Javascript 从数组中获取和匹配值

我有一个数组，如下所示：

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"]
}];

我有两个变量：

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

我想要一个条件，如果var类值与“item1”匹配，那么var元素值应该与其元素匹配，如下所示：

若为（class==Data.class），则元素应与其附近的Data.element匹配

---

有什么想法吗？

首先，您需要修复数据

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"] },
];

现在它是一个对象数组

然后可以查看该数组，例如使用

for

循环

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
    }
}

var myclass=“item3”//类是一个保留字
对于（var i=0；i这应该是您的数据

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"] },
];

然后你可以迭代它，找到你的值

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
            }
        }
    }
}

var class='item1'；
var元素='a'；
对于（变量i=0；i
您的
数据
变量错误。如何将相同的键/值对重复4次。将只存储最后一个键/值对。
数据
数组中的对象重新定义
“类”
和
“元素”
。你是说每一行都是数组中一个单独的对象吗？是的，freejosh和它的最佳结构应该是什么mohkhanIt应该是这样的var数据=[{“类”：“项1”，“元素”：[“a”，“b”，“c”，“d”，“e”]}，{“类”：“项2”，“元素”：[“a”，“b”，“c”，“c”，“d”，“e”]}，{“类”：“项3”，“元素”：[“a”，“b”，“c”，“d”，“e”]}，{“Class”：“item4”，“element”：[“a”，“b”，“c”，“d”，“e”]}}]；好吧，你现在想做什么……这取决于你。你没有指定你想要什么。你能检查一下并告诉我这有什么问题吗？它不接受同一个元素的数据