如何在javascript中实现Master详细信息类查找功能?
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03-07-2019 - |
题
我有这段代码:
function Item(id, itemType, itemData, itemCategoryId, itemRank) {
this.id = id;
this.itemType = itemType;
this.itemData = itemData;
this.itemCategoryId = itemCategoryId;
this.itemRank = itemRank;
}
function Category(id) {
this.id = id;
}
我想为Item类编写一个函数,我给它ClassId,它将返回具有此Category id的所有item对象,
什么是最好的方法呢?
解决方案
我看不到阵列......
我认为会有一个项目原型( 请注意,javascript 中没有类),它看起来像这样:
function Item(id, categoryId, data, rank) {
this.id = id;
this.categoryId = categoryId;
this.data = data;
this.rank = rank;
}
function Items() {
this.items = [];
this.findByCategory = function(categoryId) {
var result = [];
for(var i=0;i<this.items.length;i++) {
if (categoryId == this.items[i].categoryId)
result.push(this.items[i]);
}
return result;
}
this.add = function(id, categoryId, data, rank) {
this.items.push(new Item(id, categoryId, data, rank));
}
}
var items = new Items();
items.add(2, 0, null, null);
items.add(1, 1, null, null); // I'm not going to care about data and rank here
items.add(2, 1, null, null);
items.add(3, 1, null, null);
items.add(4, 2, null, null);
items.add(5, 3, null, null);
var cat1 = items.findByCategory(1);
alert(cat1); // you will get a result of 3 objects all of which have category 1
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