Interface Either<L, R>

Returns the first Right between this and another Either or the Left in the argument if both this and the argument are Left

Lazy version of alt

Applies a Right function over a Right value. Returns Left if either this or the function are Left

Given two functions, maps the value inside this using the first if this is Left or using the second one if this is Right. If both functions return the same type consider using Either#either instead

Structural pattern matching for Either in the form of a function

Transforms this with a function that returns an Either. Useful for chaining many computations that may fail

The same as Either#chain but executes the transformation function only if the value is Left. Useful for recovering from errors

Compares this to another Either, returns false if the constructors or the values inside are different, e.g. Right(5).equals(Left(5)) is false

Returns this if it's a Left, otherwise it returns the result of applying the function argument to this and wrapping it in a Right

Extracts the value out of this

Runs an effect if this is Left, returns this to make chaining other methods possible

Runs an effect if this is Right, returns this to make chaining other methods possible

Returns true if this is Left, otherwise it returns false

Returns true if this is Right, otherwise it returns false

Flattens nested Eithers. e.join() is equivalent to e.chain(x => x)

Returns the value inside this if it's Left or a default value if this is Right

Lazy version of leftOrDefault. Takes a function that returns the default value, that function will be called only if this is Right

Constructs a Just with the value of this if it's Left or a Nothing if this is Right

Maps the Right value of this, acts like an identity if this is Left

Maps the Left value of this, acts like an identity if this is Right

Returns the value inside this if it's Right or a default value if this is Left

Lazy version of orDefault. Takes a function that returns the default value, that function will be called only if this is Left

Takes a reducer and an initial value and returns the initial value if this is Left or the result of applying the function to the initial value and the value inside this

Returns Right if this is Left and vice versa

Constructs a Just with the value of this if it's Right or a Nothing if this is Left

Returns the value inside this if it's a Right or either throws the value or a generic exception depending on whether the value is an Error