如何檢查JSON響應元素是否爲數組？

Question

我收到的下一個JSON響應

{ 
    "timetables":[ 
     {"id":87,"content":"B","language":"English","code":"en"},             
     {"id":87,"content":"a","language":"Castellano","code":"es"}], 
    "id":6, 
    "address":"C/Maestro José" 
    } 

我想實現下一個僞代碼的功能

for(var i in json) {    
    if(json[i] is Array) { 
    // Iterate the array and do stuff 
    } else { 
    // Do another thing 
    } 
} 

任何想法？

Answer 1

還有其他方法，但是，據我所知，這是最可靠的：

function isArray(what) { 
    return Object.prototype.toString.call(what) === '[object Array]'; 
} 

因此，將其應用到你的代碼：

for(var i in json) {      
    if(isArray(json[i])) { 
    // Iterate the array and do stuff 
    } else { 
    // Do another thing 
    } 
} 

Answer 2

function isArray(ob) { 
    return ob.constructor === Array; 
} 

Answer 3

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray

if(Array.isArray(json[i])){ 
    // true 
    ... 
}