书写开关的更好方法

Question

任何缩短（或更有效）的写入方法。准确地说，每天，每周...都从界面中取出（输入[select]）

switch(repeatFrequency) { 
       case "daily": 
        diffDays = 1; 
        break; 
       case "weekly": 
        diffDays = 7; 
        break; 
       case "weekly_2": 
        diffDays = 14; 
        break; 
       case "monthly": 
        diffDays=31;//we assume the worst case 
        break; 
       case "monthly_3": 
        diffDays = 92;//we assume the worst case 
        break; 
} 

Answer 1

更好的方法是使用散列（地图）对象。是这样的：

var hash = { 
    'daily': 1, 
    'weekly': 7, 
    'weekly_2': 14, 
    'monthly': 31, 
    'monthly_3': 93, 
}; 
var diffDays = repeatFrequency in hash? hash[repeatFrequency] : default_value;