在json中使用id查找对象索引

Question

I have a json that contains many objects:

[Object, Object, Object, ... ]

Inside each object there is an object number and an id:

0: Object
id: "theObjectImLookingFor"
...

How can I find the object number (0) using the id "theObjectImLookingFor" in javascript?

Answer 1

Try this:

function someFunc(){
    var objArr = [Object, Object, Object, ... ];
    for(var i = 0; i < objArr.length; i++){
         if(objArr[i].id == "theObjectImLookingFor")
            return i;
    }
    return "No value matched";
}

Answer 2

This assumes there's only one property with a numeric name. This is a very strange way to store something you want to be able to look up. Why not give each object an obj_number property?

function find_object(json, str) {
    for (var i = 0; i < json.length; i++) {
        if (json[i].id == str) {
            for (var key in json[i]) {
                if (IsNumeric(key)) {
                    return key;
                }
            }
        }
    }
    return false; // Not found
}