我正在学习JavaScript,因此我正在制作一个小型玩具应用程序以便练习使用它,因为根据我的经验,JavaScript中的OOP与经典语言非常不同。我决定用一些封装使发动机成为单体。
我想问的是,如果两个公共函数以某种方式依赖,是否有更好的方法来实现这种模式?我想问这个是因为我使用对象文字来实现公共接口,但不幸的是,这导致函数表达式不能彼此了解。
或者,我应该完全放弃这个特定模式并以不同的方式实现对象吗?
以下是代码:
function PKMNType_Engine(){
"use strict";
var effectivenessChart = 0;
var typeNumbers = {
none: 0,
normal: 1,
fighting: 2,
flying: 3,
poison: 4,
ground: 5,
rock: 6,
bug: 7,
ghost: 8,
steel: 9,
fire: 10,
water: 11,
grass: 12,
electric: 13,
psychic: 14,
ice: 15,
dragon: 16,
dark: 17,
fairy: 18
};
return {
/**
*Looks up the effectiveness relationship between two types.
*
*@param {string} defenseType
*@param {string} offenseType
*/
PKMNTypes_getEffectivness: function(defenseType, offenseType){
return 1;
}
/**
*Calculates the effectiveness of an attack type against a Pokemon
*
*@param {string} type1 The first type of the defending Pokemon.
*@param {string} type2 The second type of the defending Pokemon.
*@param {string} offensiveType The type of the attack to be received.
*@return {number} The effectiveness of the attack
*/
PKMNTypes_getMatchup: function(type1, type2, offensiveType){
var output = PKMNTypes_getEffectivness(type1, offensiveType) * PKMNTypes_getEffectivness(type2, offensiveType);
return output;
}
};
}
答案 0 :(得分:2)
您可以简单地在构造函数内部(或旁边)定义函数,只需将它们“附加”到新实例即可。这样,函数可以根据需要自由引用:
function PKMNType_Engine(){
"use strict";
function getEffectiveness(defenseType, offenseType){
return 1;
}
return {
PKMNTypes_getEffectivness: getEffectiveness,
PKMNTypes_getMatchup: function(type1, type2, offensiveType){
var output = getEffectiveness(type1, offensiveType) *
getEffectiveness(type2, offensiveType);
return output;
}
};
}