Array

Array instance

array/is

Confirms if given object is a native array

const isArray = require("type/array/is");

isArray([]); // true
isArray({}); // false
isArray("foo"); // false

array/ensure

If given argument is an array, it is returned back. Otherwise TypeError is thrown.

const ensureArray = require("type/array/ensure");

ensureArray(["foo"]); // ["foo"]
ensureArray("foo"); // Thrown TypeError: foo is not an array

Confirming on items

Items can be validated by passing ensureItem option. Note that in this case:

• A newly created instance of an array with coerced item values is returned
• Error message lists up to three items which are invalid

const ensureString = require("type/string/ensure");

ensureArray([12], { ensureItem: ensureString }); // ["12"]

/*
 Below invocation with crash with:
 TypeError: 23, [object Object], [object Object] is not a valid array.
            Following items are invalid: [object Object], [object Object]
*/
ensureArray([23, {}, {}], { ensureItem: ensureString });