sequenceVOptionM

Namespace: FsToolkit.ErrorHandling

Applies the monadic function id to each element in the input list, and returns the result as an option. If any element in the list is ValueNone, the entire result will be ValueNone.

Function Signature

'a voption list -> 'a list voption

Examples

Example 1

let myList =
    [
        ValueSome 123
        ValueSome 456
        ValueSome 789
    ]

List.sequenceVOptionM myList
// ValueSome [123; 456; 789]

Example 2

let myList =
    [
        ValueSome 123
        ValueNone
        ValueSome 789
    ]

List.sequenceVOptionM myList
// ValueNone