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- void main() {
- Either<String,double> safeDivision(int a, int b) => (b==0) ? Left("Invalid") : Right(a/b);
- final Either<String,double> a = safeDivision(2, 0); // Left("Invalid)
- final Either<String,double> b = safeDivision(4, 2); // Right(2)
- }
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