| definition: |
listToMaybe :: [a] -> Maybe a listToMaybe [] = Nothing listToMaybe (a : _) = Just a |
| demand: |
argument 1 |
| deterministic: |
deterministic operation |
| documentation: |
--- Return `Nothing` on an empty list or `Just x` where `x` is the first --- list element. |
| failfree: |
_ |
| indeterministic: |
referentially transparent operation |
| infix: |
no fixity defined |
| iotype: |
{({[]}) |-> {Nothing} || ({:}) |-> {Just}}
|
| name: |
listToMaybe |
| precedence: |
no precedence defined |
| result-values: |
{Just,Nothing}
|
| signature: |
[a] -> Prelude.Maybe a |
| solution-complete: |
operationally complete operation |
| terminating: |
yes |
| totally-defined: |
reducible on all ground data terms |