dfp 0.4.0

A library for typed functional programming in Dart, inspired by Rust.

0.4.0 15.07.2024

Update min SDK version.

Migrate to sealed classes.

Refactor asyncTryCatch - use future callback instead of future object.

0.3.0 03.05.2022

Added new methods to Option and Result.

Option:

• flatMap - returns None or calls f with the wrapped value and returns Some(f(value));
• filter - returns None if the option is None or predicate returns false, otherwise returns Some.

Result:

• flatMap - calls f if the result is Ok, otherwise returns the Err value of self;
• flatMapErr - Calls f if the result is Err, otherwise returns the Ok value of self.

0.2.1 31.05.2022

Restricted the parameterized type E for tryCatch and asyncTryCatch.

Fixed typos in the README and expanded the description of Option class.

0.2.0 29.05.2022

Added new type Result that represents either success (Ok) or failure (Err).

A number of new methods have been added for Result and Option:

• ifSome, ifNone, ifSomeElse, when (Option) and ifOk, ifErr, ifOkElse, when for getting internal value using callbacks;
• static method flatten that converts from Option<Option<T>> to Option<T> and respectively Result<Result<T, E>, E> to Result<T, E>;
• static method transpose for both classes that transposes a Result of an Option into an Option of a Result (and vice versa);
• added tests for all methods (code coverage is 100%).

0.0.1 TODO: Add release date

• TODO: Describe initial release.