pedantic

export function identity(x) {
  return x;
}

export function object_from_list(list) {
  const obj = {};
  while (list && list.head !== undefined) {
    const pair = list.head;
    obj[pair[0]] = pair[1];
    list = list.tail;
  }
  return obj;
}

export function list_to_array(list) {
  const arr = [];
  while (list && list.head !== undefined) {
    arr.push(list.head);
    list = list.tail;
  }
  return arr;
}

export function encode_dynamic_to_json_string(term) {
  return JSON.stringify(term);
}

export function is_js_array(x) {
  return Array.isArray(x);
}

export function is_js_plain_object(x) {
  return x !== null && typeof x === "object" && Object.getPrototypeOf(x) === Object.prototype;
}

export function is_null_or_undefined(x) {
  return x === null || x === undefined;
}