v0.4.0

v0.4.0 2017-11-11

Changed

• The Either monad was renamed to Result which sounds less nerdy but better reflects the purpose of the type. Either::Right became Result::Success and Either::Left became Result::Failure. This change is backward-compatible overall but you will see the new names when using old Left and Right methods (citizen428)
• Consequently, Try::Success and Try::Failure were renamed to Try::Value and Try::Error (flash-gordon)

Added

• Try#or, works as Result#or (flash-gordon)
• Maybe#success? and Maybe#failure? (aliases for #some? and #none?) (flash-gordon)
• Either#flip inverts a Result value (flash-gordon)
• List#map called without a block returns an Enumerator object (flash-gordon)
• Right-biased monads (Maybe, Result, and Try) now implement the === operator which is used for equality checks in the case statement (flash-gordon)

    case value
    when Some(1..100)       then :ok
    when Some { |x| x < 0 } then :negative
    when Some(Integer)      then :invalid
    else raise TypeError
    end

Deprecated

• Direct accessing value on right-biased monads has been deprecated, use the value! method instead. value! will raise an exception if it is called on a Failure/None/Error instance (flash-gordon)

Compare v0.3.1...v0.4.0

v0.3.1

Fixed

• Fixed unexpected coercing to Hash on .bind call (flash-gordon)

Compare v0.3.1...v0.3.0

v0.3.0

Added

• Added Either#either that accepts two callbacks, runs the first if it is Right and the second otherwise (nkondratyev)
• Added #fmap2 and #fmap3 for mapping over nested structures like List Either and Either Some (flash-gordon)
• Added Try#value_or (dsounded)
• Added the List monad which acts as an immutable Array and plays nice with other monads. A common example is a list of Eithers (flash-gordon)
• #bind made to work with keyword arguments as extra parameters to the block (flash-gordon)
• Added List#traverse that "flips" the list with an embedded monad (flash-gordon + damncabbage)
• Added #tee for all right-biased monads (flash-gordon)

Compare v0.3.0...v0.2.1