对象中的方法在函数中

Question

我试图在一个对象中编写一个方法，这个对象在一个函数中。如下所示：

function createMountain(name, continent, heightInMeters) {
  var object = {
    "name": name,
    "continent": continent,
    "heightInMeters": heightInMeters,
    isHigherThan: function() {}
  }
  return object
}

var mountains = [];

var everest = createMountain("Everest", "Asia", 8849)
var montblanc = createMountain("Mont Blanc", "Europe", 4809)
var denali = createMountain("Denali", "North America", 6190)

mountains.push(everest, montblanc, denali)

方法isHigherThan应该接受一个山体对象作为参数，如果山体比方法中传递的山体高，则返回true，否则返回false。

everest.isHigherThan(denali) //true
montblanc.isHigherThan(everest) //false

我怎么能写这样的函数呢？我正在苦苦挣扎，没有找到一个解决方案。它也应该没有ES6。

提前谢谢你。

Answer 1

解决方案

​

function createMountain(name, continent, heightInMeters) {
  return {
    name: name,
    continent: continent,
    heightInMeters: heightInMeters,
    isHigherThan: function (mountain) {
      return this.heightInMeters > mountain.heightInMeters;
    },
  };
}
// let is from es6
let everest = createMountain("Everest", "Asia", 8849);
let montblanc = createMountain("Mont Blanc", "Europe", 4809);
let denali = createMountain("Denali", "North America", 6190);

console.log(everest.isHigherThan(denali));
console.log(montblanc.isHigherThan(everest));

​