[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Order](https://evolu.dev/docs/api-reference/common/Order) › createOrder

```ts
function createOrder<A>(isLessThan: (x: A, y: A) => boolean): Order<A>;
```

Defined in: [packages/common/src/Order.ts:45](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Order.ts#L45)

Creates an ordering function from a "less than" comparator.

### Example

```ts

const orderNumber = createOrder<number>((x, y) => x < y);
assertEqual(orderNumber(1, 2), -1);
assertEqual(orderNumber(2, 1), 1);
assertEqual(orderNumber(1, 1), 0);
```