fold()

const fold: <A, B>(onNone, onSome) => (ma) => B = match

Alias for match.

Pattern matches on an Option.

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Type Parameters

A: A

The value type.

B: B

The return type.

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Parameters

onNone: () => B

Handler for None case.

onSome: (a) => B

Handler for Some case.

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Returns

A function that matches the Option.

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Since

2.0.0