private createFlashcards(){
        let flashcards: Flashcard[];
        let i: number;
        let word1 = this.wordsW;
        let word2 = this.translatedWords;
        let example1 = this.sentence;
        let example2 = this.translatedSentence;


        for (let entry of this.wordsW) {
            let flashcard: Flashcard = {
                id: 3,
                words1: word1[i],
                words2: word2[i],
                example1: example1[i],
                example2: example2[i]
            }
            i++;
            ->>> flashcards.push(flashcard);
        }
        return flashcards;
    }