args-to-arr

Converts arguments or any other array-like object into an array starting from specific index.

Inspired by how Typescript handles ...rest arguments.

Install

npm i args-to-arr

CDN

jsDelivr

<script src="https://cdn.jsdelivr.net/npm/args-to-arr@latest/dist/args-to-arr.umd.js"></script>

for production

<script src="https://cdn.jsdelivr.net/npm/args-to-arr@latest/dist/args-to-arr.umd.min.js"></script>

more options...

unpkg

<script src="https://unpkg.com/args-to-arr@latest/dist/args-to-arr.umd.js"></script>

for production

<script src="https://unpkg.com/args-to-arr@latest/dist/args-to-arr.umd.min.js"></script>

more options...

Usage

Node.js

const toArray = require("args-to-arr");
const array = toArray(arrayLike, start);

Browser

After adding the script tag, toArray function will be available globally.

const array = toArray(arrayLike, start);

Reference

example

import toArray from "args-to-arr";
 
function anything(firstArg) {
 
  // convert arguments to array
  // starting from argument 1
  // it won't include firstArg
  const args = toArray(arguments, 1);
 
  // do something with the array
 
}

syntax

toArray<T>(arr: ArrayLike<T>, start: number = 0): T[];

return

type: Array

It returns a new array based on the provided parameters.

arr

type: Array | ArrayLike

Array or Array-like object to be converted to a new array.

start

type: number default: 0

Index number for array convertion to start from. If not provided or it equals null or undefined it will default to 0.

Providing a negative start index will cause the function to start iterating X items from the end of the array, see the following example.

example

const array = toArray([1, 2, 3, 4], -2);
console.log(array);

[ 3, 4 ]

If the provided negative start index exceeds the size of the array, it will fill the begining of the resulting array with empty values.

example

const array = toArray([1, 2], -4);
console.log(array);

[ <2 empty items>, 1, 2 ]

License

MIT © Manuel Fernández