排序陣列，無論位置和string [ES6]

Question

如果我有類型的數組...

const types = ['train','bus','car']; 
// needs to re-ordered to represent the order belonging to transportationFields. 

和領域的數組...

const transportationFields = [ 
     'bus_station', 'bus_stop', 'bus_line', 'took_bus' // bus -> 1st in the order 
     'car_type', 'buyer_of_car', 'car_model', // car -> 2nd 
     'train_number', 'train_trip_num', 'train_stop', // train -> 3rd 
    ]; 

我我想重新排序types數組以匹配transportationFields數組的順序。我能想到使這項工作的唯一方法是基於字符串過濾，然後排序...

預期輸出：const newTypes = ['bus','car','train'];

我已經試過這樣：

const newTypes = transportationFields.filter((pos) => types.indexOf(pos) > -1); 

但是，從字面上看看確切的字符串名稱。如何根據運輸字段順序中是否存在類型字符串來排序？提前謝謝你的幫助。 （使用陣營ES6）

Answer 1

const transportationFields = [ 
 
    'bus_station', 'bus_stop', 'bus_line', 'took_bus', // bus -> 1st in the order 
 
    'car_type', 'buyer_of_car', 'car_model', // car -> 2nd 
 
    'train_number', 'train_trip_num', 'train_stop', // train -> 3rd 
 
]; 
 

 
const types = ['train', 'bus', 'car']; 
 

 
function findIndex(a) { 
 
    return transportationFields.findIndex(function(v) { // returns index where condition is true 
 
    return v.includes(a) // condition is true if the value includes the string given 
 
    }) 
 
} 
 

 
types.sort(function(a, b) { 
 
    return findIndex(a) > findIndex(b) 
 
}) 
 

 
console.log(types)