How to use get left object from Either?

[ahuruFoundation]

Hi, Im quite new to darz. Is there a way to just get the left object of Either?

For example, Im returning Either<Failure, Type> from a method. final result = method(); if (result.isLeft()) { //doesn't seem like there is a result.getLeft }

thanks.

[spebbe]

Hi @ahuruFoundation !

The main purpose of Either is to make it impossible to forget to handle failures, by using fold or getOrElse, which ensures that failures are either handled or recovered. However, if you really need to, you can do this:

    if (result is Left<Failure, Type>) {
      print(result.value); // ...or whatever you want to do. Don't forget to handle Right values as well ;-)
    }

This mechanism is considered an escape hatch though and risks defeating the purpose of using Either in the first place.

Hope that helped!

[ahuruFoundation]

thanks, that really helps.

[fullflash]

there is no value in dartz package

result.value