> For AI agents: the complete documentation index is available at https://rslint.rs/llms.txt, the full documentation bundle is available at https://rslint.rs/llms-full.txt.

# no-unnecessary-array-splice-count

[Added in v0.9.3](https://github.com/web-infra-dev/rslint/releases/tag/v0.9.3)
## Configuration

| Preset                              | Configured Value |
| ----------------------------------- | ---------------- |
| ✅ unicornPlugin.configs.recommended | `"error"`        |


```ts title=rslint.config.ts
import { defineConfig, unicornPlugin } from '@rslint/core';

export default defineConfig([
  unicornPlugin.configs.recommended,
  {
    rules: {
      'unicorn/no-unnecessary-array-splice-count': 'error',
    },
  },
]);
```

## Rule Details

Remove a redundant `.length`, `Infinity`, or `Number.POSITIVE_INFINITY` count from a two-argument `splice` or `toSpliced` call.

Calls with additional insertion arguments are left unchanged. Receivers known not to be arrays are excluded; the receiver classification also accepts typed arrays, matching upstream.

Examples of **incorrect** code:

```javascript
array.splice(1, array.length);
```

Examples of **correct** code:

```javascript
array.splice(1);
```

## Options

This rule has no options. It is enabled at `error` severity in `unicornPlugin.configs.recommended`.

## Differences from upstream

Locally shadowed, disabled, or previously reassigned `Infinity` and `Number`
globals are not assumed to be built-ins. For `.length` rewrites, known
getter-backed receiver paths or a first argument that can change the receiver
are skipped. In checker-less source-only runs, member-chain receivers are also
left unchanged because the rule cannot prove that their properties are
getter-free. These guards avoid semantics-changing autofixes that Unicorn
v75.0.0 can still offer.

## Original Documentation

- [eslint-plugin-unicorn: no-unnecessary-array-splice-count](https://github.com/sindresorhus/eslint-plugin-unicorn/blob/v75.0.0/docs/rules/no-unnecessary-array-splice-count.md)
- [Source code](https://github.com/sindresorhus/eslint-plugin-unicorn/blob/v75.0.0/rules/no-unnecessary-array-splice-count.js)