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並前往https://sites.google.com/site/dartlangexamples/api/dart-core/interfaces/comparable-hashable-pattern/string

String - Dart Examples - Google Sites

int indexof = s.indexOf("l", 1); print(indexof); // 2 }. Is Empty... void main() { String s = "Hello"; bool isempty = s.isEmpty(); print(isempty); // false }.

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