jQuery getJSON从函数返回对象数组？

Question

Is it possible to return the value of an async call like the example below without making it synchronous?

var allUsers;

function getUsers() {
    jQuery.getJSON('http://127.0.0.1:8000/members', function(json) {
        return json;
    });
}

allUsers = getUsers();

Answer 1

A callback function can't return anything because the point of the callback functions is that , so your callback function should implement your logic, something like that,

function getUsers() {
    jQuery.getJSON('http://127.0.0.1:8000/members', function(allUsers) {
        if(allUsers) {
            // you have allUsers here
            // you can do whatever your logic requires here
        }
    });
}

getUsers();