如何在声明的对象中追加/添加具有相同键名的新属性?
这里是代码:
// Declared object
var myObject = {
name : 'John',
age : 15,
};
// Array list of new property need to be add to myObject
var others = [
{ key : 'hobby', value: 'reading' },
{ key : 'hobby', value: 'writing' }
];
到目前为止我一直在尝试:
ko.utils.arrayForEach(others, function(other) {
myObject[other.key] = other.value;
});
和
ko.utils.arrayForEach(others, function(other) {
var extendObject = new Object();
extendObject[other.key] = other.value;
$.extend(myObject, extendObject);
});
结果仍然无法发挥作用。它只是取代现有的属性值
我需要的是这样的事情:
myObject: { name: 'John', age: 15, hobby: 'reading', hobby: 'writing' }
请注意:我不想制作数组:hobby: ['reading', 'writing']
更新
我是为搜索功能实现的,上面的代码和细节是我被卡住的部分的简化版本。
以下是我试图完成的完整代码:
我的观点:
<form data-bind="submit: $root.getSearchData">
<input name="date_start" class="datepicker">
<div class="checkbox">
<label>
<input type="checkbox" name="user_id[]" value="1"> John
</label>
<label>
<input type="checkbox" name="user_id[]" value="2"> Michael
</label>
</div>
</form>
我的viewmodels:
// Will contains new search property need to append to queryData
self.searchPropertyList = ko.observableArray();
// This function will fetch tasks from server
self.getTasksFromServer = function()
{
// Query data
var queryData = {
sort : 'start',
order: 'asc'
};
/**
* When getSearchData function fill formData into searchPropertyList observable,
* this function will get a notify and it will automatically loop through it
* and append new property to queryData.
*/
ko.utils.arrayForEach(self.searchPropertyList(), function(opt)
{
queryData[opt.name] = opt.value;
}
$.ajax({
url: 'api/tasks',
type: 'json',
data: queryData,
success: function(data)
{
}
});
}
// Returned form property as array into searchPropertyList observableArray
// and notify getTaskFromServer function
// This is how formData may look like
// formData = [{ name: 'date_start', value: '2014-08-26' }, { name: 'user_id[]', value: 1 }, { name: 'user_id[]', value: 2 }];
self.getSearchData = function(form)
{
var formData = $(form).serializeArray();
self.searchPropertyList(formData);
}
所以,ajax会请求这样的东西:
api/tasks?sort=start&order=asc&date_start=2014-08-26&user_id[]=1&user_id[]=2
有人,请帮助,谢谢:)
答案 0 :(得分:2)
正如评论所说,你不能拥有同名的多个财产。
你可以做些什么来将爱好值添加到同一个爱好属性中,并在你需要所有爱好时拆分它:
var person = { hobby: "programmer" };
// adding another hobby
person.hobby =+ "-secretary";
var hobbies = person.hobby.split("-"); // [programmer,secretary]
答案 1 :(得分:0)
重复
How can I store multiple values per key in a hash table using Node.JS?
你必须使用{key,[array]}作为值的hashmap,并使用自定义方法来推送和弹出。
答案 2 :(得分:0)
您无法在对象内添加/附加相同的键和差值,但您可以添加和额外的键,例如下面的代码。通过这样做,您可以区分相同的密钥:
// Declared object
var myObject = {
name : 'John',
age : 15,
};
// Array list of new property need to be add to myObject
var others = [
{0 : { key : 'hobby', value: 'reading' }},
{1 :{ key : 'hobby', value: 'writing' }}
];