Other Functions

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Other Functions
requireTrue
Returns the specified error if the task-wrapped value is false.
'a -> Task<bool> -> Task<Result<unit, 'a>>`
requireFalse
Returns the specified error if the task-wrapped value is true.
'a -> Task<bool> -> Task<Result<unit, 'a>>`
requireSome
Converts an task-wrapped Option to a Result, using the given error if None.
'a -> Task<'b option> -> Task<Result<'b, 'a>>`
requireNone
Converts an task-wrapped Option to a Result, using the given error if Some.
'a -> Task<'b option> -> Task<Result<unit, 'a>>`
requireEqual
Returns Ok if the task-wrapped value and the provided value are equal, or the specified error if not. Same as requireEqualTo, but with a parameter order that fits normal function application better than piping.
'a -> Task<'a> -> 'b -> Task<Result<unit, 'b>>
requireEqualTo
Returns Ok if the task-wrapped value and the provided value are equal, or the specified error if not. Same as requireEqual, but with a parameter order that fits piping better than normal function application.
'a -> 'b -> Task<'a> -> Task<Result<unit, 'b>>
requireEmpty
Returns Ok if the task-wrapped sequence is empty, or the specified error if not.
'a -> Task<'b> -> Task<Result<unit, 'a>>
requireNotEmpty
Returns Ok if the task-wrapped sequence is non-empty, or the specified error if not.
'a -> Task<'b> -> Task<Result<unit, 'a>>
requireHead
Returns the first item of the sequence if it exists, or the specified error if the sequence is empty
'a -> Task<'b> -> Task<Result<'c, 'a>>
setError
Replaces an error value of an task-wrapped result with a custom error value
'a -> Task<Result<'b, 'c>> -> Task<Result<'b, 'a>>
withError
Replaces a unit error value of an task-wrapped result with a custom error value. Safer than setError since you're not losing any information.
'a -> Task<Result<'b, unit>> -> Task<Result<'b, 'a>>
defaultValue
Extracts the contained value of an task-wrapped result if Ok, otherwise uses the provided value.
'a -> Task<Result<'a, 'b>> -> Task<'a>
defaultWith
Extracts the contained value of an task-wrapped result if Ok, otherwise evaluates the given function and uses the result.
(unit -> 'a) -> Task<Result<'a, 'b>> -> Task<'a>
ignoreError
Same as defaultValue for a result where the Ok value is unit. The name describes better what is actually happening in this case.
Task<Result<unit, 'a>> -> Task<unit>
tee
If the task-wrapped result is Ok, executes the function on the Ok value. Passes through the input value unchanged.
('a -> unit) -> Task<Result<'a, 'b>> -> Task<Result<'a, 'b>>
teeError
If the task-wrapped result is Error, executes the function on the Error value. Passes through the input value unchanged.
('a -> unit) -> Task<Result<'b, 'a>> -> Task<Result<'b, 'a>>
teeIf
If the task-wrapped result is Ok and the predicate returns true for the wrapped value, executes the function on the Ok value. Passes through the input value unchanged.
('a -> bool) -> ('a -> unit) -> Task<Result<'a, 'b>> -> Task<Result<'a, 'b>>
teeErrorIf
If the task-wrapped result is Error and the predicate returns true for the wrapped value, executes the function on the Error value. Passes through the input value unchanged.
('a -> bool) -> ('a -> unit) -> Task<Result<'b, 'a>> -> Task<Result<'b, 'a>>
sequenceTask
Converts a Result<Task<'a>, 'b> to Task<Result<'a, 'b>>.
Result<Task<'a>, 'b> -> Task<Result<'a, 'b>>