如何在javascript中创建枚举？

Question

I want javascript functions which take integer ( week days[ie 1,2,3...7 ] ) and return string (ie 'Sunday','Monday'....) . but I dont know what are the best way to do this. it means what I should use enum or array or switch case

• Js function

• function GetFullName(weekDay) { if (weekDay == 1) return "Monday";
if (WeekDay = 2)
return "Tuesday"; }

• But, I dont want to do like this......Is there any smart way to thi using create Enum ?

Answer 1

try this

function GetFullName(weekDay)
{
var days = ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'];
var day = days[ weekDay-1];
return day;
}

Answer 2

Just another thought than array, create an object weekday with dayname and index:

var weekdays = {
    Monday : 1,
    Tuesday : 2,
    Wednesday : 3,
    Thursday:4,
    Friday:5,
    Saturday:6,
    Sunday:7

}

function getFullName(weekDay) {
for( var prop in weekdays ) {
        if( weekdays.hasOwnProperty( prop ) ) {
             if( weekdays[ prop ] === weekDay )
                 return prop;
        }
    }
}

var fullName = getFullName(2);
console.log(fullName);