unicorn/no-array-reduce Restriction
What it does
Disallow Array#reduce() and Array#reduceRight().
Why is this bad?
Array#reduce() and Array#reduceRight() usually result in hard-to-read and less performant code. In almost every case, it can be replaced by .map, .filter, or a for-of loop.
It's only somewhat useful in the rare case of summing up numbers, which is allowed by default.
Examples
Examples of incorrect code for this rule:
javascript
array.reduce(reducer, initialValue);
array.reduceRight(reducer, initialValue);Configuration
This rule accepts a configuration object with the following properties:
allowSimpleOperations
type: boolean
default: true
When set to true, allows simple operations (like summing numbers) in reduce and reduceRight calls.
How to use
To enable this rule using the config file or in the CLI, you can use:
json
{
"rules": {
"unicorn/no-array-reduce": "error"
}
}ts
import { defineConfig } from "oxlint";
export default defineConfig({
rules: {
"unicorn/no-array-reduce": "error",
},
});bash
oxlint --deny unicorn/no-array-reduceVersion
This rule was added in v0.0.19.