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unicorn/no-unnecessary-array-splice-count Pedantic

🛠️ An auto-fix is available for this rule.

What it does

Disallows passing .length or Infinity as the deleteCount or skipCount argument of Array#splice() or Array#toSpliced().

Why is this bad?

When calling Array#splice(start, deleteCount) or Array#toSpliced(start, skipCount), omitting the deleteCount or skipCount argument will delete or skip all elements after start. Using .length or Infinity is unnecessary and makes the code more verbose.

Examples

Examples of incorrect code for this rule:

array.splice(1, array.length);
array.splice(1, Infinity);
array.splice(1, Number.POSITIVE_INFINITY);
array.toSpliced(1, array.length);

Examples of correct code for this rule:

array.splice(1);
array.toSpliced(1);

How to use

To enable this rule using the config file or in the CLI, you can use:

Config (.oxlintrc.json)

{
  "rules": {
    "unicorn/no-unnecessary-array-splice-count": "error"
  }
}

Config (oxlint.config.ts)

import { defineConfig } from "oxlint";

export default defineConfig({
  rules: {
    "unicorn/no-unnecessary-array-splice-count": "error",
  },
});

CLI

oxlint --deny unicorn/no-unnecessary-array-splice-count

Version

This rule was added in v1.20.0.

References

• Rule Source
• Upstream rule docs
• Open rule in Oxc Playground