Is the difference between them is just syntax or there’s a performance issue? Both, and more… Rest parameters: Are a known idiom in other languages (Ruby, Python). Are esier to read and maintain (vs. slice). Are easier to understand for beginners. Can (and likely will) result in better performance, since engines can optimize. Are tool … Read more
With respect to (…args) =>, …args is a rest parameter. It always has to be the last entry in the parameter list and it will be assigned an array that contains all arguments that haven’t been assigned to previous parameters. It’s basically the replacement for the arguments object. Instead of writing function max() { var … Read more
When using spread, you are expanding a single variable into more: var abc = [‘a’, ‘b’, ‘c’]; var def = [‘d’, ‘e’, ‘f’]; var alpha = [ …abc, …def ]; console.log(alpha)// alpha == [‘a’, ‘b’, ‘c’, ‘d’, ‘e’, ‘f’]; When using rest arguments, you are collapsing all remaining arguments of a function into one array: … Read more