R/wordlist.R

In corpus: Text Corpus Analysis

#  Copyright 2017 Patrick O. Perry.
#
#  Licensed under the Apache License, Version 2.0 (the "License");
#  you may not use this file except in compliance with the License.
#  You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
#  Unless required by applicable law or agreed to in writing, software
#  distributed under the License is distributed on an "AS IS" BASIS,
#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#  See the License for the specific language governing permissions and
#  limitations under the License.


abbreviations <- function(kind = "english")
{
    .Deprecated("abbreviations_en")
    with_rethrow({
        wordlist(kind, function(k) .Call(C_abbreviations, k))
    })
}


stopwords <- function(kind = "english")
{
    .Deprecated("stopwords_en")
    with_rethrow({
        wordlist(kind, function(k) .Call(C_stopwords, k))
    })
}


wordlist <- function(kind, call)
{
    kind <- as_kind(kind)

    words <- character()
    for (k in kind) {
        wk <- call(k)
        words <- c(words, wk)
    }

    if (length(words) == 0) {
        return(NULL)
    }

    words <- unique(sort(words, method = "radix"))
    words
}