What does New do in Dart?

If you’re coming from many other object-oriented languages, you’ve probably seen the new keyword used to create new instances of a class . In Dart, this new keyword works the same way, but it isn’t necessary. In Dart 2, you don’t need to use new or const to create an object. The compiler will infer that for you.

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What is pub upgrade?

Upgrade is one of the commands of the pub tool . $ dart pub upgrade [options] [dependencies] Like dart pub get , dart pub upgrade gets dependencies. The difference is that dart pub upgrade ignores any existing lockfile, so that pub can get the latest versions of all dependencies.

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