.  If \code{TRUE} extra white spaces and escaped 
#' character will be removed.
#' @param pattern A character string containing a regular expression (or 
#' character string for \code{fixed = TRUE}) to be matched in the given 
#' character vector.  Default, \code{@@rm_emoticon} uses the 
#' \code{rm_emoticon} regex from the regular expression dictionary from 
#' the \code{dictionary} argument.
#' @param replacement Replacement for matched \code{pattern}.
#' @param extract logical.  If \code{TRUE} the emoticons are extracted into a 
#' list of vectors.
#' @param dictionary A dictionary of canned regular expressions to search within 
#' if \code{pattern} begins with \code{"@@rm_"}.
#' @param \dots Other arguments passed to \code{\link[base]{gsub}}.
#' @return Returns a character string with emoticons removed.
#' @keywords emoticon digispeak
#' @family rm_ functions
#' @include utils.R
#' @export
#' @rdname rm_emoticon
#' @seealso \code{\link[base]{gsub}},
#' \code{\link[stringi]{stri_extract_all_regex}}
#' @examples
#' x <- c("are :-)) it 8-D he XD on =-D they :D of :-) is :> for :o) that :-/",
#'   "as :-D I xD with :^) a =D to =) the 8D and :3 in =3 you 8) his B^D was")
#' 
#' rm_emoticon(x)
#' ex_emoticon(x)
rm_emoticon <- hijack(rm_default, pattern = "@rm_emoticon") 

#' @export
#' @rdname rm_emoticon
ex_emoticon <- hijack(rm_emoticon, extract=TRUE)