Javascript 如何使用 jquery 创建哈希对象/数组？
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How to create Hash object/array using jquery?
提问by Patrick
I know there is a Hash() object in the Javascript prototype framework, but is there anything in Jquery like this?
我知道在 Javascript 原型框架中有一个 Hash() 对象，但是在 Jquery 中有这样的东西吗？
As I would like to stick with one javascript framework, rather than mixing the Prototype Frame work and the JQuery framework and use at the same time, as I worry there will be conflict and create side-effects.
因为我想坚持使用一个 javascript 框架，而不是将 Prototype Frame 工作和 JQuery 框架混合在一起使用，因为我担心会发生冲突并产生副作用。
So my question is: how to create Hash object/array using jquery?
所以我的问题是：如何使用 jquery 创建 Hash 对象/数组？
Here is my function:
这是我的功能：
/* prototype framework, I want to change this to jQuery! */
var starSaves = new Hash();
function myHover(id, pos)
{
var starStrip = $('star_strip_' + id);
if (starSaves.keys().indexOf(id) == -1)
{
var starSave = new Array();
var imgs = starStrip.select("img")
alert(imgs);
for (var i = 0; i < imgs.length; i++)
{
starSave[starSave.length] = imgs[i].src;
if (i < pos)
imgs[i].src = "/images/star_1.gif";
else
imgs[i].src = "/images/star_0.gif";
}
starSaves.set(id, starSave);
}
}
回答by Tim Down
There's a standalone hash table implementation called jshashtable(full disclosure: I wrote it). Using it, your code would be:
有一个名为jshashtable的独立哈希表实现（完全披露：我写的）。使用它，您的代码将是：
var starSaves = new Hashtable();
function myHover(id, pos)
{
var starStrip = $('star_strip_' + id);
if (!starSaves.containsKey(id))
{
var starSave = new Array();
var imgs = starStrip.select("img")
alert(imgs);
for (var i = 0; i < imgs.length; i++)
{
starSave[starSave.length] = imgs[i].src;
if (i < pos)
imgs[i].src = "/images/star_1.gif";
else
imgs[i].src = "/images/star_0.gif";
}
starSaves.put(id, starSave);
}
}
回答by Matt
A basic Hashcan be achieved with basic JavaScript, not jQuery (I know that Prototype's Hash adds extra functionality, but you don't use it here).
基本的Hash可以用基本的 JavaScript 来实现，而不是 jQuery（我知道 Prototype 的 Hash 添加了额外的功能，但你不会在这里使用它）。
var starSaves = {};
function myHover(id, pos)
{
if (!starSaves.hasOwnProperty(id)) {
var starSave = starSaves[id] = [];
$('#star_strip_' + id + ' img').attr('src', function (index, current) {
starSave.push(current);
return (index < pos) ? '/images/star_1.gif' : '/images/star_0.gif';
});
}
}
回答by Amadu Bah
I think you don't need jQuery for this.
我认为你不需要jQuery。
var hashtable = {
hash: {},
exists: function(key){
return this.hash.hasOwnProperty(key);
},
get: function(key){
return this.exists(key)?this.hash[key]:null;
},
put: function(key, value){
this.hash[key] = value;
}
}
回答by Nalum
There is no prototype Hash equivalent in jQuery that I know of.
我所知道的 jQuery 中没有原型哈希等价物。
Could the following be of any use to you? using jQuery
以下内容对您有用吗？使用 jQuery
var starSaves = {};
function myHover(id,pos)
{
var starStrip = $('.star_strip_' + id);
if(!starSaves[id])
{
var starSave = [];
starStrip.each(function(index,element){
starSave[index] = $(element).attr('src');
$(element).attr('src', index < pos ? '/images/star_1.gif' : '/images/star_0.gif');
});
starSaves[id] = starSave;
}
}
回答by jdcantrell
Glancing at the jQuery documentation I'm not seeing anything that specifically for this. But you can easily do this with just a regular javascript object:
浏览 jQuery 文档，我没有看到任何专门针对此的内容。但是你可以很容易地用一个普通的 javascript 对象来做到这一点：
var starSaves = {};
function myHover(id, pos)
{
var starStrip = $('star_strip_' + id);
if (typeof starSaves[id] == 'undefined')
{
var starSave = new Array();
var imgs = starStrip.select("img")
alert(imgs);
for (var i = 0; i < imgs.length; i++)
{
starSave[starSave.length] = imgs[i].src;
if (i < pos)
imgs[i].src = "/images/star_1.gif";
else
imgs[i].src = "/images/star_0.gif";
}
starSaves[id] = starSave;
}
}
