l328958741 / Promise_to_learn

learn how to use promise

Promise_to_learn

learn how to use promise

在写apiOfCnode.js中遇到的问题

const request = require('request');

function readTopic(){
    request('https://cnodejs.org/api/v1/topics?' + 'page=1&tab=job&limit=3&mdrender=false',
        function(error, response, body){
            if(error){
                console.log(error);
            }

            let result = JSON.parse(response.body).data;
            // console.log(result[0].author.loginname);
        
            return result[0].author.loginname;
        })
}

let name = readTopic();
console.log(name);  //结果是undefined，为什么？
                    //request()是异步函数，总是在readTopic()执行完后才执行，又readTopic()中没有return,没有赋值给name