这段代码如何调用？

Question

function create(propertyName) {    return function(object1,object2){
        var value1 = object1[propertyName];
        var value2 = object2[propertyName];        if(value1 < value2) {            return -1;
        } else {            return 0;
        }
    };
}

Answer 1

var compareAge=create('age');var a1={  age:10};var a2={   age:20};console.log(compareAge(a1,a2));