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並前往https://flutterhq.com/questions-and-answers/2173/dart-the-type-int-used-in-the-for-loop-must-implement-iterable

Dart, the type int used in the for loop must implement iterable

I want to use Dart for…in loop in this function but I keep facing this error even though I declared the arr as an Iterable<int>. function:

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