Nothing
.verifyChar <- function(vec) {
if (!is.atomic(vec)) stop("Must be an atomic vector!", call. = FALSE)
OUT <- as.character(vec)
return(OUT)
}
.verifyNum <- function(vec) {
if (!is.atomic(vec)) stop("Must be an atomic vector!")
OUT <- suppressWarnings(as.numeric(vec))
if (length(OUT[!is.na(OUT)]) == 0) stop("Does not contain any numeric elements!", call. = FALSE)
return(OUT)
}
.verifyEnv <- function() {
if (!exists(".tmcnEnv", envir = .GlobalEnv)) {
envir0 = as.environment(1)
assign(".tmcnEnv", new.env(), envir = envir0)
}
OUT <- get(".tmcnEnv", envir = .GlobalEnv)
return(OUT)
}
.getStopWords <- function() {
.tmcnEnv <- .verifyEnv()
utils::data(STOPWORDS, envir = .tmcnEnv)
STOPWORDS <- get("STOPWORDS", envir = .tmcnEnv)
return(STOPWORDS)
}
.strsplit_space_tokenizer <- function(x) {
unlist(strsplit(as.character(x), "[[:space:]]+"))
}
.createHashmapEnv <- function(key, value)
{
key <- .verifyChar(key)
value <- .verifyChar(value)
if (length(key) != length(value)) stop("Length of 'key' and 'value' are not same!")
e <- new.env(hash = TRUE, size = length(key))
for (ikey in 1:length(key)) {
assign(x = key[ikey], value = value[ikey], envir = e)
}
return(e)
}
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