Function __sum

src/modules/lda/lda.cpp:150–154

* @brief Get the sum of an array - for parameter checking * @return The sum * @note The caller will ensure that ah is always non-null. **/

 * @note The caller will ensure that ah is always non-null.
 **/
static int32_t __sum(ArrayHandle<int32_t> ah){
    const int32_t * array = ah.ptr();
    size_t size = ah.size();
    return std::accumulate(array, array + size, static_cast<int32_t>(0));
}

/**
 * @brief This function learns the topics of words in a document and is the