# SomeExtend

`type` in `services` · v0.7.1

<https://docs.seedcord.org/packages/services/0.7.1/types/some-extend-2>

Returns a boolean for whether some element in an array type extends another type.

## Examples

```ts
import type {SomeExtend} from 'type-fest';

type A = SomeExtend<['1', '2', 3], number>;
//=> true

type B = SomeExtend<[1, 2, 3], string>;
//=> false

type C = SomeExtend<[string, number | string], number>;
//=> boolean

type D = SomeExtend<[true, boolean, true], false>;
//=> boolean

Note: Behaviour of optional elements depend on the exactOptionalPropertyTypes compiler option. When the option is disabled, the target type must include undefined for a successful match.

// @exactOptionalPropertyTypes: true
import type {SomeExtend} from 'type-fest';

type A = SomeExtend<[1?, 2?, '3'?], string>;
//=> true

// @exactOptionalPropertyTypes: false
import type {SomeExtend} from 'type-fest';

type A = SomeExtend<[1?, 2?, '3'?], string>;
//=> boolean

type B = SomeExtend<[1?, 2?, '3'?], string | undefined>;
//=> true
```

## Declaration

```ts
type SomeExtend<
    TArray extends UnknownArray,
    Type,
    Options extends SomeExtendOptions = {}
> = _SomeExtend<
    CollapseRestElement<TArray>,
    Type,
    ApplyDefaultOptions<SomeExtendOptions, DefaultSomeExtendOptions, Options>
>;
```

## See also

- SomeExtendOptions
- Utilities   Array