javascript - 在对象中查找下一个键 id

Question

我将一个对象存储在一个变量中(考虑为数据表)。

var data=[{"controlID":"A","currentValue":"10","onChange":"","onClick":""},
        {"controlID":"B","currentValue":"5","onChange":"Testing(A,B)","onClick":""},
        {"controlID":"C","currentValue":"-5","onChange":"Testing1(A,B)","onClick":""},
        {"controlID":"D","currentValue":"","onChange":"Testing2(B,C)","onClick":""},{"controlID":"E","currentValue":"","onChange":"Testing3(C,D)","onClick":""},{"controlID":"F","currentValue":"","onChange":"","onClick":""}];

现在我知道第二行键值为 B。如何获取第三行(即“C”行值)

我是这个领域的新手。请帮助我们。

Answer 1

此函数将返回您的索引:

var FindIndexOfControlID = function(id, data){
    for(var i = 0; i < data.length ; i++){
        if( data[i]['controlID'] == id ){
            return i;
        }
    }
};

用法:

var index = FindIndexOfControlID('C', data);

实例

http://jsfiddle.net/urahara/medhgm7b/

---

注意

Alternatively you may also want to implement function that returns index of any specified property and value:

var FindIndexOfProperty = function(value, property, data){
    for(var i = 0; i < data.length ; i++){
        if( data[i][property] == value ){
            return i;
        }
    }
}; 

Usage

FindIndexOfProperty('-5', 'currentValue',data); // returns 2