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pipelined

mapFirst

mapFirst<A, C>(f): <B>(tuple) => Tuple<C, B>

Defined in: Core/Tuple.ts:64

Transforms the first value, leaving the second unchanged.

Type Parameters

Section titled “Type Parameters”

A

Section titled “A”

A

C

Section titled “C”

C

Parameters

Section titled “Parameters”

f

Section titled “f”

(a) => C

Returns

Section titled “Returns”

<B>(tuple): Tuple<C, B>

Type Parameters

Section titled “Type Parameters”

B

Section titled “B”

B

Parameters

Section titled “Parameters”

tuple

Section titled “tuple”

Tuple<A, B>

Returns

Section titled “Returns”

Tuple<C, B>

Example

Section titled “Example”
pipe(Tuple.make("alice", 42), Tuple.mapFirst((s) => s.toUpperCase())); // ["ALICE", 42]