Array Manipulations JS Fundamentals

function arrayManipulations(input) {
    let arr = input[0].split(' ').map(Number);
    let commands = input.slice(1);

    for (let i = 0; i < commands.length; i++) {

        let tokens = commands[i].split(' ');
        let command = tokens[0];
        let parameters = tokens.slice(1).map(Number);


        function executeCommand(command, parameters, arr) {
            switch (command) {
                case "Add":
                    arr.push(parameters[0]); return arr;
                case "Remove":
                    arr = arr.filter(x => x !== parameters[0]); return arr;
                case "RemoveAt":
                    arr.splice(parameters[0], 1); return arr;
                case "Insert":
                    arr.splice(parameters[1], 0, parameters[0]); return arr;
            }
        }

        arr = executeCommand(command, parameters, arr);
    }

    console.log(arr.join(" "));
}