Int is not a true 64 bit - other type needed

[rtmigo]

Int is not a true 64 bit - other type needed

[rtmigo]

Although the positive int values in Dart VM do not exceed 2^63-1, these variables are still true 64-bit integers.

If it were a C language, we would clarify that we are talking about 64-bit signed, not 64-bit unsigned. But these are not two fundamentally different things. In many cases, they are interchangeable and almost identical.

In a particular case, to pass a large unsigned number f78207dec08eba34 as a seed, you just need to use its signed counterpart -87df8213f7145cc. This number will fit into a regular int in Dart.

import 'package:fixnum/fixnum.dart';

void main() {
  // interpreting a large number constant as a regular int (aka 64-bit signed)
  int seed = Int64.parseHex('f78207dec08eba34').toInt();
  ...
}

[vemla-solutions]

Thanks, I've seen this fixnum library, but didn't realize that it actually can be used to convert to a standard "int" type instead of using their Int64.
It works fine, the issue can be closed.
Thank you for your help!