head
head<
S,A>(self):transform<S,OptionFromSelf<SchemaClass<A[number],A[number],never>>>
Defined in: node_modules/.pnpm/effect@3.15.2/node_modules/effect/dist/dts/Schema.d.ts:3429
Get the first element of a ReadonlyArray, or None if the array is empty.
Type Parameters
Section titled “Type Parameters”S extends Any
A extends readonly unknown[]
Parameters
Section titled “Parameters”S & Schema<A, Encoded<S>, Context<S>>
Returns
Section titled “Returns”transform<S, OptionFromSelf<SchemaClass<A[number], A[number], never>>>
3.10.0