109 lines
2.2 KiB
Dart
109 lines
2.2 KiB
Dart
//объект, представляющий себя как уникальный экземпляр
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//в разных местах программы, по факту не является таковым.
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import "dart:collection";
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class Letter {
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late String letter;
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Letter(String l) {
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if (l.length != 1) { throw new Exception("Can only be a single letter"); }
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letter = l;
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}
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@override
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String toString() => letter;
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}
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class Sentence {
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List<Letter> letters = [];
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void addLetter(Letter letter) => letters.add(letter);
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@override
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String toString() => letters.join("");
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}
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class LetterFactory {
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Map<String, Letter> letters = {};
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Letter fetchLetter(String l) {
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if (letters.containsKey(l)) { return letters[l]!; }
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var letter = Letter(l);
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letters[l] = letter;
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return letter;
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}
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int get lettersCreated => letters.length;
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}
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class Document {
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LetterFactory letterFactory = LetterFactory();
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int lettersWritten = 0;
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late SplayTreeMap<int, Sentence> sentences;
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Document() {
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sentences = new SplayTreeMap<int, Sentence>();
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}
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void export() => sentences.forEach((k, v) => print("$v"));
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void write(int sentenceKey, String letterString) {
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if (!sentences.containsKey(sentenceKey)) {
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sentences[sentenceKey] = Sentence();
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}
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var l = letterFactory.fetchLetter(letterString);
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sentences[sentenceKey]!.addLetter(l);
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lettersWritten++;
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}
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int get lettersCreated => letterFactory.lettersCreated;
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}
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void main() {
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var doc = Document();
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doc.write(6, "t");
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doc.write(7, "u");
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doc.write(1, "A");
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doc.write(2, "y");
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doc.write(7, "s");
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doc.write(3, "b");
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doc.write(2, "o");
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doc.write(3, "a");
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doc.write(2, "u");
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doc.write(1, "l");
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doc.write(3, "s");
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doc.write(3, "e");
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doc.write(4, "a");
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doc.write(1, "l");
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doc.write(2, "r");
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doc.write(5, "b");
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doc.write(5, "e");
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doc.write(5, "l");
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doc.write(5, "o");
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doc.write(4, "r");
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doc.write(5, "n");
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doc.write(4, "e");
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doc.write(6, "o");
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doc.write(5, "g");
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doc.export();
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print("\r\nDocument wrote: ${doc.lettersWritten}.");
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print("Letters created: ${doc.lettersCreated}.");
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/*
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All
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your
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base
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are
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belong
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to
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us
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Document wrote: 24.
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Letters created: 13.
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*/
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}
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