SOURCE

// 浅拷贝 显示混入
function mixin(sourceObj, targetObj) {
    for(var key in sourceObj) {
        if(!targetObj.hasOwnProperty(key)) {
            targetObj[key] = sourceObj[key];
        }
    }
    return targetObj;
}
var Vehicle = {
    enginess: 1,
    array:["da",12],
    ignition: function() {
        console.log("Turing on my enginee");
    },
    drive: function() {
        this.ignition();
        console.log("Steering and moving forward");
    }
};
var Car = mixin(Vehicle, {
    wheels: 4,
    ignition: function() {
        console.log("ada");
    },
    drive: function() {
        Vehicle.drive.call(this);
        console.log("Rolling on all"+ this.wheels + "wheels");
    }
})
console.log(Car);
Car.drive();
console.log(Car.enginess);
Car.array[0] = "ssss";
console.log(Car.array);
console.log(Vehicle.array);

// 隐式混入
// a = [1,2]
var Something = {
    cool:function() {
        // this.array = a;
        this.array = [1,2];
        this.greeting = "Hellow world";
        this.count = 1;
    }
}
Something.cool();
console.log(Something.greeting);
console.log(Something.count);

const Another = {
    cool: function() {
        Something.cool.call(this);
    }
}
Another.cool();
console.log(Another.greeting);
Another.array[0] = 555;
console.log(Another.array);
console.log(Something.array);