## PatchOptions.implicitArrayCreation property [​](/content/docs/sdk/core.patchoptions.implicitarraycreation#patchoptionsimplicitarraycreation-property/index.html)

When true, "add" operations with path ending in "/-" will implicitly create an empty array where possible.

For example, with this option enabled, for the object `{live: true}`, the operation `add "/tag/-" 123` will result in `{live: true, tag: [123]}`. Subsequent operations behave normally: another `add "/tag/-" 456` will result in `{live: true, tag: [123, 456]}`.

If the indicated array property already exists but is not an array, this will produce an error.

Only the leaf array will be inferred; missing parent objects will still produce errors.

**Signature:**

```typescript
implicitArrayCreation?: boolean;
```

- [PatchOptions.implicitArrayCreation property](/content/docs/sdk/core.patchoptions.implicitarraycreation#patchoptionsimplicitarraycreation-property/index.html)