You don't have to modify, and I never do except to improve readability (read: eliminate or reduce horizontal scrollbars). It's not unusual to see a good contrib

You don't have to modify, and I never do except to improve readability (read: eliminate or reduce horizontal scrollbars). It's not unusual to see a good contributor add an answer to an old question that uses newer syntax or version features. "The accepted answer is quite old but this question is the top result for 'javascript arrays' (e.g.), so this is how you do it in ES6."