arrays - 值未插入到数组中，数组返回空白值

Question

我有以下代码，问题是 obj 没有插入数组 arr 中。

let arr=[];
let frommilisec=1620000000;
let tomilisec=4680000000;
let slotmilisec=900000;
while(frommilisec<=tomilisec)
{
    let timeslot_milisec=frommilisec+slotmilisec;

    clinicslotsfunc(timeslot_milisec,maximumAppointment,clinicid,dated).then(results=>
    {
        let obj=results[0];
        console.log(obj);   // this displays { slot: '12:30:00', isbooked: 1 }
        arr.push(obj);
    });    
    console.log(arr)   //this logs blank array
    frommilisec=frommilisec+timeslot_milisec;
}

results[0] 包含数据 { slot: '12:30:00', isbooked: 1 }

Answer 1

Promise 是一个异步操作，因此您需要await异步操作的结果:

async yourmethod()
{
    let arr=[];
    let frommilisec=1620000000;
    let tomilisec=4680000000;
    let slotmilisec=900000;
    while(frommilisec<=tomilisec)
    {
        let timeslot_milisec=frommilisec+slotmilisec;    
        let result = await clinicslotsfunc(timeslot_milisec
            , maximumAppointment, clinicid, dated);

        arr.push(result);
    });    
    console.log(arr);
    frommilisec=frommilisec+timeslot_milisec;
    return arr;
}