just clear that me don't understanding whith '$' maybe it names like reduce it for me.

Nope, unfortunately. So you know what to do ;-)

Isn't -1 the way of targeting the last element of the array in JS?

Why are you using -1 in JS? ;-)

This solution is not best practice, returning a boolean from a ternary operator is a waste of characters and known as antipattern

Thank you for your solution! Is it run?

Count how many { you have there and how many }.
Delete the calls to your function (you don't need them) and don't use console.log inside the function, use return instead.

Write a function that takes the animal's name and dish as arguments and returns true or false to indicate whether the beast is allowed to bring the dish to the feast.

And your code is? Mark your post as having spoiler content and check how to use code markdown

Hi. Really I did it task (using JavaScript) in browser, but here I get
this error:
"

});
^

SyntaxError: Unexpected token )
at createScript (vm.js:74:10)
at Object.runInThisContext (vm.js:116:10)
at Object. (eval-wrapper:6:22)
at
at evalScript (bootstrap_node.js:432:27)
at startup (bootstrap_node.js:139:9)
at bootstrap_node.js:575:3"

What is wrong?

Cederwars.com don't accept my solution..(

I tried to use "Set" but it seems something causing an error when compling. I can run my code when I copy and paste in to Eclipse though.
error messages are below:

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':compileJava'.

Compilation failed; see the compiler error output for details.