class LinkedList {
    push(...values) {
        for (const value of values)
            this.head = { value, next: this.head };
        return this;
    }

    values() {
        const values = []; // causes "Identifier values has already been declared"
        for (let node = this.head; node !== undefined; node = node.next)
            values.push(node.value);
        return values;
    }
}

function clone(origin) {
    const length = origin.length;
    const clone = new Array(length); // works fine, even though have same name as function
    for (let i = 0; i < length; i++)
        clone[i] = origin[i];
    return clone;
}

function LinkedList() {
}

LinkedList.prototype.values = function () {
    const values = []; // fine too, but i suppose this function should implicitly have "values" name
    for (let node = this.head; node !== undefined; node = node.next)
        values.push(node.value);
    return values;
}

function LinkedList() {
}

LinkedList.prototype.values = function values() {
    const values = []; // error here
    for (let node = this.head; node !== undefined; node = node.next)
        values.push(node.value);
    return values;
}