Chained Arrow function syntax

Question

const fetch = url => dispatch => {
  // ...
}

export const fetchQuestions = tag => (dispatch) => {
  return dispatch(fetch(tag));
};

What

Answer 1

dispatch is the first and single parameter of the function returned by the url => ... function. With normal function syntax, it would be

const fetch = function(url) {
    return function(dispatch) {...}
}