从JavaScript

Question

var old_response = ["a,b,c","x,y,z","e,f,g"] 
new_response = ["a,b,c,x,y,z,e,f,g"]

目前我收到的是old_response，而不是我需要的new_response

Answer 1

只需使用Array#join方法加入元素并放入一个新数组。

var old_response = ["a,b,c","x,y,z","e,f,g"] ;

var new_response = [old_response.join()];

console.log(new_response);

Answer 2

old_response = ["a,b,c","x,y,z","e,f,g"]
console.log([old_response.join()])

Answer 3

您可以将数组转换为字符串：

firebase.auth().onAuthStateChanged(function(user){
        if(user){
            console.log(user);
            console.log('logged in');
            signInButton.style.display = "none";
            signOutButton.removeAttribute('hidden');


            messaging.getToken()
                .then(function(currentToken) {
                    console.log(currentToken);
                })
                .catch(function(err) {
                    console.log('Unable to retrieve refreshed token ', err);
                });


            messaging.onTokenRefresh(function() {
                messaging.getToken()
                    .then(function(refreshedToken) {
                        console.log(refreshedToken);
                        console.log('Token refreshed.');
                    })
                    .catch(function(err) {
                        console.log('Unable to retrieve refreshed token ', err);
                    });
            });

            messaging.onMessage(function(payload){
                console.log('onMessage: ', payload);
            })
        }else{
            console.log('not logged in');
        }


    });