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print("hello world!");
print(Directory.current);
print(Directory.systemTemp);
// var ex= new File('file.txt').readAsStringSync();
// print(ex);
String a ="第三方似懂非懂司法所";
print(a.split("似懂"));
print(a);
print(a.substring(0,3));
print(a.codeUnitAt(0));
print(String.fromCharCode(31532));
print(a[0]);
print(a.indexOf('pattern'));
print(a.indexOf('第'));
print(a.contains('other'));
print(a.length);
print(a.lastIndexOf('所'));
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