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| type UpperCaseHead = (list: ReadonlyArray<string>) => Maybe<string> | |
| const upperCaseHead: UpperCaseHead = compose( | |
| Maybe.map(toUpper), | |
| safeHead, | |
| ) as UpperCaseHead | |
| console.log(upperCaseHead([])) // { type: Maybe.Nothing } ie. Nothing | |
| console.log(upperCaseHead([ 'rick', 'morty' ])) // { type: Maybe.Just, value: 'RICK' } ie. Just 'RICK' |
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