javascript - 如何在不覆盖值的情况下合并javascript中的对象

Question

如何将对象中的重复键合并到一个对象中并连接对象中的值我有这样的对象

var object1 = {
    role: "os_and_type", 
    value: "windows"
};
var object2 = {
    role: "os_and_type", 
    value: "Android"
};
var object3 = {
    role: "features", 
    value: "GSM"
};

我怎样才能实现这个目标

new_object = [{
    role: "os_and_type",
    value: ["windows", "android"]         
}, {
    role: "features",
    value: ["GSM"]
}];

Answer 1

给你:

var object1 = {
    role: "os_and_type", 
    value: "windows"
};
var object2 = {
    role: "os_and_type", 
    value: "Android"
};
var object3 = {
    role: "features", 
    value: "GSM"
};

function convert_objects(){
    var output  = [];
    var temp    = [];
    for(var i = 0; i < arguments.length; i++){  // Loop through all passed arguments (Objects, in this case)
        var obj = arguments[i];                 // Save the current object to a temporary variable.
        if(obj.role && obj.value){              // If the object has a role and a value property
            if(temp.indexOf(obj.role) === -1){  // If the current object's role hasn't been seen before
                temp.push(obj.role);            // Save the index for the current role
                output.push({                   // push a new object to the output,
                    'role':obj.role,
                    'value':[obj.value]         //   but change the value from a string to a array.
                });
            }else{                              // If the current role has been seen before
                output[temp.indexOf(obj.role)].value.push(obj.value); // Save add the value to the array at the proper index
            }
        }
    }
    return output;
}

这样调用它:

convert_objects(object1, object2, object3);

您可以根据需要向函数添加任意数量的对象。