Question

我正在寻找一种管理集合集合的方法。请参阅下面的示例代码：

function Collection() {
    this.items = []; //Contains items, which have a date associated with them
}
Collection.prototype.doSomethingOnItems = function(){};

function SuperCollection() {
    this.collections = []; //An array of Collection objects
    this.group = []; //A vector with a string that designates the group (e.g. 2013, 2012)
}
SuperCollection.prototype.groupCollections = function(items, groupType) {
    //Group by year, month, day, etc...
    //For example, given a timeframe of 2012-2013, items in 2012 are put in collections[1], those from 2013 are in collections[2]
}

有没有更好的方法来管理这样的结构？

Answer 1

我喜欢把事情做成通用/抽象的

function Collection(items)
{
    // Could/should do some checking/coercion here 
    this.items = items || [];
};

Collection.prototype.add = Collection.prototype.push = function(item)
{
    this.items.push(item);
};

Collection.prototype.remove = function() {} ....

 // etc...

// A single Group
function Group(name, items)
{
    this.name = name;
    this.items = new Collection(items);
};

// A Collection of groups
function Groups()
{
    this.groups = new Collections();
};

或者您可以使用Collection的原型（一种继承形式）扩展Groups的原型例如（使用jQuery或任何其他库，或编写自己的库）

function Groups()
{

};

$.extend(Groups.prototype, Collection.prototype);

让我们留下：

var groups = new Groups();

groups.add(new Group("2013", []));

所有这些允许您将逻辑分开，并在Group / Group'类'中包含与Collection'class'分开的辅助方法

如何管理集合集合？

1 个答案: