Jisho-Study-Tool/lib/services/kanji_suggestions.dart

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final kanjiPattern = RegExp(r'[\u3400-\u4DB5\u4E00-\u9FCB\uF900-\uFA6A]');
List<String> kanjiSuggestions(String string) {
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return kanjiPattern
.allMatches(string)
.map((match) => match.group(0))
.where((element) => element != null)
.map((element) => element!)
.toList();
}