30-seconds-of-code/snippets/array-concatenation.md

Array concatenation

Use Array.concat() to concatenate and array with any additional arrays and/or values, specified in args.

const arrayConcat = (arr, ...args) => arr.concat(...args);
// arrayConcat([1], [1, 2, 3, [4]]) -> [1, 1, 2, 3, [4]]