獲取和陣列

Question

匹配值我有一個數組是這樣的：

var Data=[{ 
    "Class":"item1","element":["a","b","c","d","e"], 
    "Class":"item2","element":["a","b","c","d","e"], 
    "Class":"item3","element":["a","b","c","d","e"], 
    "Class":"item4","element":["a","b","c","d","e"] 
}]; 

我有兩個變量：

var class='item1'; 
var element='a'; 

我希望有一個條件，如果VAR類值匹配「物品1」那麼var元素的值應該與它的元素匹配，如：

if（class == Data.Class）then元素應該與它附近的Data.element匹配

有何想法？所有你需要修復的

Answer 1

這應該是您的數據......

var Data= [ 
    { "Class":"item1","element":["a","b","c","d","e"] }, 
    { "Class":"item2","element":["a","b","c","d","e"] }, 
    { "Class":"item3","element":["a","b","c","d","e"] }, 
    { "Class":"item4","element":["a","b","c","d","e"] }, 
]; 

然後你可以遍歷它，找到你的價值。像這樣

var class='item1'; 
var element='a'; 
for(var i = 0; i < Data.length; ++i){ 
    if (Data[i].Class == class){ 
     for(var j = 0; j < Data[i].element.length; ++j){ 
      if (Data[i].elements[j] == element){ 
       // do whatever 
      } 
     } 
    } 
} 

Answer 2

首先你data

var Data= [ 
    { "Class":"item1","element":["a","b","c","d","e"] }, 
    { "Class":"item2","element":["a","b","c","d","e"] }, 
    { "Class":"item3","element":["a","b","c","d","e"] }, 
    { "Class":"item4","element":["a","b","c","d","e"] }, 
]; 

現在是對象的數組。

然後你就可以考慮這樣做陣列，例如用for環

var myclass = "item3"; // class is a reserved word 
for (var i=0; i<Data.length;i++) { 
    if (Data[i].Class == myclass) { 
     // do something with that its data Data[i].element 
    } 
}