dfp 0.3.0

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

[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.