我试图用javascript创建我自己的提醒应用程序，所以基本上我可以创建一组提醒，如类别（工作，学校，编程提醒等）。并且每个都可以在工作类别中提醒他们，我可以在那里提供提醒列表等等。我还想在本地存储上保存集合及其提醒，并在页面上重新创建它们。当然，提醒列表应该在它所属的集合上。
在我做这个页面之前，我真的想先对这个进行建模，然后我决定继续使用oop方法作为练习，我想知道如何将它们联系起来，这是我到目前为止所得到的......
var ReminderSet = function(set){
this.set = set; //could be work, school , etc
}
var Reminders = function(new_reminder){
this.reminders = new_reminder; // a new reminder
}
ReminderSet.prototype.reminders = new Reminders();
ReminderSet.prototype.printSet = function(){
console.log(this.set, this.reminders); /* gives the ff output
work { reminders: 'finish task on time' }
school { reminders: 'study on chem' }*/
}
var workReminders = new ReminderSet("work"); // create a new set of reminder
var schoolReminders = new ReminderSet("school"); // create a new set of reminder
workReminders.reminders = new Reminders("please the boss"); //add a new reminder to work
workReminders.reminders = new Reminders("finish task on time");//add a new reminder to work
schoolReminders.reminders = new Reminders("finish projects"); //add new reminder to school
schoolReminders.reminders = new Reminders("study on chem"); //add new reminder to school
workReminders.printSet();
schoolReminders.printSet();
问题是它不会让我为该组创建多个提醒，我希望你能帮助我这个谢谢你！为了清楚起见我只学习了3个月的javascript，这是我第一次做oop虽然我以前做过一些以前的任务项目，但我认为真正熟悉oop非常重要。
答案 0 :(得分：0)
尝试这个，在创建新实例时使用函数作为模板填充，而不是将它们作为自己的变量。
function ReminderSet(set){
this.set = set; //could be work, school , etc
}
function Reminders(new_reminder){
this.reminders = new_reminder; // a new reminder
}
ReminderSet.prototype.reminders = new Reminders();
ReminderSet.prototype.printSet = function(){
console.log(this.set, this.reminders); /* gives the ff output
work { reminders: 'finish task on time' }
school { reminders: 'study on chem' }*/
}
var workReminders = new ReminderSet("work"); // create a new set of reminder
var schoolReminders = new ReminderSet("school"); // create a new set of reminder
workReminders.reminders = new Reminders("please the boss"); //add a new reminder to work
workReminders.reminders = new Reminders("finish task on time");//add a new reminder to work
schoolReminders.reminders = new Reminders("finish projects"); //add new reminder to school
schoolReminders.reminders = new Reminders("study on chem"); //add new reminder to school
workReminders.printSet();
schoolReminders.printSet();
答案 1 :(得分：0)
您可以将数组设置为class的属性，并使用一个对象，其中属性名称是提醒名称，值可以是任何类型
class Reminders {
constructor() {
this.reminders = [];
}
setReminder(key, prop) {
const reminder = {
type: key,
value: prop
};
this.reminders.push(reminder);
return this;
}
getReminder(key) {
return this.reminders.filter(({type}) => type === key)
}
}
let reminders = new Reminders()
reminders.setReminder("work", ["a", "b"]);
let work = reminders.getReminder("work");
reminders.setReminder("school", "study")
let school = reminders.getReminder("school");
reminders.setReminder("do stuff", "stuff")
let stuff = reminders.getReminder("do stuff");
for (let [{type, value}] of Object.values([work, school, stuff])) {
console.log(`reminder type:${type}, reminder value:${value}`)
}
答案 2 :(得分：0)
您只能添加一个提醒的原因是因为您没有构建提醒集合。每次设置新提醒时，都会覆盖之前的提醒。
我已经重新编写了您发布的代码，使用我认为更直观的属性名称，还要在每个public class OddsAndEvens {
// counts all the odd numbers in the array
private static int countOdds(int[] array) {
int count = 0;
for(int i = 0; i < array.length; i++) {
if(array[i] % 2 == 1 && array[i] % 2 != 0) {
count++;
}
}
return count;
}
// returns an array with all the odd numbers
public static int[] getAllOdds(int[] array) {
int[] yaArray = new int[countOdds(array)];
int j = 0;
for(int i = 0; i < array.length; i++) {
if(array[i] % 2 == 1 && array[i] % 2 != 0) {
yaArray[j] = array[i];
}
j++;
}
return yaArray;
}
}
///////////////////////////////////////////////////////////
runner code
public class OddsAndEvensRunner {
public static void main(String args[]) {
System.out.println("Odds - " + Arrays.toString(OddsAndEvens.getAllOdds(new int[]{2,4,6,8,10,12,14})));
System.out.println("Evens - " + Arrays.toString(OddsAndEvens.getAllEvens(new int[]{2,4,6,8,10,12,14})));
System.out.println("\nOdds - " + Arrays.toString(OddsAndEvens.getAllOdds(new int[]{1,2,3,4,5,6,7,8,9})));
System.out.println("Evens - " + Arrays.toString(OddsAndEvens.getAllEvens(new int[]{1,2,3,4,5,6,7,8,9})));
System.out.println("\nOdds - " + Arrays.toString(OddsAndEvens.getAllOdds(new int[]{2,10,20,21,23,24,40,55,60,61})));
System.out.println("Evens - " + Arrays.toString(OddsAndEvens.getAllEvens(new int[]{2,10,20,21,23,24,40,55,60,61})));
}
}
内构建一组提醒。
ReminderSet