默认情况下，sort()方法会调用每个对象的toString()

function createComparisonFunction(propertyName){
    return function(object1, object2){
        console.log(arguments)
        var value1 = object1[propertyName];
        var value2 = object2[propertyName];
        if(value1 < value2) {
            return -1
        }else if(value1 > value2) {
            return 1
        }else{
            return 0
        }
    }
}
var data = [{name: 'Zachary', age: 28}, {name: 'Nicholas', age: 29}]
data.sort(createComparisonFunction('name'))
console.log(data[0].name)
data.sort(createComparisonFunction('age'))
console.log(data[0].name)