headOrElse

Retrieves the first element of a ReadonlyArray.

If the array is empty, it returns the fallback argument if provided; otherwise, it fails.

Since

3.10.0

Call Signature

headOrElse<S, A>(fallback?): (self) => transform<S, SchemaClass<A[number], A[number], never>>

Defined in: node_modules/.pnpm/effect@3.14.8/node_modules/effect/dist/dts/Schema.d.ts:3454

Retrieves the first element of a ReadonlyArray.

If the array is empty, it returns the fallback argument if provided; otherwise, it fails.

Type Parameters

• S extends Any

• A extends readonly unknown[]

Parameters

fallback?

LazyArg<A[number]>

Returns

Function

Parameters

self

S & Schema<A, Encoded<S>, Context<S>>

Returns

transform<S, SchemaClass<A[number], A[number], never>>

Since

3.10.0

Since

3.10.0

Call Signature

headOrElse<S, A>(self, fallback?): transform<S, SchemaClass<A[number], A[number], never>>

Defined in: node_modules/.pnpm/effect@3.14.8/node_modules/effect/dist/dts/Schema.d.ts:3463

Retrieves the first element of a ReadonlyArray.

If the array is empty, it returns the fallback argument if provided; otherwise, it fails.

Type Parameters

• S extends Any

• A extends readonly unknown[]

Parameters

self

S & Schema<A, Encoded<S>, Context<S>>

fallback?

LazyArg<A[number]>

Returns

transform<S, SchemaClass<A[number], A[number], never>>

Since

3.10.0

Since

3.10.0