Function last

last<const Ar extends readonly unknown[]>(
    array: Ar,
): Ar extends readonly []
    ? Readonly<{}>
    : Ar extends readonly [unknown, E]
        ? Readonly<{}>
        : Ar extends readonly [E, E] ? Readonly<{}> : Optional<Ar[number]>
Returns the last element of an array as an Optional.
Type Parameters
- const Ar extends readonly unknown[]
Parameters
- array: Ar
Returns Ar extends readonly []
    ? Readonly<{}>
    : Ar extends readonly [unknown, E]
        ? Readonly<{}>
        : Ar extends readonly [E, E] ? Readonly<{}> : Optional<Ar[number]>
Example
```
const queue = ['first', 'second'];

const emptyQueue: string[] = [];

const lastValue = Arr.last(queue);

const none = Arr.last(emptyQueue);

assert.deepStrictEqual(lastValue, Optional.some('second'));

assert.deepStrictEqual(none, Optional.none);
```
- Defined in src/array/impl/array-utils-element-access.mts:111