### Generate Multiple Keys Fractional Index TS

Source: https://github.com/rocicorp/fractional-indexing/blob/main/README.md

This function generates a specified number (`n`) of fractional index keys evenly spaced between two existing keys (`a` and `b`). It helps maintain shorter keys when inserting multiple items at once. An optional custom character set can be provided.

```ts
generateNKeysBetween(
  a: string | null | undefined, // start
  b: string | null | undefined, // end
  n: number // number of keys to generate evenly between start and end
  digits?: string | undefined = BASE_62_DIGITS // optional character encoding
): string[];
```

```ts
import { generateNKeysBetween } from 'fractional-indexing';

const first = generateNKeysBetween(null, null, 2); // ['a0', 'a1']

// Insert two keys after 2nd
generateNKeysBetween(first[1], null, 2); // ['a2', 'a3']

// Insert two keys before 1st
generateNKeysBetween(null, first[0], 2); // ['Zy', 'Zz']

// Insert two keys in between 1st and 2nd (midpoints)
generateNKeysBetween(second, third, 2); // ['a0G', 'a0V']
```

--------------------------------

### Generate Single Key Fractional Index TS

Source: https://github.com/rocicorp/fractional-indexing/blob/main/README.md

This function generates a single fractional index key located between two existing keys (`a` and `b`). It supports optional custom character sets for the keys. The function is useful for inserting a single item into an ordered sequence.

```ts
generateKeyBetween(
  a: string | null | undefined, // start
  b: string | null | undefined, // end
  digits?: string | undefined = BASE_62_DIGITS // optional character encoding
): string;
```

```ts
import { generateKeyBetween } from 'fractional-indexing';

const first = generateKeyBetween(null, null); // "a0"

// Insert after 1st
const second = generateKeyBetween(first, null); // "a1"

// Insert after 2nd
const third = generateKeyBetween(second, null); // "a2"

// Insert before 1st
const zeroth = generateKeyBetween(null, first); // "Zz"

// Insert in between 2nd and 3rd (midpoint)
const secondAndHalf = generateKeyBetween(second, third); // "a1V"
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.