Eliminate the eslint@typescript-eslint/no-unused-vars error in TypeScript when the index parameter is not utilized within a map function

Here's the code snippet in question:

const reducer = (element:number, index: number) => [element]; //eslint-message.
const positionsArray = $.map(this.positions, reducer);

I am converting a Float32Array (this.positions) to a JavaScript array. The issue I encounter is: 'index' is defined but never used.eslint@typescript-eslint/no-unused-vars

I am hesitant about using "// eslint-disable-line no-unused-vars" as a solution.

Is there a way to resolve this error for cases where the index is not needed? I tried using reduce and accessing the accumulator without success. Thank you.

EDIT: If I remove the definition of index, I encounter this error: https://i.sstatic.net/pijDm.png

typescripteslintmap-function

Answer №1

It is not necessary to define every parameter. TypeScript and JavaScript do not require you to use all possible parameters in a callback function.

To convert a typed array to a normal array, you can simply iterate over it instead of using jQuery's .map method, which may not work as expected:

const positionsArray = [...this.positions].map(element => [element]);

If you just need a plain array from the typed array, you can skip using .map and directly iterate over the array:

const positionsArray = [...this.positions];

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